56 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
Mr. Lechmere Guppy observed on the foregoing paper 
that the alliances pointed out by the anther between recent 
Westindian shells and European mioeene fossils were worthy 
of notice in connection with the theory of the Tertiary 
Atlantis. He had not noticed any Kissoidae in the West- 
indian mioeene ; but he thought that if such were found 
they might probably lend support to that hypothesis. The 
species particularly noticed by Mr. Krebs as being allied 
were the following : — * 
R* decussata Mont, fossil at Yienna, and also allied to R. 
obsoleta Partch. 
R. reticulata Sow. allied to R, cochleanella Lam. and also 
to R. olsoleta Partch, both European Miocene Fossils. It 
might be doubted if the distribution of the species were 
really in all cases as wide as indicated in the paper : for he 
did not think that more than a very few among known 
eh ells were common to the East and Westindies, He should 
like the Eissoinae alleged to be common to those regions to 
be carefully examined and compared before being pro- 
nounced identical. If such identity be established it is 
scarcely less interesting than the alliances between the 
recent and fossil fannas ; and the identity maybe accounted 
for on the same grounds, namely the migration eastward 
during the early and middle tertiary period of the West- 
indian marine fanna. Mr. Guppy further inclined to the 
opinion that the revised and expurgated list of Westindian 
Eissoinae given by Mr. Krebs at the end of his paper 
might he regarded as fairly correct. All the known forms 
of Westindian Eissoinae could be placed under one or ano- 
ther of the eight (or ten) names included in the list,. 
