History of British animals - University of Guam Marine Laboratory

Turbinolia. ZOOPHYTA. LAMELLIFERiE. 50i)249. Two specimens found in 1809, growing on a dead valve of Pectenopercularis, from deep water off Foulah, in Zetland.The largest specimen is inversely conical ; a little compressed ; half an inchin height ; two-tenths, in its broadest diameter at the base, and six-tenths atthe star, where it is four-tenths across ; externally it is longitudinally striatedand rough. The disc is oval, and a little compressed. The lamella? are disposedin fours, and may be distinguished into three different kinds. The firstare the highest and the broadest at the margin, but as they descend into thedisc they become narrower before they join the central plate. The secondkind are narrower than the preceding at the margin, but towards the middlethey suddenly enlarge and join the middle plate. The third kind are thesmallest, and terminate before reaching the middle plate. The space includedbetween a pair of the first kind of plates, contains one of the second kind inthe middle, with one of the third kind in each of the lateral spaces. Thoseon the sides are rough, with small scattered tubercles, and their margins arecurled. This last circumstance occasions the roughness externally, where thelongitudinal strire are the remains of the Thegills. plate which occupies thebottom of the concavity is smooth, various twisted, and connected with thebase of the lateral plates. When first observed, the disc was covered withblack putrid animal matter.— It has been reported that the C. musicalis (Ellis,Phil. Trans. 1/G3, t. xx. f. 14.) has been cast ashore on the Irish coast.EXTINCT SPECIES.1. C. annularis.— Branched, nearly cylindrical, with transverse plates, whichexteriorly seem — like a series of ligatures surface not muricated. ;Madreporite,Park. Org. Rem. ii. G"J. t. v. f. 5.— In Oolite.2. C. fasciculata.— Crowded, branched, round, nearly cylindrical, slightlyflexuous, and about a quarter of an inch in diameter Madreporite, Park.Org. Rem. 8.— 51. t. vi. f. Madrepora cespitosa, Marl. Derb. t. 17 CarboniferousLimestone.3. C. duplicating Tubes cylindrical, adjacent, unequal ; centre proliferous ;margin dilated Madrepora dup. Mart. Pet. xxx.— Derb. t. CarboniferousLimestone.4. C. affinis Stems slightly branched, cylindrical, equal, smooth, ratherdistant, and about half an inch in diameter.—M. aff. Mart. Derb. t. 31—CarboniferousLimestone.5. C. juncea Stems slightly branched, cylindrical, smooth, or slightlywrinkled transversely, and about one-tenth of an inch in diameter.—Juncilapidei, Ure, Ruth. 337- t. xix. 12— f. Very common in. Carboniferous Limestone.G. C. centralis Root spreading, indented ;stem narrow at the base ;enlargingsubcylindrically towards the tip ; longitudinally striated ;the striaealternately larger and smaller no transverse centre— ; stria? ;disc with small and largeplates from the circumference to the Corallite, Park. Org. Rem. ii.32. t. iv. f. —15, 10. Madrepora centralis, Mant. Geol. 159. t. xvi. 1. 2, 4—InChalk.It is probable that Amplexus coralloides, p. 251. though inserted by MrSowerby among the multilocular testacea, may yet be found connected withthe piesent genus.Gen.XXX. TURBINOLIA.—Turbinated, detached, baseacute, not adhering ;star single.71. T. borealis.— Widely conical, slightly bent.