THE ANNALS 



AND 



MAGAZINE OF NATURAL EISTORY. 



[SIXTH SERIES.] 

 No. ;}4. OCTOBER 1890. 



XXXII. — Notes on Slu(js, chief j/ in the Collection at the 

 British Museum. By T. D. A. COCKERELL. 



The following notes result from a study of various species of 

 slugs, many of them new or liitlicvto ill-understood, which I 

 have been able to examine recently. Most of the specimens 

 referred to are in the British Museum, though some few are 

 in private collections. I have to thank Mr, E. A. Smith for 

 aftbrding me every facility at the Museum ; and I am also 

 greatly indebted to Mr. W. G. Binney for the opportunity of 

 examining many species of American slugs. 



1. Aeiolimjjt, Anadenus, and Profhtsaon. 



This group of ^?-i'o/i-like slugs has not been very wxll 

 understood, partly, no doubt, because of the difficulty of 

 obtaining specimens of the species. I have been fortunate in 

 seeing quite a large series of forms, which I tabulate as 

 follows : — 



A. Sole not differentiated into parts ; respiratory orifice anterior ; genital 

 orifice close to right eye-pedimcle. 



(1) No caudal mucus-pore. . . , Gen. Prophysaon, Bid. «fc Biun., 1873. 

 Sect. a. Fasciafi. Body with dark dorsal band. 



i. Jaw ribbed P. fasciatum, Ckll. 



ii. Jaw striate, not ribbed. P. humile, Ckll. (priec. var. ?). 



Ann. (D Mag. N. Hist. Ser. 6. Vol. vi. 20 



