GASTEROPODA. LIMNADZ. 105 
It was found, by Montagu, in a newly made canal, between 
Chippenham and Laycock, in Wiltshire. I have found it in 
profusion in the Surrey and Croydon canals ; and have received 
specimens which were taken in the Cam, near Cambridge, by 
my friend, Dr. F. Granger, who informed me that they were 
not uncommon in that river. 
5. STAGNICOLA VULGARIS. 
S. testa anfractibus septem mediocribus, transversim striatis. 
Helix stagnalis, Linn. Syst. Nat. xii. i. 1244; Penn. Brit. 
Zool. iv. 138. pl. 86. fig. 136; Mont. Test. Brit. 367. tab. 
16. fig. 8; M. & R. Trans. Linn. Soc. vii. 214; Dill. Dese. 
Cat. 962; Turt. Conch. Dict. 65. 
Buccinum stagnale, Mill. Verm. Hist. 327. 
Lymneea stagnalis, Lam. Syst. des dn. et V.91 ; Flem. Edinb. 
Encycl. vil. 77. 
Bulimus stagnalis, Brug. Encycl. Méth. Vers, 303. 13, bis. 
Limneus stagnalis, Drap. Hist. des Moll. 51. pl. 2. figs. 38, 39. 
Le Limnée stagnal. Cuv. Mém. sur les Moll. fig. 2. 
Animal diluté nigricans, aut rufescente-griseum. Pes pallidé 
cinereus. Tentacula lutescentia. 
Habitat in stagnis et paludibus vulgaris. 
Shell, with seven moderately developed whorls, which are 
transversely striated. Height twoinches. Breadth of aperture 
one inch. Length of aperture five-eighths of an inch. 
Colour of the shell similar to that of S. elegans in all respects. 
The last whorl, in old specimens, is somewhat angulated, as im 
S. communis. 
This species is abundant in most of the pools and marshes 
around London. It is likewise not uncommon in Wiltshire. 
In all stages of growth it may be distinguished from S. elegans. 
It is found in all the ditches bordermg on the Surrey and 
Croydon canals, where S. elegans is found in great plenty : 
but they are never found together. 
F5 
