734 CRETACEOUS PAEEONTOLOGY. 



1892. Bripachya ? paulidinaformis Whitf., Pal. N. ]., vol. 2 



(Monog. U. S. G. S., vol. 18), p. 77, pi. 3, figs. 16-17. 

 1892. Pyrifwsus cimeus Whitf., Pal. N. J., vol. 2 (Monog. U. 



S. G. S., vol. 18), p. 51, pi. 4, figs. 9-11. 

 1905. PyrifU'STis cuneus Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 24. 

 1905. Pyrifiisus mullicaensis Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 24. 



Description. — Shell subfusiform, with about five volutions, of 

 medium size or rather large, length above and below the point 

 of greatest diameter nearly equal, spire obtusely conical with an 

 apical angle of about 50° ; the dimensions O'f a nearly complete 

 internal casts are: total height, 36 mm.; greatest diameter, 20.5 

 mm.; height of spire, 13 mm.; height of aperture, 23 mm.; 

 width of aperture, 9.5 mm. Volutio-ns ventricose, with deep 

 sutures, the outer one subangular on the periphery with the lower 

 part somewhat attenuated; aperture large, elongate, subelliptical, 

 more rounded externally than on the inner side; columellar 

 cavity in the casts broad. Surface o-f the casts marked by numer- 

 ous obliquely vertical folds which are strongest on the largest 

 portion of the volutions; other surface characters unknown. 



Remarks. — Whitfield referred his specimens toi this species 

 with a query, but there is no doubt as toi the identity of the 

 examples which he illustrates with Gabb's type of the species. 

 In addition tO' the specimens which Whitfield has identified as 

 members of this species, the example which he has described 

 as Neptunella mullicaensis is only an exceptionally large indi- 

 vidual of P. mullicaensis, as has been suggested by Johnson. 

 Also the shells which the same author has described as P. cuiieiis 

 are only somewhat more immature individuals of P. mullicaensis, 

 and the same can be said of his Bripachys ? paulidinaformis, 

 although in this latter shell the vertical nodes are somewhat less 

 strongly developed than usual. The different individuals vary 

 considerably in the strength and size of their vertical nodes, but 

 no' specific characters can be drawn on these grounds since all 

 intergradations can be selected from a large number of indi- 



