DALL: MOLLUSCA AND BRACHIOPODA. 285 
west longitude 126° 57; in 2368 fathoms, ooze, bottom temperature 349.6 F. 
U. S. N. Mus. 110,751. 
The animal has a distinct suboylindrical muzzle, slightly expanded distally, into 
Which the proboscis is withdrawn ; the tentacles are rather posterior, small, short, 
and subeylindric; there are no eyes and no opereulum. The foot is short and 
blunt behind, double edged at the front margin whieh is straight; the verge is 
small, coiled in a loose turn and laid back, the extremity with a lateral point; the 
siphon is thick and separate from the mantle-edge, without appendages ; there is a 
moderately long retractile proboscis and a poison gland. The teeth of the radula 
are very like those of Pleurotomella packardi as figured by Verrill, there are two 
tows of about forty teeth each. The exterior of the animal is whitish throughout. 
Pleurotomella (Phymorhynchus?) clarinda Darr, n. sp. 
Plate 1, figure 3. 
Shell white, with a pale yellowish periostracum, thin, fusiform, six whorled; 
Whorls rounded, flattened a little over the anal fasciole in front of the suture, 
which is very distinct but not channelled; nuclear whorls eroded ; subsequent, 
whorls, with between the suture and the shoulder five or six fine, sharp, spiral 
threads with wider interspaces, which are not beaded by the concavely arcuate 
growth lines which are prominent on the fasciole; at the shoulder is a weak 
Spiral ridge, followed by five stronger ones, subequal and equidistant with wider 
interspaces; on a sixth similar ridge the suture is wound, followed by, on the 
base, about thirty similar but less prominent ridges which gradually diminish in 
Size and strength, and approximate more closely to cach other until the canal is 
reached ; over all these ridges and interspaces fine sharp threads run spirally, as 
9n the fasciole and are perhaps a little more prominent on the ridges, where they 
are rendered more or less scabrous by the elevated lines of growth; outer lip thin 
with a shallow rounded excavation, near the suture, which forms the anal sulcus; 
body polished, with the spiral sculpture erased; pillar thin, gyrate, pervious, 
white, with a slightly thickened edge ; canal short, wide, slightly recurved. Lon, 
89 ; last whorl, 30; aperture, 22; max. diam. 18 mm. 
U. 8. S. “ Albatross,” station 3381, east of Malpelo Island, Panama Bay, in 
1772 fathoms, mud, bottom temperature 359.8 F. U. S. N. Mus. 123,097. 
The form and sculpture of this species have a general resemblance to those of 
the preceding two species, although the color is wholly different and in the 
absence of the soft parts it is provisionally placed. with them. 
MANGILIA Risso. 
Mangilia movilla Darr, n. sp. 
Plate 14, figure 6. 
Shell small, thin, white, fusiform, with about flve whorls beside the (eroded) 
nucleus; suture distinct, slightly appressed ; anal fasciole narrow, nearly smooth 
