DALL: MOLLUSCA AND BRACHIOPODA. 291 
-DAPHNELLA Hunps. 
Daphnella (Eubela) imparella Datt, n. sp. 
Plate 2, figure 2. 
Shell small, translucent white, smooth, polished, very thin, with a three-whorled 
yellow nucleus of the “‘ Sinusigera” type, ending abruptly; the form of the shell 
fusoid, whorls gently rounded, with about four whorls following the nucleus, 
marked only with lines of growth, obscure spiral markings, and on the canal a 
few obsolete spiral threads; suture distinct, not marginate ; aperture lunate; anal 
sulcus very wide and shallow, outer lip thin, arcuately protractive ; body smooth ; 
pillar straight, obliquely truncate in front, hardly callous; canal wide, shallow, 
not recurved. Lon. of shell, 12.7; of last whorl, 9.0; of aperture, 7.0; max. 
diam. 5.5 mm. 
U.S. 8S. “ Albatross,” station 3392, Gulf of Panama, on hard bottom, in 1270 
fathoms, bottom temperature 36°.4 F. U.S. N. Mus. 123,114. 
The species wants the sutural margination and beading of Eubela limacina 
Dall, of the Atlantic, and its proportions are different, but in other respects it is 
rather similar. This group has no operculum, 
Daphnella (Surculina) blanda Datt, n. sp. 
Plate 3, figure 1. 
Shell elongate fusiform, thin, slender, of a pale buff color, eroded nucleus, and 
about six subsequent whorls; suture distinct, slightly appressed, whorl in front 
of it minutely arcuately axially wrinkled; nucleus and the following whorl and a 
half eroded, the next two or three whorls faintly axially ribbed with (on the third 
whorl about fifteen) low, rounded, narrow, subequal protractive riblets which on the 
following whorls weaken and disappear; the intervals are wider than the ribs, 
shallow, and crossed by (between the sutures 8-9) low, regular, equal, rounded 
spiral threads, equally distributed and not nodulous, but weaker or absent be- 
tween the suture and shoulder where the ribs originate. On the last whorl the 
spiral sculpture is much the same except that the threads are flattened and strap- 
like and the interspaces more or less channelled and near the canal wider; outer 
lip arcuate, slightly excavated near the suture, protractive below, moderately con- 
stricted on the canal, thin, simple; pillar straight, rapidly attenuated forward, the 
edge gyrate and minutely pervious at the axis; canal long, straight, wide, obliquely 
truncated. Lon. of shell, 26.5; of last whorl, 20.0; of aperture, 16.5; max. 
diam. 8.0 mm. 
U.S. 5S. ‘ Albatross,” station 3366, off Cocos Island, Gulf of Panama, in 1067 
fathoms, ooze, bottom temperature 37° F. U.S. N. Mus. 123,119. 
