LIMNiEA. 105 



Var. 1. Burnetti. Body a little broader than that of the 

 typical form, dark olive, spotted with opaque yellow : mantle 

 nearly black, with a few paler spots. Shell rather globular 

 and solid, of a dull aspect, yellowish-brown, closely and 

 strongly striate in the line of growth : epidermis rather thick : 

 the last whorl nearly covering all the others : spire exceed- 

 ingly short, nearly truncate and almost intorted. L. 0-725. 

 B. 0-65. Limnc^a Burnetti, Alder in Ann. Nat. Hist. n. s. ii. 

 p. 396, pi. ii., top figures. Limnceus Burnetti, F. & H. iv. 

 p. 172, pi. cxxiii. f. 8, 9. 



Var. 2. lacustris. Body of a darker colour than usual. 

 Shell resembling that of the last variety; but it is much 

 smaller and more glossy, and has strong and regular transverse 

 grooves, and the spire is not quite so short nor inclined to be 

 intorted. The shell is often eroded. Gulnaria lacustris, Leach, 

 Moll. Brit. Syn. p. 107. 



Var. 3. lutea. Shell remarkably solid, having a very short 

 spire of from 3 to 4 whorls. Helix^ lutea, Mont. Test. Brit, 

 p. 380, tab. 16. f. 6. 



Var. 4. ovata. Body of a paler colour. Shell ampullaceous 

 and rather thinner than usual : whorls exceedingly convex, 

 the last being larger in proportion to the rest : sj>ire very 

 short : sutai^e deep : mouth very large. Limneus ovatus, Drap. 

 Hist. MoU. p. 50, pi. ii. f. 30, 31. 



Var. 5. acuminata. Shell resembling the last variety in aU 

 respects, except in having a more produced spire and a smaller 

 mouth. 



Var. 6. intermedia. Shell rather compressed towards the 

 front margin and thinner than usual : S2nre more produced : 

 mouth expanded. Limnea intermedia, Per. in Lam. An. s. V. 

 vi. pt. ii. p. 162. 



Var. 7. ohlonga. Shell oblong and compressed in front. 



Var. 8. lahiosa. Shell smaller, having the outer hp remark- 

 ably expanded and reflected. L. 0-5. B. 0-35. 



^ Var. 9. picta. Shell rather smaller than the last, and beau- 

 tifully marked by alternate bands of brown and white, which 

 are sometimes confluent. 



Var. 10. maritima. Shell dwarfed, rather solid: spire pro- 

 duced : suture deep. L. 0-4. B. 0-225. 



F 5 



