38 R. BULLEN NEWTON on 



umbilical cavity. Notwithstanding these distinctions it appears to be more 

 closely related to American forms than to species found in the European 

 Eocene. 



Moreover, in a general way, the African shell exhibits a resemblance to 

 Pseudoliva perspectiva, as figured by Gabb 1 and more recently by 

 M. Cossmann, 2 who regards it as Buccinorbis, from the Eocene deposits of 

 Texas and Mississippi (Jackson), although its more produced spire, more 

 prominent sutural shelf, and absence of striations on the internal surface of 

 the labrum, are details tending to separate the two species. According to 

 M. Cossmann, Buccinorbis occurs in the Indian Cretaceous (Senonian), in 

 the Eocene of the United States, as also in the Miocene (formerly referred 

 to the Eocene) of Australia. 



OCCURRENCE. Cuttings Nos. i, 5, 6, 10, 11, 12, 13, 15. 

 COLLECTORS. Sir F. Lugard ; Mr. Kitson. 



Liomesus afrioanus, sp. nov. 



PLATE 3, figs. 20, 21. 



DESCRIPTION. Shell small, ovato-conical, moderately ventricose ; spire 

 short, conoidal, comprising 5^ whorls, canaliculate at the suture, protoconch 

 with 2j smooth, depresso-convex whorls, obtusely apexed ; body-whorl 

 elongately oval, moderately inflated, 3 times the length of the spire ; labrum 

 arched, slightly excavated anteriorly, interior covered with microscopically fine 

 horizontal striations ; aperture narrowly sub-crescentic, contracted below into 

 a short recurved, well-notched canal ; columella excavated in the centre, with 

 slight callosity, spirally striated, uniplicate below, funiculate, and twisted at 

 the base ; surface, excluding the protoconch, exhibiting a pair of regularly 

 parallel, spiral striations immediately in front of the suture with deeply 

 indented grooves, beyond which anteriorly the whorls are ornamented with 

 spiral striations of more or less obsolete character, while a series of strong, 

 equi-distant, obliquely spiral ridges cover the basal half of the shell to its 



1 Journ. Acad. Nat. Sci. Philadelphia, 1860, N. Ser., Vol. 4, p. 381, pi. 67, fig. 29. 



2 Essais de Paleoconchologie Comparee, 1901, part 4, pi. 8, figs. 19, 20, p. 193. 



