SCAPHANDRID&. 237 
little developed, anterior, reflexed only over the anterior edges of 
shell (see fig. 10, dorsal, and fig. 11, external view). 
Jaws (fig. 8) composed of little compressed, imbricating pieces. 
Radula with the formula 3.1.8; rachidian tooth somewhat rudi- 
mentary, quadrangular, the cusp small, a little recurved and bi- 
lobed. Inner two laterals on each side of about the same form ; 
the curved cusp bearing very fine denticles along the concave side ; 
third lateral on each side subobsolete, without denticles (fig. 12). 
The gizzard contains three large, brown-blackish, corneous pieces 
(figs. 14, 13). 
Shell white, rather corneous, very hyaline, of an oval-elongated 
form ; on the back of the shell there are five transverse parallel and 
slightly oblique striz in front, and behind there are three similar 
strie. 
See Vol. xiv, p. 278. The species also inhabits the Gulf of Mar- 
seilles, but sparingly. The specific name is preoccupied by Mon- 
tagu, so one of the later names will be substituted. 
Subgenus ALicuLAstruM Pilsbry, 1896. 
=Aliculu EHRENBERG, 1831 (see Vol. xv, pp. 261, 262, 265), not 
Alicula Eichwald, Naturhistorischer Skizze von Lithauen, Volhy- 
nien u. Podolien (Vilna, 1830) p.214, proposed for A. okenti (Ul. ¢. 
p. 214, footnote), A. lichtensteinii and A. volhynica (1. ¢. p. 215). 
Alicula Eichw. has been given precedence over Alicula Ehren- 
berg by Cossmann, who considers it to indicate the same group. 
This, however,isan error. Eichwald’s Alicuda has a projecting spire, 
and is certainly a totally different thing. Eichwald calls it a transi- 
tion from Oliva to Voluta. For Ehrenberg’s group the new name 
given above may be used. 
CiisTaxiIs Cossmann, 1895. 
Ess. Pal. Comp., p. 90. New name for Cryptaxis Jeffreys non 
Lowe, type Cylichna parvula Jeffr. (Vol. xv, p. 2938). 
While possibly distinct, the shell-characters alone are not suffi- 
cient for the generic elevation of this form, which probably belongs 
to either Cylichna or Retusa. 
Genus DIAPHANA Brown (Vol. xv, p. 280). 
D. (?) Fragius Vélain. Vol. xv, pl. 23, fig. 50. 
Shell short and subcylindric, truncate at base, thin, translucent 
and gray; surface ornamented with little longitudinal striz, very 
