DESCRIPTION OF SPECIES. 
Class—LAMELLIBRANCHIA, Blainville. 
Family—NUCULANIDA, Stoliczka. 
Genus—Nvcwutana, H. F. Link, 1807. 
(‘ Beschreib. der Naturalien-Samwml. der Universitit zu Rostock,’ vol. iii, p. 155.) 
1. Lower Cretaceous Species. 
Nocutana spaTuutata (Forbes), 1845. Plate I, figs. 1, 2a—e, 3. 
1845. Nucvuta sparuurara, £. Forbes. Quart. Journ. Geol. Soe., vol. i, p. 245, 
pl. iii, fig. 4. 
1854. Lepa spatuunata, J. Morris. Cat. Brit. Foss., ed. 2, p. 205. 
1866. — _ EF. J. Pictet and G. Campiche. Foss. du Terr. Crét. 
de Ste. Croix (Matér, Pal. Suisse, ser. 4), 
pt. 3, p. 401. 
1884. — -- J.S. Gardner. Quart. Journ. Geol. Soce., vol. xl, p. 189 
(partim), pl. v, fig. 80 ? (non 831—84), 
Description.—Shell thin, compressed, elongate, very inequilateral; short and 
rounded anteriorly; long and rapidly tapering posteriorly, with a faint carina 
extending from the umbo to the postero-ventral extremity, and cutting off a 
flattened area, which is ornamented with lines of growth only. Posterior 
extremity truncated and somewhat rounded. Antero-dorsal border slightly 
convex ; postero-dorsal border nearly straight, with a slight ventral slope. 
Umbones small. Surface (except the postero-dorsal part) ornamented with 
numerous fine concentric ribs. 
Measurements : 
Q) (2) 
Length . ; ; 1405 : 16:0 mm. 
Height . ‘ 6°5 ‘ : 6:0 
(1) In the Wiltshire Collection, Woodwardian Museum, PI. I, figs. 2, 3. 
(2) The type (a cast), Pl. I, fig. 1. 
99 
1 For accounts of the classification of the Nuculanide see G. Seguenza, “ Nuculidi terziare 
d’ Italia,” ‘ Atti della R. Accad. dei Lincei,’ ser. 34, vol.i (1877), p. 1163; and A. E. Verrill and 
K. J. Bush, ‘Amer. Journ. Sci.,’ ser. 4, vol. iii (1897), p. 51. Owing to the imperfect preservation 
of the interiors of many of the Cretaceous forms of this group, Nueulana is here used in the 
extended sense. 
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