320 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



peculiar, consisting of numerous crenulated grooves with much 

 wider slightly concave interspaces disposed without regularity but 

 on the last whorl numbering over 30, the interspaces widest near the 

 periphery; the cremdation of the grooves is probably due to in- 

 cremental lines not elsewhere especially noticeable; aperture 

 elongate, outer lip (immature) thin, sharp; body and pillar erased; 

 canal rather long and recurved: axis pervious; operculum thin, the 

 nucleus apical, somewhat curved to the left; height of shell, 16; 

 of last whorl, 12; diameter, 8 mm. U. S. Nat. Mus. Cat. No. 213338. 



Type-localiti/.—U. S. Fish Commission station 3346, off Tillamook 

 Bay, Oregon, in 786 fathoms, ooze; bottom temperature, 37.3° F. 



The sculpture is different from that of any other of the group 

 I have been able to examine. 



AULACOFUSUS ( LIMATOFUSUS) SEVEKINUS, new species. 



Shell small, white, covered ^A'ith a straw-colored periostracum, 

 with about six rounded v/horls, the apex eroded, the suture distinct, 

 not appressed; axial sculpture of obscure incremental lines; spiral 

 sculpture of slightly irregular flattish cords separated by narrower 

 channeled grooves; on the penultimate wliorl there are 15 to 17 

 of these cords; beside these the surface is profusely scored with 

 incised, more or less oblique, sometimes divaricate grooves, which I 

 take to be abnormal; aperture wide, outer lip convexly arcuate, 

 slightly expanded and thickened; inner lip v-'ith a layer of white 

 enamel, piUar short; canal very short, wide, deep, recurved; operculum 

 normal, dark brown; height of shell, 33 ; of last whorl, 25; of aperture, 

 17; diameter, 18 mm. U. S. Nat. Mus. Cat. No. 225225. 



Type-locality. — U. S. Fish Commission station 3669, Bay of 

 Monterey, California, in 278 fathoms, sand; bottom temperature, 

 42.7° F.' 



AULACOFUSUS (LIMATOFUSUS) HAUMERIS, new species. 



Shell small, whitish with a yellow-brown periostracum and five 

 whorls, including a swollen subglobidar nucleus, spire otherwise 

 rather acute, the whorls moderately rounded; suture distinct, not 

 appressed; spiral sculpture of numerous fine shallow squarish grooves, 

 separated by wider flattish interspaces, these covering the whole 

 surface; axial sculpture of famt incremental lines; aperture ovate, 

 outer lip thin, simple, body erased, pillar short and twisted; canal 

 short, wide, recurs-ed; height of shell, 21 ; of last whorl, 15; of aperture, 

 11; diameter, 10 mm. U. S. Nat. Mus. Cat. No. 207192. 



Type-locality.— U. S. Fish Commission station 4248, in Eastern 

 Passage, near the Stikine River, southeastern Alaska, in about 70 

 fathoms, mud; bottom temperature, 42.8° F. 



The specimen may not be completely adult. 



