430 CRETACEOUS LAMELLIBRANCHIA. 



Description. — Shell small, bean-shaped, convex, considerably inequilateral ; 

 posterior part higher than the anterior part. Anterior and posterior uiai-gins 

 rounded. Postero-dorsal margin .slightly convex. Ventral margin with a slight 

 sinuosity. A rounded carina extends from the umbo towards the postero-ventral 

 extremity, and limits a compressed postero-dorsal area. Umbones broad, close 

 together. 



Measurements : 



Length . . . 8"o mm. Height . . . 4'5 nnn. 



Affinities. — This .species is more elongate and more convex than T./ snbjiliaseu- 

 lina (see below). No specimens having the shell preserved have been found. 



Type. — A specimen which is believed to be the type is in the York Museum. 



Distribution.— y^Yieetow Clay (zones of Belemnites jaculmn and B. brunsvicensis) 

 of Speeton. 



Teluna ? SUBPHASEOLINA {(VOrbi(j)ti/), 1850. Plate LXII, figs. 11, 12. 



[Omitted from Vol. II, p. 177.] 



1846. Lavignon phaseolina, A. d'Orbiijny. Pal. Franc. Terr. Crt't., vol. iii, p. 



407, pi. ccclxxvii, figs. 8 — 10. 

 1850. — SUBPHASEOLINA, iVOrhignij. Prodr. de Pal., vol, ii, p. 136. 



1865. Tellina PHASEOLINA, F. J. I'ictet and G. Campiche. Terr. Crt't. Sle. 



Croix. (Mati'r. Pal. Suisse, ser. 

 4), p. 137, pi. cviii, fij,'. 10. 

 1870. Lavignon subphaseolina, F. StoUczJca. Pala?ont. Indica, C'ret. Fauna 



S. India, vol. iii, p. 111. 

 — Tellina phaseolina, Stoliczka. Ibid., p. 123 (? Peronxa). 



Description. — Shell oval or subquadrate, compressed, considerably inequilateral, 

 posterior jiart higher than the anterior part. Postero-dorsal margin nearly straight ; 

 posterior margin curved ; ventral margin with a shallow sinus due to a depression 

 on the sides of the sliell ; anterior margin rounded. Umbones small, close together ; 

 between the umbones and the postero-ventral extremity is the greatest convexity 

 of the shell. 



Measurements : 



(1) 

 Length 14 . 



Height 10 . 



Thickness ..... — 



(1—3) Gault, Folkestone. 

 Affinities. — The hinge is not shown in any of the English specimens. Pictet 

 and Campiche saw casts of the teeth, and they refer the species without doubt to 



