A FE'W NOTES ON SLUGS. 



By Professor D. T. A. COCKERELL, F.Z.S. 



The following notes refer chiefly to a few matters which 



deserve further elucidation, but the writer is not now in a 



position to follow up the various lines of enquiry suggested by 



them. 



AGRIOLIMAX. 



(i.) A. laevis (sens, lat.) in Bermuda. The "Challenger' 

 expedition obtained a young Agi'wliinax laevis at Bermuda ; 

 it is in the British Museum, in the same bottle as some 

 Aiiialia gagafes from the same island. It is i3f mm. long ; 

 sole narrow, diam. i|- mm. ; colour brownish-ochrey, 

 slightly greyish dorsally, sole ochrey, unicolorous ; mautle 

 greyish with black marbling, except the margins and 

 near them, which are pale ochre ; neck grey above. 

 Tail hardly keeled ; mantle not visibly concentrically 

 striate ; respiratory orifice not very far behind the middle ; 

 median area of sole a little wider than either lateral area ; 

 longitudinal line of edge of sole about median between 

 upper and lower margins of sole-edge. In general 

 appearance, the slug recalls A . hcvendti var. pictus. 



(2.) A. laevis (sens, lat.) in Jamaica. I found this common 

 at Moneague, in Jan., 1892; alive it was 16 mm. long, 

 mantle 7 mm., all dark brown, slightly pale near mantle 

 anteriorly, no obvious mottling ; mantle with concentric 

 lines ; sole all pale grey, unicolorous. Mr. Fawcett sent 

 me the same species from Cinchona ; the specimens 

 were 10 mm. long, grey-brown, not very dark, sole pale, 

 unicolorous. Body above and mantle, minutely speckled 

 Avith blackish; slime colourless. In alcohol they appear 

 pale, and some are almost reticulate on the body. The 

 shell is 2^ mm. long, i| broad, oval, but with the sides 

 straight ; nucleus on posterior edge, slightly to the left, 

 concentric grooves visible but not strong, no sign of any 

 ridge such as is in h:yen.iti, colour opaque white. Later, 



