46 
PKOCEEDINGS OF THE SCIENTIFIC ASSOCIATION, 
The following donation was announced. — “Journal of 
the Society of Arts” — Nos. 1048 — 1060 —from the Society. 
The following communication was read : — 
ON THE WESTINJDIAN RISSOINAE. 
By Henry Krebs, Corresponding Member . 
( Abridged.) 
The following thirty-one species of Rissoina have been 
attributed to the Westindian Province : — 
Rissoina affinis Adams 
albida Adams 
browniana Orb. 
bryenea Mont. 
cancellata Fhil. 
Candida Brown 
catesbyana Orb . 
chesneli Mich. 
decussata Mont. 
dubiosa Adams 
dunkeri Phil. 
elegans Orb. 
elegantissima Orb. 
firmata Adams 
fortis Adams 
The genus has been treat 
Schwartz von Mohrenstern in 
Rissoina janus Adams 
laevigata Adams 
laevissima Adams 
multicostata Adams 
philippiana Pfeiff. 
princeps Adams 
pulchra Adams 
reticulata Soio. 
sagraiana Orb. 
sealarella Adams 
scalariformis Adams 
scalarioides Adams 
sloaneana Orb. 
striatocostata Orb. 
striosa Adams 
vitrea Adams 
1 with great care by Gustav 
his work “ TJeber die Eamilie 
der Rissoiden und ins besonders die Gattiiiig Rissoina” 
(Yienna 1860—1 1 plates). He divides the genus into the 
following groups : 
Division I. — Shell with broad longitudinal ribs and gene- 
rally fine transverse lines. 
a. Without a protuberance on the neck. — $o 
Westindian species belongs to this group. 
b. With a protuberance on the neck. 
