EOLIDID^. 



99 



two lateral crests, on whicli are tlie eyes; foot 

 very narrow. 



L. nigra. Fig. 130 ; mag. 



Family II. Eolidid^. 



With gills in the form of lengthened warts 

 [papillce)^ arranged along the sides of the back ; 

 tentacles not retractile, without sheaths ; tongue- 

 teeth central, without laterals ; skin smooth, with- 

 out sjncula; no mantle. 



Eoh's (Cuv.). Tentacles four, slender, the dorsal 

 pair sometimes ringed ; gills simple, cylindrical ; 

 tongue-teeth comb-like. 



* Gills numerous, depressed, overlapping : 



E. papillosa. 

 Alderi. 

 glauca. 



** Gills clustered : 



E. coronata. Fig. 131 ; n.s. 

 Drummondi. 

 rufibranchialis. 

 pellucida. 

 gracilis, 

 alba, 

 punctata. 



*** Gills in transverse, rather distant, rows : 



E. smaragdina. 

 elegans. 

 carnea. 

 glaucoides. 

 lineata. 

 Lands burgii. 



E. angulata. 

 nana, 

 concinna. 

 aurantiaca. 

 olivacea. 

 cingiilata. 

 vittata. 



Northumbrica. 

 viridis. 

 arenicola. 

 purpurescens. 

 caerulea. 



H 2 



E. picta. 

 tricolor. 

 Farrani. 

 amoena. 

 pustulata. 

 Peachii. 

 stipata. 

 inornata. 

 Couchii. 

 Glottensis. 

 amethystina. 

 exigiia. 



