Mediterranean Mollusca. 333) 
Three specimens. Also from the ‘ Porcupine’ expedition 
of 1870, off the coast of Portugal in 795-994 fms., and in 
the Mediterranean in 1415-1456 fms. 
Defrancia tenella*, Jeftr. 
SHELL oval, tapering at first towards the apex, but becom- 
ing disproportionately broad towards the base, very thin and 
fragile, of a dull hue, and semitransparent: sculpture none, 
except a few slight and indistinct spiral striee and occasional 
lines of growth; the top whorls are minutely and closely re- 
ticulated by curved striz, as in other species of the present 
genus: epidermis not perceptible: colowr, for the most part 
whitish, the first four whorls being reddish-brown: spire 
short, sharply pointed: whorls 7, convex; the last is twice 
the size of all the other whorls put together; apex conical: 
suture deep, not concave or sunken: mouth oval, flexuous: 
canal short and wide: outer lip curved and having a sharp 
edge: jissure remarkably wide and deep, forming an oblique 
eurve: inner lip glazed: pillar long, and sloping towards the 
canal. L. 0°2, B. 0°15. 
From 1963 fms. 
A single and perfect specimen of this beautiful little shell. 
It is allied to a species which I have named exquistta, dredged 
in the ‘ Porcupine’ and ‘ Travailleur’ expeditions off the 
western coast of Lusitania, in about 1000 fms.; but the last- 
named species is distinctly cancellated, and has a much nar- 
rower and longer fissure. 
Defrancia convexat, Jeftr. 
SHELL spindle-shaped, rather thin, lustreless, and opaque : 
sculpture numerous, slight, thread-like and regular spiral striae, 
which are alternately larger and smaller; those on the base 
are more close-set and finer; there are no longitudinal ribs ; 
but the upper whorls have a few knob-like prominences in the 
middle, which may be the remains or traces of ribs, and they 
give a bluntly angular appearance to those whorls ; the lines 
of growth are flexuous; the fissural groove, which lies imme- 
diately below the suture, is somewhat excavated, and is marked 
by numerous and regular curved strie: colowr whitish : whorls 
8-10, convex: sutwre deep: mouth oblong: canal of mode- 
rate length: pillar-lip smooth and enamelled. LL. 0:85, 
B. 0°35. 
From 217 fms. 
* Delicate. + Rounded. 
Ann. & Mag. N. Hist. Ser. 5. Vol. x. 3 
