426 Dr. J. Gwyn Jeffreys on Black-Sea Mollusca. 
edulis, have been noticed by Middendorff in his ‘ Malacozoo- 
logia Rossica,’ nor by Weinkauff in the ‘ Nachrichtsblatt der 
deutschen Malakozoologischen Gesellschaft’ for February and 
March 1880. One of the dredgings of Admiral (then Captain) 
Spratt was off Balaclava, in 45 fathoms; and another was 60 
miles south-east of the mouth of the Danube, in 50 fathoms. 
The following list includes a species which I consider new to 
science. 
First Dredging. 
Mytilus edulis, Linné ; drifted. 
Cardium fasciatum, Montagu. 
Scrobicularva alba, W. Wood, var. curta. 
Cerithium pusillum, Jeffreys. 
Cerithium reticulatum, Da Costa. 
Trophon breviatus, Jeffr., sp. n. 
Second Dredging. 
Mytilus phaseolinus, Philippi. 
Cardium fasciatum. 
Scrobicularia alba, var. curta. 
Cerithium pusillum. 
Trophon breviatus. 
Trophon breviatus *, Jeffreys. 
SHELL forming a short spindle, rather thin, opaque and 
lustreless : sculpture, numerous and slight but irregular lon- 
gitudinal striae, which cover every part of the shell; there are 
also several broader and flattened spiral ridges, about 6 on 
the body-whorl, 3 or 4 on the penultimate, 2 on the next, 1 on 
the rest, and none on the two uppermost whorls: colour yel- 
lowish-white: spzre short, ending in a smooth and glossy 
rounded point, which is usually twisted to the left: whorls 6, 
swollen, bluntly angulated above; the last occupies five ninths 
of the spire: suture wide and deep: mouth roundish-oval, ex- ~ 
panded; length five ninths of the spire: canal short, open, 
turning to the left, and terminating in an excavated notch ; 
externally it is marked only by the longitudinal striew, which 
are there close-set and irregular: outer ip projecting, bluntly 
angulated above ; edge sharp; inside or throat quite smooth : 
inner lip thin, reflected: pellar broad, curved and flattened, 
with a sharp edge: operculum yellow, triangular, marked 
with curved striz in the line of growth; nucleus terminal and 
blunt. LL. 0°45, B. 0°225. 
* Shortened. 
