NO. 22S8. ^rE^Y MOLLUSKS OF THE FAMILY TURRIT I DAE— BALL. 67 



narrower interspaces extending from the succeeding suture to the 

 anterior edge of the anal fasciole and across it as an arcuate thread 

 to the preceding suture; these ribs become more or less obsolete on 

 the last whorl and are feebly if at all produced beyond the periphery ; 

 spiral sculpture between the fasciole and the succeeding suture of five 

 cr six equal and equidistant strong threads with subequal interspaces 

 on the penultimate whorl and about a dozen on the base of the last 

 whorl, with smaller and closer ones on the canal; the angle at the 

 anterior edge of the fasciole is prominent, the threads are hardly 

 swollen when they pass over the ribs ; aperture narrow, the anal sul- 

 cus shallow and wide beginning at the suture ; outer lip thin, sharp ; 

 inner lip erased; pillar and canal straight, the latter distinct but 

 short and deep. Height of shell, 5.5 ; of last whorl, 3.7 ; diameter, 3 

 mm. Cat. No. 122751, U.S.N.M. 



Range. — Station 2787, on the west coast of Patagonia in 61 fathoms, 

 mud, bottom temperature 54° F. U. S. Bureau of Fisheries, 



This shell looks like a small Bela^ but has no operculum. 



MANGILIA ERIOPIS, new species. 



Plate 23, fig. 1. 



Shell small, white, polished, having a nucleus with an oblique 

 smooth small apex and about one whorl, the latter part spirally 

 striated, and about six and a half subsequent whorls; spire acute, 

 slender, the whorls moderately rounded, the suture distinct, not ap- 

 pressed ; spiral sculpture of a few obscure threads on the back of the 

 canal and on the apical Avhorls; axial sculpture of (on the last whorl 

 about 15) sigmoid ribs, most prominent at the shoulder, feeble over 

 the anal fasciole and on the base ; aperture narrowly ovate, anal sulcus 

 shallow and wide, beginning at the suture ; outer lip produced, thin 

 and sharp ; inner lip and pillar with a thin wash of enamel ; pillar 

 straight, attenuated in front, canal short and narrow. Height of 

 shell, 13.5; of last whorl, 7.5; diameter, 5 mm. Cat. No. 216411, 

 U.S.N.M. 



Range. — Forrester Island, southeastern Alaska, collected by G. 

 Willett. 



MANGILIA GRANITICA, new species. 



Shell small, waxen white, darker on the pillar, with two nuclear 

 and about five subsequent whorls; nucleus flat-topped, the first whorl 

 with one strong keel, the second with three, the suture is laid on the 

 si.iterior keel, which is smaller, and in the subsequent whorls the 

 suture is not appressed but distinct; spiral sculpture of on the first 

 two whorls a strong peripheral cord and one thread at the suture, on 

 the third whorl three threads in front of the cord, on the remainder 

 four, on the last whorl the peripheral cord is not prominent but from 

 the anal fasciole to the canal are about 16 strong threads with wider 



