584 



rotundata, longitudinaUter striata, sub lente lineis traiisvcrsis 

 mimitissimis ; labro sequaliter arcuato. 



Shell roundly ovate, thin, horny, semipellucid, rounded at both 

 ends, longitudinally striated under the lens, with very fine trans- 

 verse lines ; outer lip equally arched. 



Had. ? Mus. Cuming. 



78. Bulla succinea (pi. cxxiv. f. 106), Conrad, Proc. 

 Acad. Nat. Sc. Phil. 1846. Feb. pi. i. f. 5. 



B. testa cylindrical, pertenui, diaphana, succinea, lineis confertis 

 transversis cincta ; columella concava, ad basin canaliculata ; labro 

 recto, postice producto. 



Shell cylindrical, very thin, diaphanous, of an amber colour, 

 marked with crowded minute revolving wrinkled lines ; columella 

 concave or channelled towards the base; outer lip straight, the 

 hind margin above the line of the apex. 



Tampa Bay. Mus. Metcalfe. 



78 a. Bulla castanea (pi. cxxiv. f. 106 a), Adams. 



B. testa solida, oblongo-ovali ; spira umbilicata, albida, epider- 

 mide fusco-ferruginea tecta, lineoHs creberrimis transversis sub 

 lente insculpta, lineis anticis conspicuis, distantioribus, longitudi- 

 naliter substriata ; labio antice albo, incrassato ; apertura, intus 

 albida. 



Shell solid, oblong, oval ; spire umbihcated, whitish, covered 

 with a brown ferruginous epidermis, engraved (under the lens) with 

 very fine close-set lines, the anterior ones very distinct and wide 

 apart, longitudinally substriated; inner lip anteriorly white and 

 thickened ; aperture white within. 



Shores of New Zealand ; 4 fathoms, mud. 



SUB-GENUS ATYS. 



79. Bulla naucum (pi. cxxiv. f. 107-109), Linn., Gmel. 

 p. 3424. 



B. testa, rotundata, pellucida, utrinque subumbilicata, undique 

 transversim striata, alba. 



Shell rounded, pellucid, somewhat umbilicated at both ends, 

 transversely striated throughout, white. 



Philippines, Borneo ; on muddy sand-banks. Cuming, 



