The Nudibranch-Genus Triopha in 

 California 



By T. D. A. COCKERELL 



The genus Trioplia, named by Bergh in 1880, includes a series 

 of nudibranchiate molluscs occurring on the Pacific Coast of North 

 America. On August 23, 1915, a new species of this genus was 

 obtained by the Scripps Institution in shallow water off La Jolla, 

 California, the particular lot of material containing it being listed 

 as "haul 74." It may be known as Triopha scrippsiana n.sp., with 

 the following characters : 



16 2o 





xs^ 



"P/eural +£frTr. 



Length about 27 mm. ; white, marked with bright vermilion, like 

 T. carpenter! ; but tentacles pale yellowish olivaceous, not at all red; 

 appendages of frontal margin (six on each side, one or more very 

 small), small, the larger ones tuberculate, and all wholly white; 

 small tubercles on body very bright vermilion, but they are mere 

 subpyramidal eminences, not elongated structures as in carpenteri. 

 Branchiae very slightly marked with red, tip of tail red. (Described 

 from living specimen.) 



