On the Generative System in the Genus Testacella. 21 
Recorded from Trenton Falls, New York, and St. Martin’s 
Falls, Albany River, Hudson’s Bay. 
4, Limnophilus, sp. 
Carberry, Aug. 4, 1892. 
ORTHOPTERA. 
1. Arphia sulphurea. 
Gryllus sulphureus, Fabr. Spec. Ins. i. p. 369. n, 39 (1781). 
Carberry, Aug. 4, 1892. 
A common North-American species. 
2. Stenobothrus, sp. 
Carberry, July 11 and Aug. 4, 1892. 
Il].—The Morphology of the Generative System in the 
Genus Testacella. By Waurer E. CoLiince, Demon- 
strator of Biology, Mason College, Birmingham. 
[Plate I.] 
CONSIDERING how plentiful and widely distributed the three 
British species of this genus are, and the interesting relations 
that exist between the Testacelle and a number of genera not 
found in Great Britain, it is somewhat surprising to find that 
they have received so little attention from malacologists in 
this country. 
One of the most valuable and important works upon the 
European slugs is that by Dr. Simroth *, published in 1886, 
in which he drew attention to the importance of the genera- 
tive and alimentary systems as a basis for classification ; and, 
although I think it very desirable when describing new 
species of slugs to fully describe the general anatomy of the 
same, this valuable monograph has been the means of placing 
the study of the slugs upon a more rational basis than it has 
hitherto occupied, and has given students a ready means of 
distinguishing one species from another by the morphology 
of the reproductive organs. 
Dr. Scharff, in his admirable account of the Irish slugs tT, 
* Zeitschr. f. wiss. Zool. 1885, vol. xlii. pp. 203-366, 5 pls. 
+ Trans. Roy. Dublin Soc. 1891, vol. iv. ser. 2, pp. 513-562, 2 pls. 
