50 doribinjE. 



punctata, Quoy and Gaim. sponsa, Ehrenb. 



scabra, Quoy and Gaim. superba, Gould. 



sordida, Quoy and Gaim. Tilesii, Tilesius. 



spiraculata, Gould. tuberculosa, Quoy and Gaim. 



Genus ASTERONOTUS, Ehrenberg. 



Branchial aperture of the mantle stellate, or partly closed 

 by lobes arranged in a stellate manner. 



Ex. A. cruentus, Alder, pi. 62, fig. 3. 



The back of the mantle in this genus is smooth and 

 without tubercles or appendages; the mantle is wide, and 

 entirely covers the head and foot. 



Species of Asteronotus. 

 cruentus, Alder. Hemprichii, Ehrenb. 



Genus ACTINOCYCLUS, Ehrenberg. 



Gills in the form of a radiate disk, large, lobed, and pin- 

 nate ; anal aperture not tubular, situated behind the bran- 

 chial disk, but in the same aperture of the mantle. 



Syn. Dendrodoris, Gray, not Ehrenb. 



Ex. A. grandiflora, Buppell, pi. 62, fig. 4. 



The principal peculiarity in this genus is the fact of the 

 vent being separate from the branchial aperture, but con- 

 tained in the same common cavity of the mantle ; the gills 

 do not appear to form a complete circle round the vent, but 

 to be interrupted posteriorly. 



Species of Actinocyclus. 



fragilis, Ehrenb. tuberculatus, Cuv. 



grandiflora, Hupp. velutinus, Ehrenb. 



limbatus, Cuv. . verrucosus, Ehrenb. 

 setiger, Riipp. 



