1920.J 



NATURAL SCIENCES OF PHILADELPHIA. 



291 



Only one specimen was ol)tained. Its host is unknown. The 

 shell tapers more regularly than any of the examples of aS. deformis 

 seen, and I am inclined to think it a distinct though closely allied 

 subspecies. 



Fig. 1. — a, SUflifer deformis hawniensis; h, c, S. deformis rcmotissimus. 

 Stylifer deformis remotlssimus n. subsp. Fig. l b, c. 



Pearl and Hermes Reef. Collected by Lieut. Munter. 



The shell is thin, white, polished, consisting of a very narrow, 

 slightly curved early stage of about 9 flat whorls, the shell then 

 abruptly enlarging in the next two whorls, after which it approaches 

 a cyUndric form, enlarging slowly to the last whorl, which is a little 

 more dilated. The 5}^ whorls of the second stage of growth are 

 convex, the last whorl rounded below. The columella and parietal 

 wall are heavily calloused. 



Length 9, diameter 3.5 mm. 



As the apex and last half whorl of the largest specimen are broken 

 away, the dimensions given are estimated. A half grown cotype 

 (fig. 1 h) is 4.6 mm. long. 



The subcylindric shape of this species is like one of the specimens 

 in Mr. Pease's sending of Stylifer deformis, bilt none of the latter has 

 a heavy parietal callus. This may, however, be a character of old 

 age. 



Stylifer mittrei Petit. Fig. 2 a, b. 



The shell is ovate with a very small, narrow apical point, white. 

 The attenuate initial portion consists of 4 somewhat convex whorls. 

 It then enlarges abruptly, the 5 to 6 whorls following being quite 

 convex, glossy, smooth, except for very faint lines of growth. The 

 moderately impressed suture is not margined. The aperture is 



