DALL: MOLLUSCA AND BRACHIOPODA. 269 
surface a rough appearance; aperture short, anal suleus shallow and fecble; 
outer lip sharp, thin, simple ; body with the sculpture erased; pillar smooth 
Short, obliquely attenuated, twisted ; canal wide, short, funicular, slightly recurved, 
Lon. of (decollate) shell, 8.5; of last whorl, 6.0; of aperture, 4.0; max. diam. 
4.5 mm. 
U. S. 8. “ Albatross,” station 3392, Gulf of Panama, in 1970 fathoms, hard 
bottom, temperature 369.4 F. U.S. N. Mus. 193,199. 
Gemmula serilla Darr, n. sp. 
Plate 13, figure 6. 
Shell small, fusiform, sharply sculptured, white with an olivaceous periostra- 
cum, with about four whorls exclusive of the decollate apex; suture distinct not 
appressed, whorl in front of it descending flatly to a nearly peripheral keel, the 
flattened portion corresponding to the anal fasciole ; fasciole spirally sculptured by 
four or five very fine, equidistant, simple, similar threads, crossed by (on the last 
Whorl about twenty-five) elevated, sharp, arcuate, lamellar riblets, which are 
Continued over the whorl with wider interspaces to the anterior part of the base; 
the shoulder keel is minutely duplex, narrow, subspinose where it crosses the 
ribs, and more prominent than they; in front of it are about twelve strong 
rounded primary spiral threads, with wider interspaces, each containing a finer 
interealary thread, the whole extending to the end of the canal ; aperture narrow, 
anal suleus wide, shallow ; outer lip sharp, simple; body smooth, pillar straight, 
obliquely attenuated in front; canal narrow, straight, rather produced. Lon. of 
(decollate) shell, 8.3; of last whorl, 6.0; of aperture, 4.5; max. diam. 4.0 mm. 
U. 8. S. “ Albatross,” station 3399, Gulf of Panama, in 1270 fathoms, hard 
bottom, temperature 369.4 F. U. S. N. Mus. 123,193. 
The shell described appears to be not quite adult. 
Leucosyrinx erosina Darr, n. sp. 
Plate 2, figure 1. 
Shell fusiform, white, with an olive-gray more or less dehiscent dull periostra- 
Cum; nucleus eroded, subsequent whorls about seven; spire without the nucleus 
about equal in length to the aperture; suture appressed; a little in front of it is 
the anal fasciole, which is narrow, slightly constricted, and ill defined; in front of 
it and forming the shoulder of the whorl is a series of about twelve round-topped, 
Slightly protraetive, wavelike axial ribs, whieh only reach the suture in front of 
them in the earlier whorls, falling short of it in the later ones ; other axial seulp- 
ture consists of rather irregular, more or less prominent ineremental lines ; spiral 
Sculpture consists of three or more somewhat obscure incised lines over the 
faseiole ; on the basal side of the whorl are numerous rather distant, distinet 
Spiral striae, subequal and nearly equidistant, the interspaces a little elevated 
and, on the canal, becoming threads; in addition to these there are on the 
middle of the whorls a quantity of irregular, oblique, somewhat vermicular, short 
