DORlDIDiB. 371 



HoMOioDORis, Bergh, 1881. 



Distr. — H. Japonica, Bergh. Japan. 



Form of the body as well as the rhinophores, tentacles and 

 branchia as in Archidoris ; prostate large ; vagina armed. 



Petelodoris, Bergh, 1881. 



Distr. — P. iriphylla, Bergh. Japan. 



Body subdepressed, the back minutely hirsutely tuberculated ; 

 branchial aperture valved ; branchial leaves tripinnate ; tentacles 

 short, triangular ; penis unarmed. 



Orodoris, Bergh, 1875. 



Distr. — 0. miamirana, Bergh. Tahiti. 



Mantle (nothaeum) somewhat as in Miamira. Keeled above 

 with transverse ribs ; no frontal or caudal veils, or lateral lobes 

 lamellate beneath. Foot rather narrow. Integument without 

 spicules. Armature of the oral aperture as in Miamira — a 

 spinous buccal collar. Odontophore as in Miamira ; but the 

 rachis is hardened. — Bergh. 



Ceratodoris, Gray. 



Syn — Echinodoris, Bergh, 1874. 



Distr. — C. solida, Quoy (xc, 1). Waigiou. 



Form rather depressed ; back everywhere covered with elon- 

 gated papillae ; back and papillae spiculose. Rhinophores and 

 branchiae retractile. Odontophore with the pleurae multidentate. 

 Penis armed at the apex with a series of minute uncini. — Bergh. 



Hexabranchus, Ehr., 1831. 



Syn. — Heptabranchus, Adams. Rhacodoris, Morch (part). 



Distr. — 18 sp. Red Sea, Indian 0., and Australasia. H. 

 sanguineus, Riippell (xc, 94). 



Body soft ; integument non-spiculose (?) ; rhinophores sharply 

 bent, and with an anterior knee, retractile within marginated 

 cavities ; branchiae generally small, numerous, ramose, non- 

 retractile, arranged in six or eight tufts, which are set in an 

 open circle at some distance aroiind the anal opening ; oral 

 tentacles large, fleshy, flat, ovoid or leaf-shaped, with crenulated 

 edge. Odontophore broad, with numerous lateral simple spines 

 in each transverse row ; none median in position. 



Calycidgris, Abraham, 1876. 



Distr. — C. Guntheri^ Abr. Hab — . 



Body depressed ; mantle ample, covered with soft papillae ; 

 branchiae simply laminate, arranged like a cup around the anus, 

 subretractile in a common cavity. Oral tentacles represented 

 by a fleshy , laterally extended veil. Odontophore narrow, bearing 



