DALL: MOLLUSCA AND BRACHIOPODA. 269 
surface a rough appearance; aperture short, anal sulcus shallow and feeble; 
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. 8. 8. “ Albatross,” station 3392, Gulf of Panama, in 1270 fathoms, hard 
bottom, temperature 36°.4 F. U.S. N. Mus. 123,129. 
Gemmula serilla Datt, 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 
intercalary 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. 5. “ Albatross,” station 3392, Gulf of Panama, in 1270 fathoms, hard 
bottom, temperature 36°.4 F. U.S. N. Mus. 123,123. 
The shell described appears to be not quite adult. 
Leucosyrinx erosina Datt, 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 protractive, wavelike axial ribs, which only reach the suture in front of 
them in the earlier whorls, falling short of it in the later ones; other axial sculp- 
ture consists of rather irregular, more or less prominent incremental lines ; spiral 
sculpture consists of three or more somewhat obscure incised lines over the 
fasciole; on the basal side of the whorl are numerous rather distant, distinct 
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 
