CATALOGUE OF SHELLS. 53 
2. N. Compressa. B. 
N. Tessallata apud Reeve in part. 
a. Calcutta. 
b. Ceylon. 
But two species of Navicelle are found at Calcutta, one a broadly 
expanded species the other one laterally compressed. It is 
improbable that the Philippine shell N. Tessallata is identical 
with the Calcutta species, and I have therefore selected one 
of Reeve’s names for the Calcutta shell. 
3. N. Eximia Reeve. E. L. Layard. 
NV. Cerulescens var (2) 
Ceylon. 
4. N. Porcellana Lin. 
NN. Elliptica, Lam. 
a. Mauritius. Madagascar. 
b. var. (7?) Marquesas Islands. Dr. Tonnere. 
c. Mauritius. Mr. Lietard. 
5. N. Psittacea Reeve. Dr. Tonnere. 
Society Islands. Australian Islands. 
A species much eroded though protected by a stout epidermis 
The breadth of the muscular scars is a conspicuous feature in this shell. 
6. N. Macrocephala LeGuillon var (?). Dr. Tonnere. 
Navigator's Islands, Feejees. 
A depressed shell of the same type as the last, mach eroded 
and with a thick epidermis. The muscular scars are rather 
broad and some specimens on being held against the light 
display, fine black zic-zac, markings, but not like the large 
surface ones in Reeve’s figures. 
