MOLL use A OF PLYMOUTH. '^ 425 



colour had all disappeared, and the hepatic caeca were pure brown 

 in one individual, yellowish brown in the other. This loss of the 

 green colour was probably due to the creatures eating no more of 

 the green weeds, for several days previously the Bryopsis had turned 

 brown and died, and the Hermaeas were not seen upon the Entero- 

 morpha after August 7th. 



Section B.—CLALOHEPATICA, Bergh. 



Subsection — Ceeatonota, Lankester. 



Family— TniTO^MIIBM. 



12. Tritonia, Cuvier. 



14. ^Tritonia Homberqii, Cuvier. 



This species is common on the trawling- grounds. Early in August 

 I found half a dozen young specimens in various stages of growth 

 feeding upon a large colony of Alcyonium digitatum brought in from 

 the fishing-grounds. 



I kept these young individuals (one inch and under) for several 

 weeks in a dish containing algae only — no Alcyonium — to see the 

 effect of starvation upon their colour. They gradually lost almost 

 all their characteristic flesh-colour, and became very transparent. 



13. Can Di ELLA, Gray. 



15. *Candiella (Tritonia) plebeia, Johnston. 



This species has not occurred so frequently this year. 



i^arntZ^/— DENDRONOTID^. 

 14. Dendronotus, Alder and Hancock. 



16. *Dendronotus arborescens. Mailer. 

 This species has not again been taken. 



Family— LO^A-^OTYDM. 

 15. LoMANOTUs, Verany. 



17. ■♦LoMANOTUS genet, Verany. 



LoMANOTTJS GENEi, Verany. Cat. Anim. Invert. Mar. Golf, di Geneva e Nizza, 



Genova, 1846. 



— MAEM0RATU8, A. and R. Monograph. 



— FLAVIDUS, A. and H. Monograph. 



