MODIOLA. 101 
1850. Muiryius unpuxarvs, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 119. 
1854. Cypricarpia unpuLata, J. Morris. Cat. Brit. Foss., ed. 2, p. 199. 
1867. Myrinus (Mopioia) unpuxnatus, F. J. Pictet and G. Campiche. Foss. 
Terr. Crét. Ste. Croix (Matér. Pal. 
Suisse, ser. 4), p. 508. 
1871. Moprona unputata, I. Stoliczka. Paleont. Indica, Cret. Fauna 8. India, 
vol. iii, p. 372. 
Description.—Shell moderately elongate, compressed, enlarged posteriorly. 
Dorsal margin nearly straight; ventral oblique ; anterior rounded. Umbones not 
terminal, with a sharply marked curving carina extending to the postero-ventral 
extremity. From the dorsal margin broad ribs start and are directed posteriorly, 
afterwards curving to join the cara, where they end. Ventral to the carina the 
shell is marked by fine lines only. 
Measurements : 
Leneth . ; ' , é ; : ; 33 mm. 
Height (at the posterior end). F : : se Mlle ene 
Affinities —This is distinguished from M. flugellifera, Forbes, and M. Gillicroni 
(Pictet and Campiche) by the shorter shell, the carma, the small curvature of the 
ribs, and the absence of bifurcation in them. 
The generic position of this species cannot be stated with certainty, since the 
type specimen is the only example seen and the interior is unknown. 
T'ype.—In the Museum of the Geological Society of London (No. 2088). 
Distribution.—Atherfield Clay of Atherfield. 
Sub-genus—Bracuypontes, Swainson, 1840. 
(‘ Treatise on Malacology,’ p. 384.) 
Mopiota (Bracuyponres) Guerancert ? (’Orligny), 1844. Plate XVIT, figs. 4, 
a a—e. 
1844. Myrinus Gurrancert, A. d’Orbigny. Pal. Franc. Terr. Crét., vol. iii, p. 
282, pl. ecexli, figs. 7—9. 
1850. Miryius — @’Orbigny. Prodr. de Pal., vol. ii, p. 166. 
1862. Bracnypontes Gurrancert, J. G. Chenu. Manuel de Conchyl., vol. ii, 
p. 154, fig. 762. 
1867. Myrinus Guerancert, F. J. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Matér. Pal. Suisse, ser. 4), p. 509. 
1867. — — EB. Guéranger. Album Paldont. de la Sarthe, p. 17, 
pl. xxii, fig. 3. 
1871. Moproua GuErancenrt, I’ Stoliczka. Paleont. Indica, Cret. Fauna 8. India, 
vol. iii, p. 373 (Brachydontes). 
