4 EDGAR A. SMITH. 
shoulder of the whorls into erect hollow spines. Whorls 5, the two apical, forming the 
protoconch (fig. 4b), smooth, globose ; the rest slopingly tabulated above, almost straight 
at the sides, but a little contracted below towards the suture, sculptured between the 
lamellae with fine spiral striee, which are crossed by very fine lines of growth, producing 
a textured appearance. The body-whorl is contracted below the middle and terminates 
in a slender oblique recurved snout. The aperture is elongate-pyriform, with the canal, 
exceeding half the entire length of the shell. Columella contorted, covered with a 
smooth, glossy, pellucid callus. 
Length, 13 millim.; diam., 7 ; aperture and canal, 7 millim. long, 2°50 broad. 
Off Coulman Island, 100 fathoms. 
Only a single specimen of this species was obtained. In general form it is very like 
the var., gunneri of the northern T. clathratus (see Sars, Moll. Reg. Arct. Norvegiz, 
pl. xv., figs. 11, lla). It may be separated on account of its much larger protoconch, 
and more distinct sculpture between the lamellae. The latter are rather more erect and 
spine-like at the upper part of the whorls, and the aperture is entirely devoid of colour. 
THESBIA? INNOCENS. 
(Pl. I. figs. 1-1b.) 
Shell small, moderately elongated, turreted, dirty-whitish within and without, 
rather thin, not glossy, finely, yet distinctly, spirally striated ; whorls 5, considerably 
convex, the first 14 forming the smooth glossy protoconch ; suture oblique, deep ; last 
whorl contracted anteriorly, more closely striated upon the cauda than above ; aperture 
occupying about ? of the entire length of the shell; labrum thin, prominent and curved 
at the middle, broadly and shallowly sinuated above; columella slightly arcuate, 
covered with a thin callosity which is joined to the upper end of the labrum ; 
anterior canal short, rather broad, oblique, scarcely recurved. 
Length, 7°5 millim. ; diam., 3°5; aperture, 3°25 millim. long, 1°5 broad. 
Operculum (fig. 1b) minute, horny, thin, yellowish, roundly ovate, with a sub- 
terminal nucleus and exhibiting lines of growth, and also some radiating lines or striz. 
Hole 12. In 25-30 fathoms; also Hut Point, Feb. 13, 1904. 
The genus, or sub-genus, Thesbia is said to have no operculum, but the present 
species has a very minute one which might easily be overlooked. It agrees, however, 
so closely in other characters with the type of the genus (7. nana Lovén*) that I do 
not feel inclined to separate it from this group only on that account. 
ADMETE DELICATULA. 
(Pl. Ly fige,-6, 5a) 
Shell fusiformly ovate, minutely rimate, very thin, dirty white, ornamented with 
numerous fine thread-like spiral liree, and excessively delicate close-set lines of growth. 
* Forbes and Hanley, Brit. Moll., vol. iv., pl. exii., fig. 8; Jeffreys, Brit. Conch., vol. v., pl. lxxxviii., fig. 4; 
Sars, Moll. Reg. Arct. Norv., pl. xvi., f. 2. 
