CHIORTERA. 7 J 



Genus GLAUCUS, Forster. 



Tentacles four, short and conical. Gills in tufts on 

 tubercles at the sides of the body. Foot rudimentary. 



Syn. Pleuropus, Bajin., not Eschsch. Lauiogerus, 

 Blainv. Eucharis, Peron., not Lair. Dadone, Gist. 

 Nausimacha, Gist. 



E.v. G. Facificus, Eschscholtz, pi. 05, fig. 7. 



The tufts of gills proceeding symmetrically from the 

 sides of the body give this genus a very peculiar appear- 

 ance; according to the observations of Mr. Bennett, the 

 Glaucus feeds greedily on the gelatinous Porpita and 

 Velella, floating Acalephs of a blue colour, which probablv 

 serve to give a similar colour to these Nudibranchs. 



Species of Glaucus. 



Atlanticus, Blainv. Forsteri, Quoy and Gaim. 



draco, Eschsch. Pacificus, Eschsch. 



Eucharis, Peron andLesueur. radiatus, Gray. 



Genus CHIORERA, Gould. 



Body limaciform. Head very large, semi-globose, pedun- 

 culated ; mouth encircled with a double series of cirrhi ; 

 tentacles cephalic, foliate, retractile. Branchial lobes fla- 

 belli form, six, in a single series on each side; generative 

 aperture on the right side. Vent distant, near the back. 



Ex. C. leonina, Gould. 



The most remarkable feature of this genus consists 

 in the long cirrhi surrounding the oral disk, each of which 

 has an independent motion; the foot is folded longitudinally. 

 It is from Port Discovery, Puget Sound. 



