ON'ciiiinih.1-: — itinrrNAi.i.. 



:^09 



Foi- i-oinparisDii, tlu' rollowiii^ c'lassilifatioii oi Semi)ei' is of interest, 

 and while not st) (.•oiiiplete, is oC valm^ : it is adapted liei-e for tlie Aastraliau 

 and South Western Pacific foims only : 

 Group I. An ap]>ciulicular t;laiul an. I caitila;4iii.iU.s U\\»- ])rusent in the penis......... 



^ . ,, i>efon\i, (Juvier. 



tumidum. Semper. 

 sleenstrupii, Semper. 



(in.up II. .An apiiendi(.'iilar i^l.in.l present, lait cartila?,Mnuu8 tuhe absent 



Onch'ulinni, Irnpesoidiun, Semper. 

 diinielii, Semper. 



Gronii HI. .\n appendicular j^land al>.-^ent. Imt cartilaginous tube present 



Oxchidiuni, coi-iacenm. Semper. 



Group IV. An apivcndicnlar gland and cartilaginous element absent 



Oncliidintn paiynannni. Semper. 



Group \'. \V ithout an appendicular gland and cartilaginous element ; mantle V.order 



with distinct notches and papilhe. the latter bearing glandular openings.. 



OnrhidtHm yclirulatinti, Semper {=ii<iteUoides, Quoy & Gaimard). 



Group \l. An appendicular gland alisent, but a cartilaginous support is present 



Onchidium i-iin'i-uinn, Quoy i Gaimard. 



IV. — Thk Species. 



(3\CH1I>1U.M VEKKUCULATILM, Clirier. 



Oiirltiih'iini nerri(ri(latHin, Cnvier, Le Regno Animal, "ind ed., iii., 1830, p. 

 46 (f.n.) ; and in Savigny, Descrip. de TEgypt, Moll., 1809^, p. IS, 

 pi ii., fig 3. /'?., Semper, Reis. im Arch. Phil., iii. (Laudmoll., heft 

 Y.] 1880, p. 255, taf. xxi., fig. 1, taf. xxii., figs. 3-4. hi, Nevill, Proc. 

 Asiat. Soe. Bengal., Dec. 1870 (Jide Zool. Rec, 1870). hi, Farran, 

 Rep. Ceyh^n Pearl Fish., iii., 1905, p. 358, pi. vi., tigs. 13-22. It/., 

 Fnjita, Zool. Mag , vii., 1896, p. 47 (in Japanese). Id., Bergh, 

 Challenger Rep., Zool., x., pt. 1, 1884, p. 148, pi. vii., figs. 7-12, p). 

 viii., fig-. 14. /(/., v.Martens in Weber, Zool. Frgebnisse, iv., 1897, p. 

 126.' ]'/., Jhering, Vergl. Anat. Nervensyst. Moll., 1877, p. 230, 

 taf. iv., fig. 16. 



Ouckl'nuu rvrnir,iJalnn,{CviX.), Plate, Zool. .lahi'b., Anat., vii., 1893, p. 168. 



Feronia cerrnrxlafa (Cuv.), Schmeltz, Cat. Mus. Godelfroy, v., 1874, p. 96, 

 No. 1574. Id., Keferstein, Zeits. wiss. Zool., xv., 1864, p. 91. Id., 

 Fischer and Crosse, ^SHdl. Mexiqne, 1878, pi. xxxi., tigs. 13-15. ./(/., 

 Morch, Vidd. Med., xi., 1872, p. 28; and in Journ. de Conch., xx., 

 1872, p. 335. 

 Extennd Chufdcters.— Body form oval, back not strongly arched. 



Head hii-ge, tentacles long and cylindrical. Mantle border smooth ; 



anterior portion of the foot often projecting beyond it. Hyponota smaller 



than the greatest width of the foot sole. 



46Intlie second edition of " Le Regne Animal ", Cuvier thus withdraws his 

 determination of the species submitted to him, and subseq.iently figured as 0. peromt 

 bv Savigny ■ and while the name of 0. ven-uculatnm must remain for 0. pe.-onn pars, 

 as was followed by Keferstein I.e. and others, the figure and description of 0. peronii 

 in Savigny's work therefore represents the type of 0. verfucuLatum, Cuvier. 



