58 BULLETIN OF THE 



the spire entirely immersed and the posterior junction of the outer lip descend- 

 ing upon it in a sort of spiral. The shell is thin, pellucid, and finely closely 

 spirally striate. It differs from that of P. quadrata chiefly by its larger size 

 and the much smaller proportion wrapped in the body whorl. The soft parts, 

 though larger, are remarkably like those of P. quadrata, but in that species the 

 ventricular plates are wanting. In the present species they are present and of 

 large size, the large (right) plate being lozenge-shaped, whitish and slightly 

 concave on the side of insertion, covered with a convex polished nearly smooth 

 brown coating on the interior, which is generally worn away by friction toward 

 the center. The small plates are nearly the shape of half the large one, partly 

 hollow and without granules. They resemble on the whole the plates of 

 P. angulata Jeffreys as figured by Sars (loc. cit., t. xii. fig. 10 d), but are larger, 

 longer, and more pointed at the extremities. The adult shell comprises about 

 two whorls, maximum length 12.0, max. breadth 9.0 mm. The large plate 

 measures about 4.0 X 8-0 mm. The axis of the shell is wound in a wide per- 

 vious spiral, and the body whorl viewed from below extends about half-way 

 across the base from side to side and two thirds the distance from the apex to 

 the front edge. 



Habitat. Station 20, in 220 fms., off Bahia Honda, Cuba; Station 146, in 

 245 fms., sand, near St. Kitts; Station 167, off Guadelupe, in 175 fms., sand; 

 Station 188, off Dominica in 372 fms., sand; Station 192, off Dominica, in 138 

 fms.; Stations 274, 279, 291, and 299, near Barbados, in 118 to 209 fms. 

 Bottom temperatures ranging from 43° to 64° F. 



This seems to be a rather common species from the frequency with which 

 it was taken. It differs entirely from P. sagra Orbigny, and is wider and 

 squarer than P. Candeana Orb., in which moreover the spire is represented as 

 visible for two turns at the apex. 



Philine planata n. s. 



Shell resembling that of P. aperta Linne, but flatter, smaller, more quad- 

 rangular, with a shorter and smaller body whorl, more polished surface, and 

 with an impressed spiral line near the apex which extends to the margin where 

 it marks a slight sinus, behind which the posterior margin is prolonged into a 

 rounded prominent point. The shell is brilliantly polished and smooth except 

 for lines of growth, but near the apex are a few microscopic faint spirals invis- 

 ible without a lens. Ths spire is wholly immersed and makes in all about one 

 and a half turns. The ventricular plates are formed like those of P. infundibu- 

 lum, and not like those of P. aperta. The outer surface of the right plate has 

 two longitudinal blackish lines. The two small plates are somewhat more 

 arched than in P. infundihulum. The inner or triturating surface is similar 

 in both. The length of the largest shell observed is 11.5 and its breadth 

 9.0 mm. 



The soft parts are in general much the same as in P. aperta, but the cephalic 

 lobe extends farther back and the foot is rounder, flatter, and less rolled up at 



