282 PROCEEDINGS OF THE ACADEMY OF [Sept., 



excavated near the anterior extremity ; columella marked by one or 

 two strong oblique columellar folds; parietal wall glazed with a 

 callus which in some forms is quite heavy; anterior fasciole broad 

 and obscured by a callus. 



This genus is proposed for a group of Volutes represented by two 

 species from Goon Creek and a third species from Owl Creek which 

 are characterized by large, inornate shells with expanded bodies and 

 low spires. This group is probably nearer Liopeplum'' than any 

 other described genus but differs from that genus very essentially in 

 the character of the spire, the outline of the body, and further in the 

 obliqueness and number of the columellar plaits. Another closely 

 related group of Volutes in the Upper Cretaceous is represented by 

 the species Melo pyriformis Forbes from the Arrialoor, South India,^ 

 a species which Cossmann has referred to the genus Scaphellay 

 Hyllus callilateris n. sp. PI. XVII, figs. 5, 6. 



Description. — Shell large and subovoid in outline, spire elevated 

 but its height probably less than the length of the aperture ; number 

 of whorls unknown; volutions increasing in size with a fair degree of 

 rapidity; apex broken away, protoconch unknown; sculpture absent, 

 external surface free from ornamentation except incremental lines 

 which show through the glazed surface, especially on the anterior 

 fasciole; suture hidden by callus; body slightly flattened dorso- 

 ventrally, somewhat inflated and sloping gently posteriorly and 

 likewise anteriorly where it merges into a broad curved pillar which 

 is marked by a wide, low anterior fasciole partly hidden by .callus; 

 aperture broad and lenticular, distinctly notched or canaliculate 

 anteriorly but the posterior notch is not well defined; outer lip 

 simple and well rounded; inner lip excavated near the anterior 

 extremity; columella marked by a single strong oblique fold; parietal 

 wall heavily calloused; callus deposited over practically the entire 

 surface of the shell and very conspicuously developed on the side of ' 

 the body opposite the aperture into a broad, thick, well-rounded 

 ridge. 



Dimensions (imperfect individual). — Altitude 97 mm.; length of 

 aperture 67.3 mm.; maximum diameter 58 mm. 



In 1860 Conrad^'' figured a form and referred to it in his index of 



" Dall, W. H., 1890, Trans. Wagner Free Inst. Sci., Vol. Ill, pt. I, p. 73. 



* Stoliczka, F., 1868, Geol. Survey India, Pal. Indica, Cret. Faunas South 

 India, Vol. II, p. 83, PL VI, figs. 9, 9a. 



» Cossmann, M., 1899, Ess. de Pal. Comp. livr., Ill, p. 127. 



10 Conrad. T. A., 1860, Jour. Acad. Nat. Sci. Phila., 2d ser.. Vol. IV, PI. 

 XLVII, fig. 14, p. 298. 



