TRITONIAD^. 



103 



head-veil with branched appendages; gills branched, 

 in a single row on each side. 



D. arborescens. Fig. 140 ; n. s. 



Doto (Oken). Tentacles slender, simple ; sheaths 

 trumpet-shaped ; veil simple ; gills club-shaped 

 or ovate, rough with warts, arranged in one row on 

 each side ; foot very narrow. 



D. coronata. Fig. 141 ; p 

 fragilis. 

 pinnatifida. 



C-J 



f 



139 



140 



141 



Lomanotus (Verany). Lengthened, slender, 

 smooth ; head veiled ; tentacles club-shaped, la- 

 minated ; gills slender, arranged along the waved 

 edge of the mantle ; foot slender, produced at the 

 front into long lateral processes. 



L. marmoratus. Fig. 142 ; f . 

 flavidus. 



