LIMAX. 13 



mucous gland on tail. Respiratory orifice towards the 

 posterior margin of the right side of the disk, the vent 

 immediately behind it. Orifice of the reproductive system 

 near and behind the right superior tentacle. Tail with- 

 out a mucous pore. 



The species of slug have not been examined with 

 the attention they deserve, and there are several forms 

 recorded by continental authors, which may possibly still 

 be detected in Britain, especially in the south of England, 

 though we have failed to find any others than those here 

 described. 



The best paper on our native Limaces is that " On 

 the species of Lirnaoo found in Ireland, 1 ' by the Rev. 

 B. J. Clarke, and published in the twelfth volume of 

 the Annals of Natural History. 



L. agrestis, Muller. 



Back rounded, tail obliquely carinated ; shield wrinkled, 

 rounded behind ; colour pale or dark grey, mottled. Mucus 

 milky. 



Plate D. D. D. fig. 2. 



Liniax agrestis, Muller, Verm. vol. ii. p. 8. — Linnm;us, Syst. 1082. 



— Draparnaud, Hist. p. 126, pi. 9, f. 9. — Ferussac, Hist, 

 p. 73, pi. 5, f. 7-10. — Fleming, Brit. Ann. p. 256. — 

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

 vol. i. p. 66. — Gray, Man. p. 117, pi. 3, f. 17. — 

 Clarke, Ann. Nat. Hist. vol. xii. p. 338, f. 129 b. — Nun- 

 neley, Leeds Trans, vol. i. p. 48, pi. 1, f. 4. — Macgillivray, 

 Moll. Aberd. p. 77.— Brown, 111. Brit. Conch, p. 56. 



Limacella concurva (Shell), Brard. Moll. Par. pi. 4, f. 5, 6, B. 14, 15. 



Limacellus obliquus, Turton, Man. p. 26, pi. 3, f. 17. 



The most mischievous and abundant of all slugs is 

 this small, but voracious species, which abounds every- 

 where in fields and gardens, devouring leaves of vege- 



