10 LIMACIDiE. 



head blackish ; tentacula short, thick, and very black ; 

 lateral bands of the sole yellow ; mucus abundant, thick, 

 of an orange-yellow colour ; length thirty millimetres. 

 He states that it is unproliflc, and lays its eggs from 

 September to December. They are oval, opaque, and 

 yellowish. It lives in moist and mossy places. We have 

 never been so fortunate as to meet with an Avion answer- 

 ing to this description. 



A. HORTENSis, Ferussac. 



Body slender ; shield oblong ; margin of foot narrow and 

 plain ; mucus yellow. 



Plate F.F.F. fig. 1. 



Avion hortensis, Ferussac, Hist. p. 65, pi. 2, f. 4, 6; and pi. 8, f. 1,2, 4. — 



Bouchard Chantereaux, Mem. Soc. Ag. Boul. 2nd ser. 



vol. i. p. 160. — Gray, Man. p. 107. — Alder, Cat. Northumb. 



Moll, p. 30. — BouiLLET, Moll. Aiivergne, p. 13. — Brown, 111. 



Brit. Conch, p. 55. 

 Limax circumscripfus, Johnston, Edin. Phil. Journ. vol. Ixxvii. 



„ fasciaius, Nillson, Moll. Suec. p. 5. — Kickx, Moll. Brab. p. 4. 



This beautiful little slug is very inferior to our common 

 Avion in dimension. It is more elongated, and semi- 

 cylindrical, preserving a nearly equal breadth throughout, 

 and when at rest, does not contract its body, or hump 

 its back nearly so much. It is usually, when crawling, 

 about an inch, or an inch and a half in length, but grows 

 longer. The head is small, and generally veiy dark, 

 being of a dusky blue colour, as well as the short supe- 

 rior tentacles ; the lower ones, and cheeks, are of a lead 

 blue. The shield is oblong, roughly granulated, varying 

 in colour, but mostly dark striped in the centre, and 

 along the margins, so that two pale bands appear to 

 streak it on each side of the middle ; its orifice is cen~ 



