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 incremental 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, 2S; of aperture, 

 14; max. diam. 11.5 mm. 



U. S. 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 Dall, 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. S. S. "Albatross," station 3394, Gulf of Panama, in 511 fathoms, mud, 

 bottom temperature 4r.8 F. U. S. N. Mus. 123,125. Also at station 2792, oflF 

 Manta, Ecuador, in 401 fathoms, mud, temperature 43° F. (types). 



Tliis 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, tliough a poison gland seemed to be present. The liead 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 ? paciiaca Dall, n. sp. 



Piute 13, egure 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 ; 



