PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
54 - 
cancellata Phil, (philippiana Pf. and pulehra Ad.) 
chesneli Mich, (candida Brown , eatesbyana Orb. 
and scalarella Ad.) 
decussata Mont, (janus Ad. striatocostata Orh* 
and striosa Ad.) 
dnbiosa Ad. (dunkeri Phil.) 
elegans Orb . 
elegantissima Ort. 
firmata Adams 
fortis Adams 
laevigata Adams 
multi costa Adams 
reticulata Sow. (? princeps Ad.) 
sagraiana Orb. 
sealariformis Adams 
vitrea Adams. 
So adds as appertaining to the Westindies R subanguial a< r 
Adams and semiglabrata Adams, and describes as new 
species : R. labrosa , bicollaris , and fenestrata . 
The modest way in which this competent judge speaks 
of the opinions of other authors ana in which he presents 
his views is very commendable, and be places before the- 
student all the available materials to enable him to form a 
judgment upon the points under discussion. 
Taking Schwartz von Mohrenstern’s work as a basis, 
and examining a very large number of Westindian Bis- 
soinee we are inclined to reduce the species to the follow- 
ing 10 (or 8 ?) 
1 . Bissoina brownian a Orb. 
B. laevissima Adams 
laevigata Adams 
sloaneana Orb . 
vitrea Adams 
