102 Mr. T. D. A. Cockerell's Notes on Slugs. 



series, about twelve on each side. Mantle bluntly angulate 

 behind. Keel indistinct, no lateral ridges. 



The mantle is 12 millim. long, with the slit or opening 

 very near its hind edge. 



Central area of sole about as wide as either lateral area. 



Shell, long. 6, lat. 4 millim., strong, well formed. 



Described from two specimens in the British Museum from 

 Durban, Natal {A. E. Craven, 1875). 



This species is most nearly allied to U. flavescens, Keferst., 

 of which it may prove a subspecies. Keferstein's figure 

 (Mai. Blatt. 1866, Taf. ii.) shows a slug differing from ours 

 in the shape of the body, and especially of the mantle, and 

 the opening in the mantle is different. The slug described 

 by Gibbons (Quart. Journ. of Conch. 1879, p. 139) as flaves- 

 cens appears to he fasciatus, Martens, belonging to a different 

 section of the genus. 



U. Kraussianus, Heyn., from the Cape region, differs from 

 paUescens in its colour and in the shape of the mantle ; but I 

 have been unable to find any more exact definition of it than 

 that given by Krauss in 1848. 



EUsa longicauda (Fischer). 



The British Museum contains two specimens (in alcohol) 

 labelled "EUsa hella, Heyn., Madagascar, from Dr. Heyne- 

 mann," from which I made notes : — 



Length 35 millim. ; mantle smoothish, not reticulate, and 

 I detect no perforation. Median area of sole broader than 

 either lateral area. Tail with a well-developed mucus -pore. 

 Body strongly carinate. 



The species is a variable one, presenting three forms : — 



a. longicauda (Fischer). Yellowish, unicolorous. 



b. maculata (Fischer) = hella (Heyn.) . One of the British- 



Museum specimens is of this form, being pale ochreous, 

 with scattered grey-brown spots on body and mantle ; 

 sole pale ochre. 



C. permaculata, nov. Pale ochreous ; body and mantle 

 thickly marbled with dark brown, reducing the ground- 

 colour in places to pale spots ; sole brownish. Mada- 

 gascar (British Museum, as above). 



The reduced mantle-aperture and the non -reticulate mantle 

 seem to give Eh'sa as good a right to be considered a genus as 

 the other segregates from Urocyclus tabulated above. For a 



