LIMN^EA. 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. Limncea 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 trans- 

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

 to be intorted. The shell is often eroded. Gulnaria lacus- 

 tris, 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 ampul- 

 laceous and rather thinner than usual : tvhorls exceedingly 

 convex, the last being larger in proportion to the rest : spire 

 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 spire and a 

 smaller mouth. 



Var. 6. intermedia. Shell rather compressed towards the 

 front margin and thinner than usual : spire more produced : 

 mouth expanded. Limnea intermedia, Fer. in Lam. An. s. 

 V. vi. pt. ii. p. 162. 



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



Var. 8. labiosa. Shell smaller, having the outer lip re- 

 markably expanded and reflected. L. 0*5. B. 0*35. 



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

 beautifully marked by alternate bands of brown and white, 

 which are sometimes confluent. 



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

 produced : suture deep. L. 0'4. B. 0-225. 



