ONrnii>iii>.t: — I!i;ktnam. 



n07 



In 1S!);> Plati'-'*^ hiotiwlit tlie family into mofe permanent and stable 

 ei>ndition, establishing the joreneriv and species ; and with this paper, so 

 thorough in all its stages, is offei-ed a systematic position of the genera as 



fdllinvs : 



Tocti branch i a ta 



Origin of Pulmonata 



Nadibranchiata 



/ \ 



Holohepatica Cladohe'patica 



Vatriuulidse 



Peroniua 



OucLidina 



>ucliidella 



— Oncis 



Stylomatophora Basomatophora 



Onchidium 



Of the subsequent specific and anatomical \voi>k bv Haller'", Fujita'*", 

 Wissei*', Farran^-, Felseneer^-', Stantschinsky*^, and many others, little 

 comment need be made, since the work of tliese autliors makes valuable 

 additions and no alterations to the establishment of tlie family as set by 

 Plate, and closelv followed by Simroth^-''. 



nr. — TiiR Mrxf.ra. 



The following key, based on the woi-k of Plate, has been adapted to 

 the classification of the Australian and South Western Pacific forms : 



A. Male genital opening toward the inside and below the right tentacle. 



I. With appendicular gland and cartilaginous element generally present in the 

 penis. 



OiichitHuiii. Hyponota narrower than the sole of the foot. Head large, and in 

 life projecting freely beyond the mantle border. Form oval or elongate oval. 



:•■» Plate— Zool. Jahrb.. Anat., vii., 1893, pp. 93-234, taf. 1-12. 

 ■■'■' Haller— Verh. ver Heidelb., v., 1894, p. 301. 

 ^" Fujita — Zool. Mag., vii., 1896, p. 47 (in Japanese). 



•*! Wissel— Zool. Jahrb., Suppl., iv. (Fauna Chilensis, i.) ; 1898, p. 583 et seq. 

 ^■- Farran— Report on the Ceylon Pearl Fisheries, iii., 1905, p. 329. 

 « I'eiseneer- Mem. .Acad. Belg., liv., 1901, fasc. 3. 

 ■•^ Stantschinsky — Zcnts. wiss. Zool. Syst., xxvi., 1908. 



« Simroth — Bronn's Klass. u. ord. des Tier. Reichs., iii., 1912, Mollusca, Lief. 

 126-130. 



