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 had been in Misdroy on the Wollin Island, and 

 I was fortunate to find amongst numerous specimens of Arion 

 fuscus, O. F. Muller, one of A. citrinus, Westerl., 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 1 for a copy of 

 which I am indebted to the author's liberality. 



In its external appearance and the form of the radula my 

 specimen agrees with Westerlund's diagnosis 2 ; 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 Arion. 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 



1 Conchologist, 1893, vol. ii., pp. 113-17 

 - E.xpostS crit., 1S71. 

 Journal of Malacology, Vol. iii., No. 3. 



