[Proc. Roy. Soc. Victoria, 27 (N.S.), Pr. I., 1914]. 



Akt. IV. — The Anatomy of Caryodes dufresnyi, Leach 



Bv OLIVE B. DAVIES, M.Sc. 



(Government Research Scholar, Melbourne Univet-eity). 



(With Plate IV.). 



[Read 14th May, 1914]. 



Introduction. 



Most of the specimens with which this work was carried out wer ■ 

 collected by Mr. C. French, at Port Esperaute. N.W. Tasmania, 

 and sent to Mr. Kershaw, at the National Muesum, who kindly gave 

 them to me to work out their anatomy. 



Two other specimens, one of which was immature, were collected 

 by Miss Raff, M.Sc, at Mount Wellington, Tasmania. 



Caryodes dufresnyi Avas named and first described l)y Leach as a 

 Helix; Zoological Miscellany, vol. 2, pp. L53, L54. pi. 120. 



A short account of the anatomy, mostly of the reproductive 

 system, has been given by Semper, in Reis. im Philip., vol. iii. p. 

 102, pi. xvi., f. 7. 



Mr. C. Hedley, F.L.S., has given us a description and a figure in 

 the Proc. Linn. Soc, N.S.W. (2), vi., 1891, p. 19, pi. ii., f. la, pi. 

 iii., f.l; and some further information as to its systematic position 

 in the Rec. Austr. Mus., ii. 1892, p. 29. 



Other descriptions, chiefly of the shell, have been given by 

 Quoy and Gaimard, in the Voyage of the Astrolabe, vol. ii., j)]. x.. 

 f.l; and by Adams, in the Genera of Recent MoUusca, vol. 2, pp. 

 146 and 153. 



After having been described by Leach as a Helix, Caryodes 

 dufresnyi was described as Bulimus dufresnyi. The genus BuUmus 

 according to Cox, possesses the following characteristics : — " Shell 

 oblong or turreted, aperture with unequal longitudinal margins, 

 toothless or dentate; columella entire, revolute externally or 

 simple; peristome simple or expanded." While Semper adds: — 

 " A parallel ridged jaw. Teeth similar, in straight or curved rows. 

 Shell long, with thick mouth edge. The kidney is, in spite of the 

 long lung, as short as the pericardium; it is three cornered. 



