3° Bulletin 29 194 



the whorl. In the later whorls of large specimens the second 

 band becomes more or less obsolete and the sulcus then appears 

 to divide the whorl into unequal parts, which was the origin of 

 the specific name. The entire shell is sculptured by very fine 

 transverse riblets which are oblique posteriorly and become ar- 

 cuate anteriorly on traversing each whorl. Young shells show 

 fine spiral striae which are later obsolete. 



As noted under T. bipartita, Sowerby by some error de- 

 scribes the columella of incequalis as biplicate and that of bipar- 

 tita as smooth. These remarks were apparently transposed since 

 bipartita is biplicate, and incequalis appears smooth when the shell 

 is perfect, but when the outer lip is broken away one distinct 

 terminal plication is revealed. Columella short, with a slender, 

 external keel. Length of medium sized shell of which the early 

 whorls are lost 60 mm., greatest diameter 12, number of whorls 

 included 17. 



This species is closely related to T. sulcifera, which it re- 

 sembles in the style of sculpture, but it differs in retaining its 

 slender form throughout life and its sculpture does not become 

 obsolete. 



Guppy reported T. incequalis fromCumana (Venezuela), and 

 small specimens from Jamaica. Dall also cites it from the Bow- 

 den beds, Jamaica. 



Localities. — (Exp'd '16) Zones E and D, Rio Gurabo at 

 Los Quemados. 



Terebra haitensis Dall 

 Plate 4, Figure 3 

 Terebra haitensis Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, p. 35, 



1895. 

 Terebra {Hastula) haitensis Dall, Trans, Wagner Inst. Sci., vol. 3, pt. 



6, pi. 59. %• 31. J 9°3- 



This species very closely resembles T. incequalis, from which 



it may be differentiated by its bolder and less regular sculpture. 



Our figure shows the single, strong plication on the columella 



