22 LIMACIDiE. 



foreign works. The following description combines the 

 observations of Alder and of Nillson. In size it is one 

 of the smallest species, not exceeding an inch and a 

 qnarter in length. The colour of the British example 

 was a pale dull yellow, very transparent and lubricous, 

 with an obscure band on each side of the shield and 

 back, the tentacles being black. Nillson and Drapernaud 

 notice a greenish tinge. In shape it is slender and 

 rounded. The shield is rounded behind, and covered 

 with fine concentric wrinkles. The back is rounded, 

 but compressed towards the tail. The mucus (this cha- 

 racter is especially to be noted) is orange-coloured. 



LimaoG tenellus of Miiller, is referred to the genus 

 Arion, by MM. Ray and Drouet, in their catalogue of 

 the Mollusca of Champagne. It is possible that they 

 have mistaken the fry of Arion horfensis for this species. 

 We have found them in numbers at Monkstown on 

 the wet surfaces of trees after a shower, and when small 

 they bear a striking aspect to Limaces. 



L. SowERBii, Ferussac. 



Back carinated throughout ; shield granulated ; . tawny or 

 ochre yellow, with dusky markings ; keel of back yellow. 



Plate E. E. E. fig. 3. 



Limax Sowerlii, Fkrussac, Hist. p. 96, pi. 8 d. f. 7, 8. — Denson, in Mag. Nat. 



Hist. vol. vi, p. 694. — Clarke, Ann. Nat. Hist. vol. xii. 



p. 338, pi. 12, f. 14, 15. —Alder, Cat. Moll. Northumb. 



p. 31. 

 „ carinatus. Gray, Man. p. 115, pi. 3, f. 17. — Thompson, Ann. Nat. Hist. 



vol. vi. p. 208.— Brown, HI. Brit. Conch, p. 55, pi. 58, f. 6; 



and pi. 59, f. 14. 

 „ marginatus, Drafarnaud (not of Muller), Hist. p. 124, pi. 9, f. 7. 



Of our two keeled slugs, this is the largest and stoutest; 



