296 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
occasional finer intercalary threads; these are crossed by (on the last whorl about 
thirteen) rather stout, rounded ribs, strongest at the shoulder, obsolete beyond the 
periphery, and not reaching the suture behind them; aperture rather long, outer 
lip simple, smooth, not reflected or lirate; pillar rather straight, with three strong 
plaits; canal shallow, wide, pointed, making no perceptible fasciole ; umbilicus 
none; body with a thin wash of callus. Height of shell, 43; of last whorl, 33; 
of aperture, 25; width of last whorl, 21 mm. 
U. S. S. “ Albatross,” station 3354, in 322 fathoms, green mud, Gulf of 
Panama, bottom temperature 54°.1 F. U.S. N. Mus. 122,995. 
This species has much the look of a gigantic Admete, but without the arched 
pillar. Most of the specimens were eroded, and the species has a genuine abyssal 
aspect. 
Cancellaria (Merica?) microsoma Datt, n. sp. 
Plate 11, figure 10. 
Shell small, thin, covered with a pale brownish periostracum, with about five 
tabulate whorls beside the (lost) nucleus; suture distinct, not channelled; whorl 
in front of it flattened, beyond the keel at the shoulder moderately rounded; axial 
sculpture of lines of growth which are at intervals so prominent as to suggest 
faint ribs; spiral sculpture comprising a marked keel at the shoulder, minutely 
undulate by the axial riblets, and followed by a wide interval; about eight less 
prominent spiral threads, separated by successively narrower intervals with micro- 
scopic intercalary threads, covering the whole base; aperture ovate, outer lip thin, 
simple, sharp; body smooth; pillar straight, short, thin, with two plaits, the anterior 
of which forms the edge of the columella; anterior part of aperture with a distinct, 
but not deep, rounded notch. Lon. of shell, 3.5; of last whorl, 2.5; of aperture, 
1.7; max. diam. 1.8 mm. 
U.S. 8. “Albatross,” station 3418, off Acapulco, Mexico, in 660 fathoms, 
sand, bottom temperature 39° F. U.S. N. Mus. 122,997. 
This small species might be referred to Admete were it not for the absence of 
the concave arcuation of the pillar which is characteristic of that genus, and the 
presence of a small umbilical chink. 
Cancellaria (Admete?) californica Datu, n. sp. 
Plate 4, figure 4. 
Shell thin, turrited, with five whorls beside the nucleus, white, with a pale, 
olivaceous periostracum ; nucleus blunt, turgid, of about a whorl and a half, smooth 
but not polished; subsequent whorls with a prominent angular shoulder, above 
which the whorl is tabulate, the angulation becoming obsolete in the last whorl of 
the adult shell; in the early whorls the space between the angle and the suture be- 
hind it is nearly smooth and flat, later it has faint spiral threads and becomes more 
