344 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



few specimens weak traces of the shoulder tubercles can be seen, 

 suggesting a transition to X. validus, which has exactly the same 

 early sculpture; but no evidence of an actual intergradation is at 

 hand. 



Vasum dominicense Gabb Plate XXVII, figs. 4, 5. 



Vasum dominicensis Gabb, Tr. Am. Philos. Soc, xv, 1873, p. 218. 



Closely related to the recent V. capitellum (L.), but the shoulder 

 is less developed. There are eight obtuse, massive folds on the 

 last whorl, the intervals clathrate. The outer lip is rather weakly 

 lirate within and the columella has three rather small plaits. 



Length 60, diam. 37.5 mm. Type, fig. 5. 



Length 32, diam. 19 mm. Fig. 4. 



Type and a smaller shell are no. 2623 A. N. S. P. 



Vasum haitense (Sowerby) 



Turbinclla hnitensis Sowerby, Q. J. Geol. Soc, vi, p. 50. Guppv, Q- J. Geol. 



Soc. xxxii, 1876, p. 523, pi. 29, fig. 3. 

 Vasum haitense Sowb., Gabb, Tr. Am. Philos. Soc. xv, p. 218. 



Twelve specimens. It becomes very large and ponderous. 



Vasum tuberculatum Gabb. Plate XXVII, figs. 2, 3. 



Vasum tuberculatum Gabb, Tr. Am. Philos. Soc, xv. 1873, p. 218. 



This species is very distinct from V. haitense, and in fact from 

 all others known to us. The spire is much higher than in haitense. 

 Seven very large tubercles on the shoulder of the last whorl are bifid 

 at their summits, a swelling being superposed below the crest. The 

 inferior tubercular ridge is somewhat smaller than in haitense, and 

 there are slightly tubercular, very much smaller ridges above and 

 below it. Five weak columellar plaits. 



Length 112, greatest diam. 87 mm. 



Type is no. 2624 A. N. S. P. 



Vasum edificatum (Guppy) 



Turbindlas cdificatus Guppy, Q. J. Gecl. Soc, xxxii, 1876, p. 523, pi. 28, fig. 5- 

 Vasum subcapitellum Heilprin. Trans. Wagner Free Inst. Sci., i, 188, p. 109) 



pi. 15, fig. 44. Dull, same Trans., iii, 1890, p. 99, pi. 4, fig. 12. 

 ? Vasum domitdcense Gabb, var. gurabicum Maury, Bull. Amer. Pal. v, p. 84. 



Vasum subcapitellum, from the Oligocene of Ballast Point, differs 

 only in being somewhat smaller than Santo Domingo specimens. 



The neanic stage is rather profusely spinose. Guppy 's figure 

 shows the much less spinose adult stage. 



Vasum pugnus Pils. and John.s. Plate XXVII, flg. 1. 



Proc. A. N. S. Phila., 1917, p. 167. 



