The Opisthobranchiata of South Africa. 71 



The frontal margin as well as the dorsal is provided with fine 

 arborescent tufts, in the former more numerous, in the latter fewer 

 in number. The retractile rhinophores with very perfoliate club. 

 The gill composed of a few (5) tripinnate leaves. The tentacles ear- 

 shaped; the foot rather well developed. 



The strong mandibles formed of closely set fine staffs. The 

 radula not narrow ; the rhachis naked ; the pleurae with a few (3) 

 strong hook-shaped lateral plates and a series of (5-35) rather 

 flattened outer plates. The prostata large, embracing the two 

 seminal bags ; the glans armed. 



The Euplocami form a transition link between the Polycerse and 

 the Plocamopheri, being more closely allied to the latter. 



Only some few species are known, the validity of which even is 

 not quite established : — 



1. E. croceus, Phil. 



M. Mediterr. 

 Var. Atlantica, Bgh. 



M. Atlantic. 

 Var. capensis, Bgh. 



M. Capense. 



2. E. japonicus, Bgh. 



M. Japon. 



3. E. pacificus, Bgh. 



M. Pacific. 



E. croceus, Phil., var. capensis. 

 PL XII., figs. 18-24. 



Four specimens of this form were sent for examination, procured 

 off Great Fish Lighthouse, off Cape Hangklip, and off Cape Point 

 Lighthouse. 



When alive they were of a " greenish colour with small red spots." 



They closely resembled each other, and had a length of 30-35 mm. 

 They are now of a whitish colour, but the best preserved and the 

 largest of them showed the gill reddish yellow, so too the arbores- 

 cences of the frontal and lateral appendages ; moreover, small 

 reddish yellow spots were sparsely scattered over the back and on 

 the sides of the body. In all the specimens fine white points, some- 

 times a little prominent, appeared on the body, and, in all, the 

 intestines shone blackish through the right side of the body. 



Two individuals were dissected. 



In the largest individual (35 mm. long) the diameter of the frontal 

 veil with its arborescences was 25 mm., the height of these last rose 



