166 BYNE: MARINE MOLLUSCA OF TEIGNMOUTH BAY. 
decisive reasons for the change in nomenclature from 
Turritella terebra \..,to Turritella communis Risso. - 
Scalaria clathratula Ad.—A fairly good example from 
. dredged material. 
Odostomia rissoides var. exilis Jeff—With the type from 
under musse:s. 
O. conoidea Broc.—A fine dead example dredged. 
O. conspicua Ald. —A young living example detected amongst 
Odostomia acuta var. umbilicata. 
O. interstincta var. suturalis Phil.—Several dredged alive. 
All the Teignmouth specimens should be referred to this 
variety rather than to the type. 
scalaris Phil.—A few dead specimens in dredged sand. 
pusilla var. minuscula Marsh.—This variety only occurs. 
9900 
nitidissima Mont.—A single specimen from drift. 
mM 
ulima subulata Don.—One adult and two immature living 
examples from dredged ‘material. A living specimen 
trawled. 
Cerithiopsis Barleei Jeff.—A fine living example was 
dredged in Sept. 1894. 
The shell has been carefully compared with one of the 
original specimens in Mr. Jordan’s collection, and its identity 
has been confirmed by our British authority upon the group, the 
Rev. R. Boog Watson, whose valuable paper ‘The Cerithiop- 
sides from the Eastern side of the North Atlantic.’ ‘Journ. 
Linn. Soc.’, vol. 19, should be consulted by all who wish to 
understand our species of this rather difficult genus. Jeffreys’ 
description is decidedly misleading. He describes the sculpture 
as resembling that of C. fubercularis but without any basal 
keel. In the last named species he remarks the presence of two 
basal keels, one below the periphery, and one round the canal. 
It is the latter which is wanting in Cerzthiopsis Barleet. Perhaps 
it may not be altogether out of place here to note that the 
colouration is peculiar, sometimes cream or almost white but 
J.C., viii., Jan., 1896, 
