LIMN^A. 



105 



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

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

 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. Limncea Burnetti, Alder in Ann. Nat. Hist. n. s. ii. 

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

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



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

 SheU 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. Oulnaria lacustris, Leach, 

 MoU. Brit. Syn. p. 107. 



Yar. 3. liitea. 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 ampuUaceous 

 and rather thinner than usual : whorls exceedingly convex, 

 the last being larger in proportion to the rest : sp)ire very 

 short : suture deep : mouth very large. Limneus ovatus, Drap. 

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



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

 respects, except in having a more produced spii'e and a smaller 

 mouth. 



Var. 6. intermedia. Shell rather compressed towards the 

 front margin and thinner than usual : sj)ire 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 lip 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. 



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