125 



In very old or weathered specimens the transparency and colour 

 are lost, and the shell has a more dense appearance. Some old spe- 

 cimens have a curved longitudinal external streak of chestnut rising 

 from the umbilicus, and terminating near the base of the aperture at 

 the lower edge of the inner lip. Found on bushes. — W. J. B. 



Bulinus Nux. Bui. testd pyramidali, fused ; anfractibus 7 longi- 



tudinaliter rugosis ; umbilico medio cri : long. -}-§-, lat. tV poll. 

 Hab. ad Insulas Gallapagos. (Charles's Island.) 

 Found on bushes. — W. J. B. 



Genus Partula. 



Partula rosea. Part, testd ovato -pyramidali, rosed; anfractibus 

 6 longitudinaliter substriatis, lineis creberrimis sub-decussatis, ul- 

 timo maximo ; epidermide tenui : long. -£> lat. \ poll. 



Var. ol. purpureo-fusca. 



Far. /3. albida suturis et anfractus ultimi basi roseis ; epidermide 



Hab. in insula Huaheine. 



Found by Mr. Cuming on the Te plant. — W. J. B. 



Partula auriculata. Part, testd perforatd, ovato-pyramidali, 

 castaned ; anfractibus 6 subventricosis, longitudinaliter striatis ; 

 aperturd alba, quasi auriculatd, labiis complanatis crassis ; dente 

 in anfractds basalis faciem internam albo : long, -f-, lat. % poll. 

 Var. flavicans aperturse margine externo subroseo. 

 Hab. in Huaheine. 



The thick flattened lips forming the aperture of this species are so 

 disposed as to give the mouth, in many individuals, the appearance 

 of a key-hole, while in others it is ear-shaped. The white tooth on 

 the internal surface of the body whorl is not developed in some spe- 

 cimens. Found on bushes at Huaheine. — W. J. B. 



Partula varia. Part, testd ovato-pyramidali, subglabrd, levissime 

 longitudinaliter substriatd, subdiaphand, fused, fused subviridi- 

 fasciatd, vel anfractibus superioribus fuscis, ultimo flavente : 

 long. 44i fcf. A- poll. 

 Hab. in insula Huaheine. 



This pretty species, of which hardly two individuals are exactly 

 similar in colour, was found upon bushes. — W.J. B. 



Genus Planorbis. 

 Planorbis Peruvianus. Plan, testd discoided, pellucidd, utrinque 



concavd, anfractds basalis parte ultimd subdepressd ; aperturd 



subgibbd, subdilatatd : lat. X V, long. T V poll. 

 Hab. in Peruvia. ( Malabriga, province of Truxillo.) 

 Found in a muddy pond nearly dried up.— W.J. B. 



Genus Purpura. 



Purpura muricata. Purp. testd ovato-globosd, transversim quadri- 

 carinatd, carinis tuberculiferis imbricatis ; subalbidd lineis pallide 

 griseo-rufis cinctd ; columella flavescenti- earned j labro crenulato, 



