72 PROCEEDINGS OF THE NATIONAL MUSEUM. ^ol. 56. 



Height of shell, 11; of last whorl, 7; diameter, 4 mm. Cat. No. 

 150965, U.S.N.M. 

 Range. — Clayoquot, Vancouver Island, to Drakes Bay, California. 



MANGILIA 7 DEJANIRA. new species. 



Plate 20, fig. 12. 



Shell small, brownish, with an acute brown nucleus of four and 

 a half regularly increasing whorls (apparently smooth but slightly 

 eroded), changed abruptly into the sculpture of the five subsequent 

 whorls; axial sculpture of (on the last whorl 10) low rounded ribs 

 with wider interspaces, obsolete on the base and incremental sculpture 

 indicated by the rather distant sharp striae; spiral sculpture of (on 

 the spire two, on the last whorl three) rather prominent nodules on 

 the ribs with no conspicuous cord in the corresponding part of the 

 interspaces; otherwise the spiral sculpture, especially on the latter 

 whorls, comprises sharp narrow grooves with wider flattened inter- 

 spaces which become more cordlike on the earlier whorls and the 

 base ; whorls moderately rounded with no indication of an anal f as- 

 ciole, the suture distinct but not appressed, aperture in the type- 

 specimen elongate ovate with simple pillar and thin sharp outer lip, 

 the canal short, deep, forming a distinct but small siphonal f asciole 

 and slightly recurved. Height of shell, 11 ; of last whorl, 5 ; diameter, 

 4.5 mm. Cat. No. 267724, U.S.N.M. 



Range. — Dredged in Santa Maria Bay, Lower California; Dr. Paul 

 Bartsch. 



This species may prove to be a young Glyphostoma^ but its peculiar 

 incised sculpture will enable it to be distinguished from the other 

 species of the genus. The absence of an anal fasciole, however, 

 would seem to remove it from that group. 



MANGILIA 7 EURTBIA, new species. 



Plate 22, fig. 2. 



Shell small, white, with a very pale yellowish periostracum. a 

 smooth inflated nucleus of a whorl and a half and about four subse- 

 quent whorls; the first normal whorl has a small peripheral keel, 

 the next two have ribs in addition, the last whorl has only spiral 

 sculpture; suture distinct, not appressed, the whorls well rounded 

 with the anal fasciole close to the suture; spiral sculpture at first 

 of one or two strong threads in the space between the keel and the 

 succeeding suture, on the last whorl the keel is reduced to a flattish 

 cord with four others in front of it, with wider interspaces; on the 

 anterior part of the base and on the canal are feebler closer threads; 

 axial sculpture confined to the spire of about a dozen short obliquely 

 protractive riblets, most conspicuous where they cross the ribs and 

 with subequal interspaces ; on the last whorl they disappear ; incre- 



