THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
[SIXTH SERIES.] 
No. 34. OCTOBER 1890. 
XXXII. — Notes on Slugs , chiefly 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 hitherto 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 
affording 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. AniOLIMAX , AnABJENUS , AND PllOFlIYSAON. 
This group of Amui-like slugs has not been very well 
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-peduncle. 
(1) No caudal mucus-pore. . . , Gen. Prophysaoti , Bid. & Binn., 1873. 
Sect. a. Fasciati. Body with dark dorsal band. 
i. Jaw ribbed P. fasciatum, Ckll. 
ii. Jaw striate, not ribbed. P. humile , Ckll. (praec. var. ?) 
Ann. & Mag . N Ilist . Ser. 6. Vol. vi. 20 
