April, 2004 - British Shell Collectors' Club

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Page 4PALLIDULAThe Molluscs of Dogs BayBy John Fisher.Dogs Bay is a small secluded sandy inlet on the Roundstone peninsula in County Galway onthe west coast of Ireland. It is bordered on each side by rocky outcrops and faces the openAtlantic Ocean. It is renowned for its enormous variety of molluscs which are largely obtainedfrom the shell grit and drifts on the beach.My study has been conducted over a period of four years and has involved sorting throughover one hundredweight of grit collected at various times over this period.The beach is extremely variable, at times it is totally sandy with not a shell in sight and atothers there is nothing but shells. On the latter occasions one has to be patient sortingthrough literally millions of Rissoa parva in the hope of finding something new.When I visited Dogs Bay in <strong>April</strong> 2002 it was one of those occasions when the beach wascovered with sand and I was unable to find any shell grit at all. However on my way off thebeach I noticed a drift of black material which I presumed was disintegrated seaweed. Onclose inspection this was full of small white shells, so I collected four good sized bags andput it in the boot of the car, only to get into trouble later from Margaret when we discoveredthe bags were not watertight and the boot was saturated. But all was not lost and thecontents provided several additions to the species list. The most notable being Spiratellaretroversa, a very minute and delicate sinistral shell which I had never seen before and herethey were in very good numbers. Also the specimen of Odostomia and Brachystomia werein very good condition showing both spiral and growth lines, making identificationconsiderably easier. This was also the only occasion when I was fortunate enough to findspecimens of Pusillina sarsi, Ammonocera rota, and Aclis ascaris, presumably thesenormally get broken up by the wave action on the beach.I have been impressed by the variety of turrids recorded on nearly every visit. Thecommonest of these is Mangelia nebula which can be collected in good numbers by justwalking along the beach. Others include Haedropleura septangularis, Cytharellacoarctata,Oenopota rufa, Oenopota turricula, Raphitoma linearis, and Raphitoma purpurea.My interest in Dogs Bay is far from finished as I still have approximately 14lbs of shell gritsitting in the garage but with winter approaching it will keep me occupied on those colddreary nights.On my next visit I shall be brushing and scraping the rocks at either end of the bay in order toascertain which species live in the littoral zone and which have been washed up from deeperwater.As the beach is also an outlet to several freshwater streams the shell grit contains someinteresting land and freshwater species including Vertigo angustior, the origin of which I stillhave to locate.The following is my complete list of shells obtained to date.GASTROPODS.Diodora graeca. Linnaeus 1758Acmaea virginea Muller 1776Patella vulgata . Linnaeus 1758Helcion pellucidum. Linnaeus 1758Gibbula tumida . Montagu 1803Gibbula umbilicalis. daCosta 1778Monodonta lineata. daCosta 1778Skenea nitens Philippi 1844Skenea serpuloides. Montagu 1808Tricolia pullus. Linnaeus 1758Lacuna pallidula. daCosta 1778Rissoa lilacina. Recluz 1843Rissoa rufilabrum. Alder 1844Rissostomia membranacea. J.Adams 1800Lacuna parva. daCosta 1778Lacuna vincta. Montagu 1803Littorina neglecta. Bean 1844Littorina neritoides. Linnaeus 1758Littorina littorea. Linnaeus 1758Littorina obtusata. Linnaeus 1758Littorina saxatilis. Olivi 1792Hydrobia ulvae. Pennant 1777Rissoa parva. daCosta 1778Rissoa parva interrupta. Adams 1798Spiratella retroversa. Fleming.Philine catena. Montagu 1803.Philine punctata. Adams 1800.Cylichna cylindracea. Pennant 1777.
PALLIDULA Page 5Pusillina sarsi. Loven 1846Alvania cancellata. daCosta 1778Alvania cimicoides. Forbes 1844Alvania punctura. Montagu 1803Alvania semistriata . Montagu 1808Manzonia crassa. Kanmacher 1798Cingula trifasciata. J.Adams 1800Onoba aculeus. Gould 1841Onoba semicostata. Montagu 1803Barleeia unifasciata. Montagu 1803Barleeia unifasciata rubra. J.Adams 1797Cingulopsis fulgida. J.Adams 1797Rissoella diaphana. Alder 1848Omalogyra atomis. Philippi 1841.Ammonocera rota. Forbes & Hanley 1850Skeneopsis planorbis. Fabricus 1780.Circulus striatus. Philippi 1836.Caecum glabrum. Montagu 1803.Caecum imperforatum Kanmacher 1798.Turritella communis. Risso 1826.Bittium reticulatum. DaCosta 1778.Aporrhais pespelecani. Linnaeus 1758Lamellaria latens. Muller 1776.Velutina velutina Muller 1776.Trivia monacha. DaCosta 1778.Trivia arctica. Pulteney 1799.Lunatia alderi. Forbes 1838.Nucella lapillus. Linnaeus 1758.Ocenebra erinacea. Linnaeus 1758.Chauvetia brunnea. Donovan 1804.Nassarius incrassata. Strom 1768.Nassarius pygmaea. Lamarck 1822.Nassarius reticulata. Linnaeus 1758.Haedropleura septangularis. Montagu 1803.Oenopota rufa. Montagu 1803.Oenopota turricula. Montagu 1803.Mangelia nebula. Montagu 1803.Cytharella coarctata. Forbes 1840.Raphitoma linearis. Montagu 1803.Raphitoma purpurea. Montagu 1803.Cerithiopsis pulchella. Jeffreys 1858.Cerithiopsis tubercularis. Montagu 1803.Triphora adversa. Montagu 1803Epitonium clathratulum. Kanmacher 1798.Epitonium clathrus. Linnaeus 1758.Janthina exigua. Lamarck 1816.Aclis ascaris. Turton 1819.Cima minima. Jeffreys 1858.Graphis albida. Kanmacher 1798.Eulima bilineata. Alder 1848.Melanella alba. DaCosta 1778.Chrysallida decussata. Montagu 1803.Chrysallida indistincta. Montagu 1808.Chrysallida obtusa. Brown 1827.Evalea diaphana. Jeffreys 1848.Evalea obliqua Alder 1844.Evalea warreni. Thompson 1845.Jordaniella nivosa. Montagu 1803.Brachystoma albella. Loven 1846.Brachystoma eulimoides. Hanley 1844.Brachystoma rissoides. Hanley 1844.Odostomia plicata. Montagu 1803.Odostomia turrita. Hanley 1844.Odostomia unidentata. Montagu 1803.Ebala nitidissima. Montagu 1803.Leucophytia bidentata. Montagu 1808.Diaphana minuta. Brown 1827.Cadulus jeffreysi. Monterosato.Retusa truncatula. Bruguiere 1792.Siphonodentalium lofotense. M.Sars.Turbonilla lactea Linnaeus 1758.BIVALVES.Arca tetragona PoliAnomia ephippium. Linnaeus 1758.Heteranomia squamula. Linnaeus 1758.Monia squama. Gmelin 1791.Monia patelliformis. Linnaeus 1758.Modiolus phaseolinus. Philippi 1844.Mytilus edulis. Linnaeus.1758.Chlamys varia. Linnaeus.1758.Chlamys opercularis. Linnaeus.1758.Lima loscombi. Sowerby 1841.Lima subauriculata. Montagu 1803.Lucinoma borealis. Linnaeus 1758.Thyasira flexuosa. Montagu 1803Kellia suborbicularis. Montagu 1803.Lasaea rubra. Montagu 1803.Neolepton sulcatulum. Jeffreys 1865..Montacuta ferruginosa. Montagu 1803.Mysella bidentata. Montagu 1803.Parvicardium exiguum. Gmelin 1791..Parvicardium scabrum. Philippi 1844Cerastoderma edule. Linnaeus.1758.Timoclea ovata. Pennant 1777.Chamelea striatula. daCosta 1778.Clausinella fasciata. daCosta 1778..Venerupis pullastra. Montagu 1803.Irus irus. Linnaeus 1758.Turtonia minuta. Fabricius 1780.Mactra corallina. Linnaeus 1758.Spisula subtruncata. daCosta 1778.Donax vittatus. daCosta 1778Tellina tenuis. daCosta 1778..Tellina fabula. Gmelin 1791.Tellina pygmaea. Loven .Gari tellinella. Lamarck 1822.Ensis arcuatus. Jeffreys 1865.Mya truncata. Linnaeus 1758.Hiatella arctica. Linnaeus 1758.Dogs Bay, Co.Galway, Ireland
Page 1 and 2: ISSN 0140-2471•VOL.34•NO.1•AP
Page 3: PALLIDULA Page 3SYMBIOSISBY JOHN FI
Page 7 and 8: PALLIDULA Page 7SHELLING IN NEW CAL
Page 9 and 10: PALLIDULA Page 9Phos senticosus L.1
Page 11 and 12: PALLIDULA Page 11A live Mauritia ar

April, 2004 - British Shell Collectors' Club

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