358 JOURNAL OF SCIENCE, 
top and flattened towards the point; on leaving the body it 
retreats at once, forming a shallow, blunt, V-shaped sinus, from 
the lower side of which, with little of angulation, it advances very 
straight to the edge of the canal, whence it slowly curves back- 
ward round the open point of the snout. Inner lip spreads as a 
very porcellaneous glaze; it runs very obliquely to the base of 
the shortish narrow pillar, below which point it is a very little 
hollowed. The point of the pillar is cut off with a very slight 
obliquity, and has a blunt and very slightly twisted edge. 
Operculum small, oval, smooth, with hair-like strize, apex terminal, 
colour pale brownish-yellow, H. o'5., B. 0:23. Penultimate 
whorl, height, o11. Mouth, height ovt., breadth o'r2. 
The blunt apex, the ribs, and coarse spirals of this species 
suggest some faint affinity with the P. nivalis, Lovén, group ; but 
it is very remote. 
PLEUROTOMA (DRILLIA) ULA, Watson, l.c., p. 420. 
St:\169,; July. 10,/1874./.; Lat. 37° «34-.S;; longa 7 Opa oles 
N.E. from New Zealand. 700 fms. grey ooze. Bottom temper- 
ature 40°. 
Shell—Rather short, fusiform, biconical, scalar, angulated, 
obsoletely ribbed, with rather strong spiral threads. The snout 
is rather short, broadish, and lop-sided. Sculpture. Longitu- 
dinals—There are on the last whorl about 18, very oblique, 
curved, narrow, rather obsolete, irregularly arranged riblets, 
parted by wider shallow furrows ; they originate faintly at the 
suture, are strongest and somewhat mucronate at the angulation, 
extend to the lower suture, and appear on the base but not on 
the snout; they are much stronger on the earlier whorls than on 
the last one. There are very many fine hair-like lines of growth. 
Spirals—There are a great many remote hair-like threads; on 
the shoulder below the suture these are fine and closer set than 
on the body and base; the carinal one at the angulation and 
that next below this, especially the first, are strong; they are 
ornamented with close-set, round, minute granules, which swell 
into small prominent tubercles in crossing the riblets ; those on 
the carinal spiral in particular are high, sharp, and horizontally 
elongated. In the interstices of the ribs and spirals, the whole 
surface is microscopically granulated. It is this granulated sur- 
face which gives the peculiar crisp aspect to the texture of the 
shell, from which its name is taken. Colouy semitransparent 
flinty white, with a crisp or slightly frosted aspect. Spive scalar, 
rather stumpily conical, with its profile lines much interrupted 
by the constriction of the sutures. Afex—There are two globose 
embryonic whorls, of which the first is immersed, but scarcely 
flattened down on one side; they are rather remotely, micro- 
scopically, regularly striated. Whorls 5% in all; they are short, 
broad, of slow increase, with a rather long sloping shoulder and 
a sharp carinated angle, below which they are cylindrical, with 
a very slight contraction to the suture; the last is broadest at 
