Xlviii DIV. II. — MOLLUSCAo 



ORDER I. — PuLMONAKiA (continued). 



Family. Genus. Example of Species. 



"V. Oncliidium, Buchanan. . Onchid. typhee, Buch. 



VI. Planorbis, Brug Hel. vortex, Gm. 



VII. Limnaeus, Lam Hel. stagnalis, Gm. 



VIII. Physa, Drap. . . Bulla fontinalis, L, 



IX. Scarabaeus, Montf. Hel. scarabaeus, L. 



X. Auricula, Lam Aur. myosotis, Drap. 



XI. Conovulus, Lam. Melanipes,},, , 

 Montf. 1^°'"'" "^'"^''' ^• 



ORDER II. NUDIBRANCHIATA. 



With naked gills on the back. They are divided into the follow- 

 ing genera. 



Genus. Example of Species. 



I. Doris, Cuv. Dor. verucosa, L. 



II. Onchidora, Bla'inv Onch. Leadiii, Blain. 



III. Plocamoceros, Leiickard ......... .Ploc. ocellatus, Leach 



IV. Polycera, Cuv Doris quadrilineata, Miill. 



V. Tritonia, Cuv Trit. Hombergii, Cuv. 



VI. Thethys, Lin T. fimbria, L. Cuv. 



VII. Scyllaea, Lin S. pelagica, L. Cuv. 



VIII. Glaucus, Forster Doris radiata, Gm. 



IX. Laniogerus, Blain L. Elfortii, Blain. 



X. Eolidia, Cuv Doris papillosa 



XI. Cavolina, Brug. Doris peregrina, Gm. 



XII. Flabellina, Cuv. Doris affinis, Gm. 



XIII. Tergipes, Cuv, . Limax tergipes, Forskal 



XIV. Busiris, Risso Bus. griseus, Risso 



XV. Placobranchus, Van Hasselt Plac. Hasseltii, Cuv. 



ORDER III. — Inferobranchiata. 

 GiUs on the lower sides of the body. 



Genus. Example of Species. 



I. Phyllidia, Cuv Phil, trilineata, Seba 



II. Diphyllidia, Cuv . , Diphyl, Brugmansii, Cuv, 



12 



