History of British animals - University of Guam Marine Laboratory

292 MOLLUSCA. BRANCHIFERA. Bulla.Lamellaria mem. Mont. Linn. Trans, xi. 184. t. xii. f. 3; the shell fig.4.— English coast.Length and breadth about two inches ; of a brownish colour, paler above,and spotted with bluish-grey beneath ; tentacula subcylindric, with two eyesat the base ;a cylindrical snout ; shell ovate, very thin, p flat, with a minutelateral whorl ; silvery, tinged with pink.Gen. XLVI. BULLA.— Bodyin front with a fleshy expansionor tentacular disc ;behind with a membranaceous appendageor lid ;shell convoluted ;aperture the whole lengthof the shell.* Shells with a cuticle, external.170. B. lignaria.— Shell ovate, spirally striated; mouth wide,anteally, rendering the pillarvisible to the end.Concha veneris major leviter et dense striata, List. Conch, t. lxxiv. f. 11.—B. lig. Linn. Syst.i. 1184. Penn. Brit. Zool. iv. 11C B. scabra,Mull. Zool. Dan. t. 71—B. lig.Mont. Test. Brit. 20G Not uncommon.Length upwards of 2 inches ;width 1 \t\\ ofan inch ; epidermis brown ; aperturecontracted retrally by the body-whorl ; the apex depressed; pillar-liprounded ; outer lip nearly straight;gullet large, tblded ;stomach fortifiedbythree testaceous plates.171. B. akera.— Shell ovate, smooth ;aperture wide, and renderingthe pillar visible.Akera bullata, Mull. Zool. Dan. t. lxxi. f. 2, 9.— B. resiliens, Don. Brit.Shells, t. lxxix B. akera, Mont. Test. Brit. 219—On the shores ofBanff and Devon.Length about |ths of an inch ;breadth half an inch ; translucent, elastic,glossy, with a greenish tinge. Aperture wide anteally ; retrally it is veryclose to the body-whorl, but does not adhere until it has taken almost one volution; apex concave, exhibiting two or three volutions. The ltev. CharlesCordiner observed this shell in the Murray Frith, and transmitted specimensto the Duchess of Portland.—On some parts of the English coast it is not uncommon.-* 172. B. liydatis.— Shell subglobular, minutely striated spirally; aperture wide anteally ; the pillar-lip rounded, but the pillarnot visible to the end.Linn. Syst.i. 1183—B. ampulla, Penn. Brit. Zool. iv. 11G.--B. hyd.Don, Brit. Shells, t. lxxxviii On the English coast.Length 1 inch breadth ; f ths ; translucent, with a brownish epidermis ;aperture interrupted by the rounded body-whorl apex concave, but not exhibitingvolutions. Animal purplish-brown and, when ; expanded, double;the length of the shell; two eyes on the tentacular disc, sunk in small whitedepressions Mont. Linn. Trans, ix. 10G. t. vi. f. 1.173. B. Cranchii.— Shell subcylindrical, strongly striated spirally; aperture narrow, rendering the continuation of the pillarinvisible ;pillar-lip straight.Mr Prideaux, Plymouth Sound.