THE 



JOURNAL OF MALACOLOGY. 



No. 3. SEPTEMBER 29th, 1894. Vol. III. 



NOTE ON ARION CITRINUS, WESTERLUND. 



By JOSEPH F. BABOR, 



.University of Prague. 



(PI. I, figs. 1-5.) 



In August, 1 89 1, I Iiad been in Misdroy on the W'ollin Island, and 

 I was fortunate to find amongst numerous specimens of Avion 

 fuscus, O. F. Midler, one of A. citriniis, ^Vesterl., and as the 

 systematic relations of this form are not as yet definitely 

 established, I will here give the results of the dissection of the 

 above-mentioned specimen. I should state that the real raison 

 d'etre of this paper is a note in a paper by Collinge' for a copy of 

 which I am indebted to the authors liberality. 



In its external appearance and the form of the radula my 

 specimen agrees with Westerlund's diagnosis^; it will, therefore, be 

 unnecessary to here repeat it. The anatomy of the digestive and 

 nervous systems, and of the mantle complex show the relations 

 common to the genus At-ion. Of the reproductive system I will 

 give a more detailed description. The gonade (hermaphrodite gland, 

 ovotestis) is small, ovoid, and of a dark colour, the hermaphrodite 



' Conchologisi, 1893, vol. ii., p|>. 1 13-17 

 - Expose crit., 1871. 

 Journal of .M ai.acoixk.v, Vol. iii., No. 3. 



