228 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



COLUS (LATISIPHO) LEPIDUS, new species. 



Shell very thin, with a strong, smooth, yellowish-brown periostra- 

 cum which in drying comes away from or cracks the thin calcareous 

 portion of the shell; whorls six without the (deficient) nucleus, mod- 

 erately inflated, with the appressed suture somewhat constricted; 

 in front of the suture there are whitish radiating ill-defined patches 

 which in some specimens might almost attain to something like a 

 color pattern; the apical whorls of the best preserved specimen are 

 decorticated and slightly eroded, but bear the remains of about seven 

 oblique short plications which apparently did not reach the sutures; 

 the later three whorls are smooth, except for a few very faint irreg- 

 ular indications of spiral threads; the aperture is short, roughly 

 semilunate, with the outer lip slightly expanded and reflected; the 

 pillar is straight, white and somewhat callous; the color within the 

 aperture livid purplish; the canal short, slightly twisted, with no 

 marked siphonal fasciole. Length of shell 40, of last whorl 25, of 

 aperture 15 ; maximum diameter of last whorl 17 mm. Another 

 specimen increases more rapidly in diameter, that of the -last whorl 

 measuring 20 mm. 



Habitat. — Iterup Island of the Kuril group. Hirase collection. 



There is nothing on the American coast that resembles this species, 

 and the color painting is unique among the species of the region. 

 Unfortunately both the specimens are more or less broken and 

 eroded. 



COLUS (LIMATOFUSUS) TAHWITANUS, new species. 



Shell small, buccinoid, with about six whorls; nucleus eroded, 

 suture deep, not appressed; whorls well rounded; sculpture of fine 

 even uniform grooves with wider flat interspaces over the whole 

 shell; periostracum dull, olivaceous; interior white, outer lip re- 

 flected, arcuate ; pillar and body erased, axis twisted, almost pervious, 

 canal very short and strongly recurved. Height 33; max. diameter 

 17 mm. 



Habitat.— OS. Tahwit Head, Washington, in 178 fathoms, mud. 

 U. S. Nat. Mus. Cat. No. 122632. 



SEARLESIA CONSTRICTA, new species. 



Shell dark purplish brown, strongly constricted and appressed at 

 the suture, rude and with no visible periostracum, with about six 

 prominently rounded whorls without the (decollate) nucleus; axial 

 sculpture of (on the penultimate whorl 12) prominent nearly straight 

 rounded riblets which become obsolete toward the sutures and on the 

 last half of the last whorl ; spiral sculpture on the earlier whorls of 

 strong rounded threads overrunning the plications without nodosi- 

 ties, and alternated with one or two intercalary smaller threads all 



