SPARTHEBRANCHIA. 207 
Animal : os rostriforme. Tentacula compressa, ad apices acu 
‘minata, ad basin extern’ abrupt dilatata, oculigera. Operculum 
corneum. 
Shell elevated. Suture deep. Aperture round. 
Animal. Mouth rostriform. Tentacles compressed, acu- 
minated at their extremities, at their bases externally abruptly 
dilated, and bearing the eyes. Opereulum horny. 
The young animals swim in the water in the same manner as 
the Limnade. 
1. PALUDINA VULGARIS. 
P. testa spira elevata ; anfractibus ventricosis, transversim stria- 
tis, et longitudinaliter fusco-fasciatis ; sutura mediocri. 
Helix vivipara, List. Anim. Ang. t. u. f. 18; Conch. t. exxvi. 
f. 26; Act. Angl.t.ev.f.17; Donov. Brit. Shells, t. xxxvii. ; 
Mont. Test. Brit. 386; M. §& R. Trans. Linn. Soc. vii. 
205; Dill. Desc. Cat. 883; Turt. Conch. Dict. 59. 
Nerita vivipara, Miill. Verm. 1. 182. no. 370. 
Cochlea vivipara, Da Costa, Brit. Conch. \xxi. t. vi. f. 2. 
Cyclostoma viviparum, Drap. Hist. des Moll. Terrest. et Fluv. 
ae tat: f. 16. 
Vivipara fluviorum, De Montfort, 246. 
Limneea vivipara, Flem. Edinb. Encycl. vi. 77. 
Helix compactilis, Pult. Cat. Dorset. 48. 'Testa junior. 
Paludina vivipara, Lam. Hist. Nat. des Anim. sans Vert. vi. 
173. 
Animal nigrum. Caput et tentacula maculis paryis, distine- 
tis notata. Pes et /atera punctulis confiuentibus irroratis. 
Habitat in fluviis lente fluentibus, stagnis et paludibus, vulgaris. 
Shell with the spire elevated ; whorls ventricose, transversely 
striated and longitudinally banded with fuscous. Suture mode- 
rate. 
Animal black; head and tentacles marked with distinct, 
small spots; foot and sides sprinkled with confluent little points. 
Inhabits rivers flowing gently, ponds and marshes. Found 
in abundance in the Thames near Lambeth Church, and like- 
wise near Battersea Fields at low tide. 
