NUCULANA. 7 
Affinities. —This species is much smaller and less inequilateral than N. sca- 
phoides (Pictet and Campiche). For its relations to . scapha (d’Orbigny), 
N. lineata (Sowerby), and N. angulata (Sowerby), see pp. 4, 7, &. 
Types.—I have not seen the type. The specimens figured by Gardner are in 
the British Museum. 
Distribution.—Lower Gault (zones ii, and iv to vii) of Folkestone. Gardner 
records it also from the Folkestone Beds and the Upper Gault. 
Noucunana Linuata (Sowerby), 1836. Plate I, figs. 28 a, b, 29, 30, 31 a—d, 32 a—e. 
1836. Nucuna mixeata, J. de C. Sowerby. Trans. Geol. Soc., ser. 2, vol. iv, 
p. 342, pl. xvii, fig. 9. 
1850. Lepa nrneara, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 159. 
1854. Nocona ningeara, J. Morris. Cat. Brit. Foss., ed. 2, p. OA fe 
1868. Leva tineata, 4. Briart and F. L. Cornet. Descript. Mineralog., Géol., 
et Pal. de la Meule de Bracquegnies (Mém. 
Cour. et Mém. des Sav. étrangers, vol. xxxiv), 
p. 63, pl. vi, figs. 8, 9. 
1884, — ~- J. S. Gardner. Quart. Journ. Geol. Soc., vol. xl, p. 186, 
pl. iv, figs. 13-16 (? 14). 
1884. —  scapuHa, Gardner. Ibid., p. 188 (partim), pl. v, figs. 21, 22? 
Non 1837. Nvcura urngara, A. Goldfuss. Petref. Germ., vol. ii, p. 153, pl. exxiv, 
fig. 17 (from the St. Cassian Beds). 
— 1841. — — G. Minster. Petrefactenkunde, pt. iv, p. 83, pl.viil, fig. 9. 
— 1875. Lepa wineara, J. F. Blake. Quart. Journ. Geol. Soc., vol. xxxi, p. 228, 
pl. xii, fig. 12 (from the Kimmeridgian) ; 
vol. xxxvi (1880), p. 235. 
Description.—Shell small, oval, elongate, somewhat compressed, rounded 
anteriorly, pointed posteriorly ; posterior part a little longer than the anterior. 
Ventral margin slightly curved. Umbones not very prominent. Lunule often 
indistinct. Escutcheon lanceolate. Surface ornamented with well-marked con- 
centric ribs, which disappear or become indistinct near the postero-dorsal and 
antero-dorsal extremities: some of the ribs cut the ventral margin obliquely near 
its posterior end. Margins smooth.’ Teeth numerous, slightly bent. 
Measurements : 
(1) (2) (3) 
Length . : LDP eee ae #06. Tmt: 
Height. , ix ee One a Ag: 
Thickness : —. = rar) ary 
Affinities.—In this species the ribs are coarser and fewer, and the posterior 
part of the shell is less sharply pointed and less compressed, than in N. Marie 
1 Gardner says “ the lip is strongly crenated internally.” I have seen no indication of this in 
any specimen. 
