12 PROCEEDINGS OF THE ACADEMY OF [Jan., 



of numerous longitudinal ribs slightly narrower than their intervals, 

 and about 13 in number on the last whorl. These are crossed by 

 spiral cords, narrower than their intervals, of which there are 6 on the 

 last whorl, followed by a costate space, as though a cord had been 

 omitted, and then 4 more l^eaded, oblique cords on the narrow, lower 

 part of the whorl. Apex broken off, 4h whorls remaining, the last 

 with a thick varix behind the outer lip. Aperture narrow with two 

 low teeth within the outer lip; anal sinus deep and rounded. 



Length 4, diam. 1.9 mm. 



Hahajima, Ogasawara. Types No. 86.125. A. X. S. P., from No. 

 1,384 of ^Ir. Hirase's collection. 



Clathurella lischkeana n. sp. PI. II, figs. 14, 14a. 



Shell turrite with rather Avide spire, solid and strong, orange-colored, 

 with a black band below the suture terminating behind the lip-varix. 

 and an ill-defined brown band below the periphery. There is also a 

 black spot on each side of both the anal and the siphonal sinus. Sculp- 

 ture of strong, rounded longitudinal ribs about as wide as their con- 

 cave intervals, strongest on the periphery and above, diminishing 

 rapidly on the contracting base, and 9 in number on the last whorl, 

 the last one much higher, more prominent and longer below, forming 

 the lip-varix. Rather coarse spiral cords pass over these ribs and 

 their intervals, 4 or 5 of them visible on the penultimate whorl. 

 Wliorls about 6 besides the nucleus, which is broken from the speci- 

 mens before me. They are convex and separated by a deep suture. 

 Aperture small, widest in the middle, with a deep rounded sinus above, 

 which is cut into the thick liiD-^'arix a short distance below the suture. 

 The outer lip has a large black-brown spot within below the sinus and 

 another near the base, and there are several (usually 3) low teeth 

 within. 



Length 5.8, diam 2.5 mm. 



Hahajima, Ogasawara. Types No. 85,957, A. N. S. P.. from No. 

 1,388 of Mr. Hirase's collection. 



This little orange-and-black species resembles Reeve's figure of his 

 Pleurotoma nassoides, but it is only half the size of that, and is a con- 

 spicuously thick and solid shell, not, ''thin as though pellucid" or 

 "semitransparent,"' as Reeve states of his nassoides. 



MITRID^. 



Mitra Mrasei n. sp. PI. Ill, figs. 21, 2la. 



Shell thick-fusiform, solid, lusterless, or with two broad spiral 

 bands and some longitudinal streaks of rose, the paler ground-color 



