328 RKCORDS OF THK AtiyTRALIAN MUSEUM. 



Description. — This species belongs to the section of the Onchidiida? 

 in which the mantle is covered with prominent grannies, having the 

 appearance of little tubercles. Its form is oval and its dorsal surface 

 convex ; the length varies from fifteen to eighteen lines. The mantle 

 is arched and covered with little warts, and the sides are longer than the 

 foot ; but the thick undersurface of the mantle is quite loose. The foot 

 is thick and fleshy with transverse grooves, and is oval. The anus is a 

 large perforation at the extremity of the mantle, and in the median line. 

 The eye tentacles are short and cylindrical, and dilated at the tips to 

 carry the ball of the eye. For description of this see the Ferruginous 

 Onchidium (0. ferragineum). This mollusc is dark green above, lighter in 

 colour at the lower border of the mantle. The foot is yellow. We found 

 it commonly on the beaches at Port Praslin, New Ireland, and under the 

 same circumstances as the preceding species (Lessou). 



Oncidiella pacuydekma, Plate. 

 OiLcidiella ixichijdermn, Plate, Zool. Jahrb., Anat., vii., Ih93, p. 204. 



This species is described by Plate from "Victoria". The Australian 

 State is not the locality fiom whence Buccholz collected it ; and of the 

 foity-eight localities of this name in a modern atlas, Plate's species is 

 probably from a Western Equatorial African locality. 



No <J)i.chidiid(f have yet been described fiom Victoria, Australia, but 

 it is obvious that 0. itatelloidet! should occur there. 



Oncidiella tabulakis, Tappanme Canefri. 



(hicidiella tnhiduris, Tapparone Canefri, Faun. Mai. N. Guinea, 1883, p. 212. 

 / Onclddimn planatnm (Quoy and Gaimard), Tapparone Canefri, Loc. cit. 



Obs. — A short note in Italian gives no specific data of this species. 

 Locality. — Wokan, Aru Island. 



