270 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
incised lines, the interspaces between which are faintly beaded or reticulated by 
the short segments they intercept of the mcremental lines; traces of analogous 
sculpture can be observed with a lens also on the base ; aperture semilunar ; outer 
lip thin, sharp, with a shallow anal sulcus adjacent to the suture; body with the 
sculpture erased, white, polished ; pillar solid, white, twisted, obliquely truncate in 
front; canal wide, short, recurved and flaring anteriorly; operculum rounded, 
triangular with an apical nucleus, pale brownish. Lon. of shell, 28; of aperture, 
14; max. diam. 11.5 mm. 
U. 8. S. “ Albatross,” station 3360, Gulf of Panama, in 1672 fathoms, sand, 
bottom temperature 42°F. U.S. N. Mus. 123,106. 
The specimens, like most of those from these depths, are badly eroded. 
Leucosyrinx ? clionella Datt, n. sp. 
Plate 14, figure 3. 
Shell large, solid, chalky, with a rather thick olivaceous periostracum, and 
about seven whorls, the apex being eroded ; spire much longer than the aperture, 
subfusiform, with whorls appressed at and constricted in front of the suture; the 
constriction corresponds to the anal fasciole behind which the margin of the 
whorl has the aspect of a thickened band; axial sculpture, beside incremental lines, 
consisting of twelve low, rounded, strong, slightly protractive ribs with subequal 
interspaces, strongest just in front of the fasciole, and, on the last whorl becoming 
obsolete on the base; spiral sculpture of numerous obsolete rather close spiral 
threads, irregularly disposed, stronger and much more distant on the base, but 
always obscure; aperture narrowly lunate, the anal sulcus conspicuous but shal- 
low; the outer lip simple; body with a moderately thick, smooth callus extended 
onto the short, straight pillar, which is obliquely attenuated in front, with a wide, 
short, shallow canal. Lon. of five (decollate) whorls, 35.0; of last whorl, 22.5; 
of aperture, 15; max. diam., 12.5 mm. 
U. 8. 8. ‘ Albatross,” station 3394, Gulf of Panama, in 511 fathoms, mud, 
bottom temperature 41°.8 F. U.S. N. Mus. 123,125. Also at station 2792, off 
Manta, Ecuador, in 401 fathoms, mud, temperature 43° F. (types). 
This species has the thick olivaceous periostracum of a Clionella, as well as the 
sculpture of the typical Clionella, but a careful examination failed to discover any 
radula, though a poison gland seemed to be present. The head was that of typi- 
cal Turris, with no muzzle, short tentacles with prominent eyes near their tips; 
the operculum oval, concentric, with the nucleus not lateral but near the smaller 
end, just within the margin of the apex. 
Leucosyrinx ? pacifica Datt, n. sp. 
Plate 12, figure 3. 
Shell small, delicate, white with a pale yellowish periostracum, with at least six 
whorls beside the (lost) nucleus; spire acute, slender, longer than the aperture ; 
