Sub-family Ei phrosyninaj . 



■ •rally short, with t"<-w segments. I 'In- syncipital region of the head ited 



and bending over the tip of the snout, partly ventral. Eyes both on the dorsal and ventral 



.. Au unpaired median tentacle and one pair of lateral ones, arising in front of the ventral 



Dorsal cirri two on each side, a lateral (dorsal) and a median (branchial) one. Branchiae 



rally several in a ruw on each segment. Two anal cirri. 



Genus Euphrosyne Savigny. 



Siboga-expedition had the good luck to collcct a rather great number of Euphrosyne- 

 specimens, that only partly could be referred to the known species /{. laureata Sav. and E. 

 superba Maren/., whereas tor the remaining ones ten new species must be established. Among 

 are some interesting small species (E. a/jinis, E. hystrix, E. maculata, E. pelagica, E. 

 pilosa, E. which, by the presence of enlarged eyes. elongated bristles in the neuro- 



podium and a transparent body, show a marked pelagic character, the other species of 

 this genus having a more sedentary rhanner of living, under stones and corals, upon roots of 

 plants etc. Whereas hitherto only a single species (/:. laureata) was mentioned from the 

 Malay Archipelago, thanks to the investigations of the Siboga-expedition the number of species 

 from this part of the Indian Ocean now amounts to twelve. They may easily be identitied by 

 means of the following key : 



Malayan species of Euphrosyne. 



Hranchiae 

 ent. 



■airs 



S pairs 



branchiae not ramose, cirriform 



ooi ventral 



bristles of normal length. 



branchiae ramose; 

 tips tapering. 



branchiae ramose; 

 tips tapering. 



branchiae ramose; 

 tips expanded. 



pelagic; ventral bristles 

 elongated. 

 not pelagic ; ventral 

 ■ les "f normal lengt h. 



agic; ventral bristles 

 elongated. 

 ii' 't pi lagic . ventral 



if normal length. 



ir; ventral biisi 

 ted. 

 I ramose; dorsal bristles elongated 



branchiae ramose; tips expanded 



12 p iranchiae, tips not expam lagic . . 



4 





E. pilosa Horst. 

 E. globosa n. sp. 



E. iijjinis Horst. 



E. superba Marenz. 

 /;'. mucosa 1 torst. 



E. hystrix 1 1 



E. laureata Sav. 



E. ; 1 lorst. 



E. sibogae Horst. 

 E. longesetosa 1 1 

 E. obiensis II 

 E. maculata I lorst. 



