Dr. Cantor on the Flora and Fauna of Chusan, 487 



reflexo planato, ad labii basin plica obliqua solida, sulcoque concur- 

 rente munito. Axis I'l poll. 



Habitat. In the earth. 



*Clausilia aculus. Testa subulata nitida, epidermide fuscescenti, 

 anfractibus 10 aut 11, obHque leviter striatis ; apertura dentibus 

 duobus vel tribus munita, peristomate reflexo. Axis longior 0*65, 

 minor 0*5 poll. 



Habitat. In the earth, on mossy stones, walls and trees. 



*Achatina erecta. Testa albida solidiuscula subulato-turrita, epi- 

 dermide foeda, scabra ; anfractibus octo, planulatis, suturis impressis ; 

 apice obtuso. 



Habitat. Same localities, and in company with Clausilia aculus. 

 Common at Macao, where however C. aculus is not found. 



Aquatica. 



*Planorhis papyraceus. Testa compress^, olivaceo-comea, subpo- 

 lita, minutissim^ radiato-striata ; anfractu ultimo latiori, supra infra- 

 que sequaliter convexo ; peripheria carinata, spira basique ambabus 

 depressis, umbilicatis, umbilico inferiori arctiori ; labro superiori 

 valde prominente, semicirculari, inferiori recedente, recto. Diam. 0*4 

 poll. 



Habitat. Canals, ponds, attached to Chara. 



*Planorbis hemisphcerula. Testa nitida, olivaceo-comea, supra 

 convexa, apice planulata, infra excavata, umbilico coarctato, peri- 

 pheria obtusa, nullo modo carinat^. Diam. 0*25 poll. 



Habitat. Same localities as P. papyraceus on Chara and Lemna. 



Planorhis compressus, Hutton. 



Habitat. Same localities as the preceding. Inhabits also Bengal. 



*Lymnaia plicatula. Testa elongato-ovata, cornea, scabriuscvila ; 

 anfractu ultimo transverse plicatula, suturis impressis ; spira medio- 

 cri, apice acuto plerumque ferrugineo ; aperturji infrk patulante, basi 

 evas^. 



Habitat. Ponds. 



*Lymn(£a minor. Testa ovato-acuta, cornea, polita ; spira vix di- 

 midium testae efformante, apice obtusiusculo ; anfractibus quatuor, su- 

 turis leviter impressis ; apertura ovata, plica columellse obsoleta. 



Habitat. Same locality as the latter. 



Tectibranchiata. 



*Bullcea caurina. Testa ovato-oblonga, alba, tenuissima, papyracea, 

 transverse eleganter minutissim^que striatula; apertura auriformi 

 supra angustatd, infra patulante ; labro apicem superante ; spira 

 nulla. 



Habitat. Said to inhabit canals. 



Pectinibranchiata. 



*PaIudina quadrata. Testd elongate- conoidea, crassa, epidermide 

 viridi-olivacea, anfractibus sex planulatis, leviter transverse plicatis, 

 longitudinaliter liratis ; liris subquinis ; apertura mediocri, intiis al- 

 bida violacea ; umbilico arcto, peritreraate nigrescente. 



Habitat. Canals and pon4s. 



