118 



THE NAUTILUS. 



Corneous. 



Corneo- testaceous. 



Not seen. 



Testaceous to Corneo-testaceous. 

 In C. majusculum Morelet the 

 corneous layer is quite intimately 

 and equally developed with the 

 testaceous. 



Corneous. 



Testaceous. 



Testaceous. 



Corneous layer quite thick in in- 

 stances as C. bicarinatum Swb., 

 C. filosum Swb., C. madagascar- 

 iense Gray, C. rangelinum, C. 

 xanthocheilus. 



Testaceous to Testaceo-corneous. 



Testaceous. 



Testaceous. 



Corneo-cartilaginous. 



Not seen. 



Not seen. 



Not seen. 



Not seen. 



Testaceous to Sub testaceous. 



Testaceous. 



Testaceous to Sub-testaceous. 



Testaceous. 



Registoma. 



Callia, 



Jamaicia. 



Licina. 



Choanopoma. 



Adamsiella. 

 LiUddion. 

 Otopoma. 

 Cyclostomus. 



Tudora. 



Lconia. 



Cistula. 



Chondropoma. 



Pomalias. 



Realia. 



Oinphalotropis. 



Bourciera. 



Ilybocystis . 



Cyclotopsis. 



Ctenopoma. 



Diplopoma. 



Corneous. 



Membranous. 



Corneous. 



? 

 Corneous. 



Sub-cartilaginoua. 

 Corneous. 

 Corneous. 

 Corneous. 



Corneous. 



Testaceous. 



Cartilaginous. 



Sub-cartilaginous. 



Cartilaginous. 



Corneous. 



Corneous. 



Corneous. 



Collections of the Cyclostomacea are often sadly deficient in oper- 

 cula, and this very interesting feature is as frequently absent as 

 present. It seems most probable that opercula have no exact generic 

 value, and should not be regarded with the extreme importance as- 

 signed to them by Pfeiffer, H. & A. Adams, and other authors. 



It is hoped that a more detailed and illustrated study of them will 

 be made in the future. 



NOTES. 



THE WINKLEY COLLECTION OF SHELLS "A most gratifying 

 gift was received last June from the Rev. Henry W. Winkley, of 

 Branford, Conn.; it consists of a large series, some 1600 species and 



