On (lie 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. ArpMa sulphurea. 

 Gryllus suljikureus, Fabr. Spec. Ins. i. p. .369. n. 39 (1781). 



Carberry, Aug. 4, 1892. 



A common North-American species. 



2. Stenohothrus, sp. 

 Carberry, July 11 and Aug. 4, 1892. 



III. — The Morphology of the Generative System in the 

 Genus Testacella. By Waltee E. Collinge, Demon- 

 strator of Biology, Mason College, Birmingham. 



[Plate 1.] 



Considering how plentiful and widely distributed the three 

 British species of this genus are, and the interesting relations 

 that exist between the Testacellce 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 188(3, 

 in which he drew attention to the importance of tlie 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 f, 



* Zeitschr. f. wiss. Zool. 1885, vol. xlii. pp. 203-366, 5 pis. 



t Trans. Roy. Dublin Soc. ItiUl, vol. iv. .ser. 2, pp. 513-562, 2 pis. 



