SUTEE: ANATOMr OF MEDYLA. INSCULPTA. 331 



out posteriorly. In some specimens ttere was no spermatheca, but 

 only a small papilla in its place ; these were, perhaps, immature 

 individuals. The free oviduct is slightly swollen in the middle. In 

 one specimen I found three embryos of different stages of growth 

 embedded in a transparent gelatinous mass, indicating that the species 

 is viviparous. 



The dentition and genital organs most nearly resemble those of 

 Sitala anthropopliagorum, described and figured by Hedley,^ who 

 mentions the presence of a dart sac, but in his figure only an 

 appendix of the penis, inserted further back than in M. insculpta, 

 and a spermatheca are present. 



The close relationship between S. anthropopliagorum and Medyla 

 insculpta goes far to support the view expressed by Dr. von M Ollen- 

 dorff^ that Kaliella, Sitala, Coneuplecta, and Euplecta may perhaps 

 be considered as only sections of one genus. 



M. insculpta has been removed from Helix to Nanina, Zonites, 



I. 



c ^ 



Fig. I. Medyla insculpta (Pfr.). Posterior portion of the foot, enlarged. 



,, II. ,, ,, ,, Jaw, much magnified. 



,, III. ,, ,, ,, Teeth of tlie radula, greatly magnified. 



,, IV. ,, ,, ,, Lower portion of the genitalia, much magnified. 



Trochomorpha, and, finally, by Mousson to his genus Trochonanina. 

 Dr. von Mollendorjffi has given good reasons for abandoning Mousson's 

 genus, since it includes a number of now well-defined genera. The 

 proper place f(n' the species is, in my opinion, using Dr. von 

 M Ollendorff's latest classification, under the genus Medyla, Albers, 

 section Euplecta, Semper. 



When Pfeiffer described the shell its habitat was unknown, but 

 later on it transpired that it came from Norfolk Island, and my 



1 Proc. Linn. Soc. New South Wales, ser. ii, vol. ix, p. 386, pi. xxv, fig. 21 ; 



pi. xxvi, fig. 24. 



2 Bericht Senckenberg. Naturf. Gesell., 1893, p. 65. 



