Dr. Cantor ou the Flora and Fauna of Chusan. 33 



Lagiinculn, nov. gen. Testa turbinatii, subglobosii, apertura majori, 

 intcg-ra, oblonga ; peristomate interrupto ; labio subreflexo ; umbilico 

 profundo tortuoso. 



*Laguncula pulchella. Testa albido-glauca, ovato-globosa ; anfrac- 

 tibus convexis, lineis longitudinalibus elevatiusculis aliisque obliquis 

 decussatis instructis ; suturis impressis ; aperturti intus fascia latcl 

 pallide castanea ornata columellaque intus concolore. 



Habitat. Said to inhabit canals. 



*Melania cancellata. Testa elongato-turrita, olivacea, solidiuscula, 

 anfractibus novem convexiusculis, omnibus costulis frequentibus, ul- 

 timoque fasciis tribus elevatis basalibus munitis ; costulis liris pluri- 

 mis cancellatis ; suturis mediocriter excavatis ; apice eroso. Axis 

 I'O poll. V. paulo plus. 



Habitat. Canals. 



*Melania (Hemisinus ? Swainson) crebricostis. Testa elongato- 

 turrita, olivacea, tenui, anfractibus plurimis leviter convexis ; costis 

 frequentissimis albidis, Isevigatis, munitis, ultimo costulis evanidis, 

 balteo submediano, rugisque plurimis basalibus circumdato ; suturis 

 impressis ; columella subrecta ; basi leviter canaliculato-effusa ; labro 

 tenui, Isevi, subreflexo, apice decoUato. Axis testae decollata; 1 -05 poll. 



Habitat. Found with the preceding, but scarce. 



Batillariaf, nov. gen. Testa turrita, insculpta, rudi ; anfractibus 

 plurimis ; apertura oblonga, infra angustiore, basi truncata, evasa ; 

 labro sinuato, supra emarginato, infra provecto, labio supra callo 

 munito ; columella planata, basi incrassata, oblique truncata, cana- 

 lem vix efFormante ; operculo corneo, tenui, spirali, multiverticillato. 



Batillaria zonalis {syn. Cerithium zonule, Lamarck, L'Ocean des An- 

 tilles ; C. zonule. Gray, China, Griif. Cuv. xii. pi. 14.). Testa elon- 

 gato-turrita, scabra, albida, fasciis fuscis ornata; anfractibus tredecim, 

 mediocriter convexis, costulis liris longitudinalibus decussatis, sujira 

 subnodulosis ; apertura intus fasciis fuscis strigata ; columella alba. 

 Axis 1-4 poll. 



Habitat. The coast. 



ACEPHALA. 



Testacea. 



*Arca galactodes. Testa subrhomboidea, tumida, subajquilaterali, 

 antice subangulata, postice rotundata, multiradiata ; radiis exilissi- 

 mis auctus rugas decussantibus ; cardine mediocri terminis exteriori- 

 bus angulatis ; natibus Isevibus remotiusculis, incurvatis ; margine 

 la2vi ; epidermide fusca. Lat. 0-75, long. 0'5 poll. 



Habitat. Said to inhabit canals. 



*Mytilus niger. Testa oblonga, trigona ; cardine unidentato ; na- 

 tibus sub incurvatis, decorticatis, sub epidermide albis, marginibus 

 purpurascentibus ; intus margaritaceo-splendida, margine purpureo. 

 Long. 3-4 poll, lat. 1-7. 



Habitat. Said to inhabit canals. 



*Dreissena purpurascens. Testa oblonga subquadrata, radiato-pli- 



\ Batilla, a shovel, from ^ the lengthened form of the shell.' and the con- 

 formation of the base of the aperture. 



D 



