579 



57. Bulla virescens (pi. cxxiv. f. 83), Sowerly, Cenera, 

 no. xxxix. f. 2. 



B. testa subovali, aperta, virescente, semipellucida, versus spi- 

 rant valde angustata, longitudinaliter substriata, lineis transversis 

 minutissimis (oculo nudo inconspicuis) ; apertura ampla, antice 

 dilatata, postice coarctata, labro superne producto, postice inflexo. 



Shell suboval, open, greenish, semipellucid, greatly narrowed 

 towards the spire, longitudinally substriated, with very minute 

 transverse lines (not visible with the naked eye) ; aperture wide, 

 anteriorly dilated, posteriorly contracted ; outer lip produced above, 

 posteriorly indexed. 



Pitcairn's Island ; on rocks at low water. Cuming. 



58. Bulla insculpta (pi. cxxiv. f. 84), Totten, Silli- 

 man's Journ. xxviii. 350. fig. 4. B. solitaria, Say. B. Rein- 

 hardi, Hold. 



B. testa albo-cserulescente, fragili ; anfractu ultimo amplo, lineis 

 transversis minutis ; apice umbiUcato. 



More oval than B. liydatis, and of a peculiar bluish-white 

 colour ; the sculpture is the same. 



North America. Mus. Cuming. 



59. Bulla oryza (pi. cxxiv. f. 85), Totten, Silliman's 

 Journ. xxviii. 350. f. 5. 



B. testa minuta, alba, nitida, subovali ; anfractu ultimo amplo, 

 striis paucis transversis sculpto ; apice depresso, imperforato. 



Shell minute, white, shining, suboval ; the last whorl large, 

 with a few transverse striae ; apex depressed, imperforate. 



Massachusetts. 



60. Bulla Natalensis (pi. cxxiv. f. 86), Krauss, Sudafrik. 

 Moll. p. 71. Tab. iv. f. 14. 



B. testa ovato-globosa, subventricosa, tenuissima, pellucida, 

 nitida, flavo-virescente, longitudinaliter striata; vertice subumbi- 

 licato ; apertura ampla, antice dilatata ; margine externo arcuato, 

 superne producto, rotundato. 



Shell ovately globose, subventricose, very thin, pellucid, shin- 

 ing, yellowish-green, longitudinally striated, apex somewhat um- 

 bilicated ; aperture wide, anteriorly dilated ; outer margin arched, 

 superiorly produced and rounded. Length 4'4, lat. 3'3 lines. 



Shores of Natal. Mus. Cuming. 



4 F 



i 



