208 SPART EBRANCHIA. 
2. PaLupIna ACHATINA. 
P. testa spira depressiusculd ; anfractibus ventricosis, transver- 
sim striatis, et longitudinaliter fusco-fasciatis. 
Nerita fasciata, Miill. Verm. 182. no. 369. 
Cyclostoma achatina, Drap. Hist. des Moll. Terrest. et Fluv. 
36. t.1. f. 18; Lam. Hist. Nat. des Anim. sans Vert. vi. 
174. 
Paludina achatina, Brug. Encycl. Méth. t. eecclvii. f. 1. a, 6. 
Helix fasciata, Gmel. Syst. Nat. 3646. no. 106; Gualt. Test. 
tot. M.. : Seba; Mus. ii. t. xxxixif.S37 344 
Animal, corpore nigricante, cinereo-flavo sparsum ; punctis 
confluentibus. Tentacula aterrima fulvo-punctata. Oculi 
atri. 
Habitat in fluvio Camo vulgatissima. 
Shell with the spire depressed ; whorls ventricose, trans- 
versely striated, and longitudinally banded with fuscous-brown. 
Animal: body blackish, sprinkled with greyish yellow spots ; 
the spots confluent. Tentacles deep black, spotted with fulvous. 
Eyes black. 
Inhabits the river Cam. 
This species was first discovered as a British species by my 
friend, J. S. Henslow, Esq., Professor of Geology in the Uni- 
versity of Cambridge : it is found plentifully in the river Cam. 
Genus 96. BirHynta. 
Cyclostoma Draparnaud. 
Testa conicé elevata. Spira acuta. Sutura profunda. 
Animal tentaculis duobus elongatis apicem versus gradatim 
attenuatis, acutis, ad basin externé subabrupté dilatatis, oculi- 
geris. Ocul parvi, vix convexi. Operculum testaceum, pos- 
ticé in angulum productum, nucleo ceutrali. 
Shell conically elevated. Spire acute. Suture deep. 
Animal with two elongated tentacles gradually attenuated 
towards their extremities, at their bases somewhat abruptly 
externally dilated and bearing the eyes. . Eyes small, scarcely 
