125 



In very old or weathered specimens the transparency and colour 

 are lost, and t'le shell has a more dense appearance. Some old spe- 

 cimens have a curved longitudinal external streak of chestnut rising 

 from the umlnUms, 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. testa pyramidali, fused ; anfractibus 7 longi- 



tudinaliter rugosis ; umbilico mediocri : long. ;-§-, lat. -rV poll. 

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

 Found on bushes. — W. J. B. 



Genus Partula. 



Partula rosea. Part, testd ovato-pyramidali, rosed; anfi'actibtis 

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

 timo maximo ; epidermide tenui : long. ^, lat. ^ poll. 



Var. IX. purpureo-fusca. 



Var. /3. albida suturis et anfractOs ultimi basi roseis j epidermide 

 flava. 



Hah. in insula Huaheine. 



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



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

 cnstaned ; unfractibxis 6 subventricosis, longitudinaliter slriatis ; ' 

 aperturd albd, quasi avriculatd, labiis cornplanatis crassis ; dente 

 in anfractus basalis faciem internam albo : long, f, lat. ^ poll. 

 Var. flavicans aperturee margine externo subroseo. 

 Hub. 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, testa ovato-pyramidali, subglabrd, levissim'h 

 longitudinaliter substriatd, subdiaphand, fused, fused subviridi- 

 fasciatd, vel anfraetibus superioribus fuscis, ultimo flavente : 

 long. 14, lat. ^^^ poll. 

 IJfib. in insula Huaheine. 



This pretty species, of which hardly two individuals are exactly 

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



Genus Plaxorbis. 

 Planorbis Peruvianus. Plan, testd discoided, pellucidd, utrinque 



eoncavd, anfraetus basalis parte ultimd subdepressd ; aperturd 



subgibbd, subdilatatd : lat. A. long. -x\ poll. 

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

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



Genus Purpura. 



Purpura muricata. Pvrp. testd ovato-glohosd, transversim quadri- 

 carinatd, earinis iubcrcuHferis imbricatis ; subalbidd lineis pallide 

 griseo-rufis cinctd i columelld favescenfi- earned ; labro crcnvlato. 



