GASTEROPODA. 



201 



found them alive after five years, although in the warm 

 climate of Calcutta.* The Indian species lay globular 

 eggs, of a pale green colour, about the size of small peas, 

 which are found in clusters attached to sticks or other 

 things in the water; when dry, they have a beautiful 

 appearance. 



Order VII. 

 NUDIBKANCHIA. 



The animals of this order breathe by lungs of various 

 forms, which are naked, and symmetrically arranged on 

 the back; they never form a shell; from this circum- 

 stance the names of the genera will alone be mentioned in 

 this work. Philippi enumerates them as follows : — 



Family 1. — Doridiacea. Doris Lin.; Villiersia 

 Z>' Orb. ; Hexabranchus Ehren. ; Atagema Gray ; Go- 

 niodoris Forbes ; Brachychlanis Ehren. ; Triopa Johnston ; 

 j Idalia Leuckart ; Ancula Loven ; -ZEgires Loven ; Polycera 

 i Cuvier ; Thecacera Fleming ; Plocamophorus Rueppell ; 

 Ceratosoma Gray. 



Family 2. — Tritoniacea. Tritonia Cuvier ; Den- 

 dronotus Alder. ; Doto Oken. ; Duvaucelia Leach ; Scyllsea 

 "Lin.; Nerea Lesson ; Meliboea Rang. ; TethysX^. ; Bor- 

 nella Gray. 



Family 3. — JEolxdiacea. Glaucus Forster ; iEolis 

 Cuvier; Pterochilus Alder. ; Calliopea D 1 Orb. ; Tergipes 

 Cuvier; Gellina Gray; Lomanotus Verany ; Stiliger 

 Ehren.; Hermasa Loven ; Cloelia Loven ; Alderia Allman ; 

 Proctonotus Alder ; Janus Verany. 



1 



* Woodward, Recent and Fossil Shells. 



