TRITONILXjK. 03 



Sub-fern. TRITONIINiE. 



Stomach simple. 



In this division the stomach appears to he simple, and not 

 ramified or extending into the appendages arranged iilong 

 the hack, as is the case in the next section of the family. 

 The genera inhahit corallines and sea-weed in shallow 

 water, and have heen observed to prey upon the zoophytes 

 that live around them. 



Genus TRITONIA, Cuvier. 



Teeth, central 1, lateral 10 10, or U 14; mouth 

 armed with homy jaws. Head with a tuberculated or digi- 

 tated veil ; tentacles two, ramose and filamentous, tufted or 

 simple. Gills ramose, arranged in a single series, on a 

 ridge on each side of the hack. 



Syn. Sphaerostoma, Macgillivray. Liriope, Gist. Can- 

 diella, Gray. 



Ex. T. plebeia, Johnston, pi. 64, fig. 5. 



The T. Hombergi is a very large Nudibranch, often grow- 

 ing to half a foot and even more in length. Sir J. G. 

 Dalyell says that its principal food is the Lobularia digitata, 

 and Dr. Johnston records that he took what appeared to he 

 the fry of Aster/as papjposa from the stomach of a Triton in. 



Species of Tritonia. 



acuminata, Costa. ITombergi, Cuv. 



alba, Alder and Hanc. lincata, Alder and Hanc. 



Costa?, Yerany. plebeia, Johnst. 



cyanobranchiata, Riipp. quadrilatera, PA/7. 



decaphylla. Cantr. rubra, Hupp. 



glarna, Riipp. tbetbydea, Chiaje. 



