566 



posteriorly narrowed, anteriorly greatly dilated, inner lip arched, 

 rounded anteriorly. 



St. Vincent's, West Indies, Guild. Mus. Cuming. 



Animal covered with a network of red-brown lines. 



10. Bulla albo-cincta. (pi. cxx. f. 17, 18), Hoeven, 

 Leyden Journ. Nat. Hist. d. 6. st. 4. p. 10. 



B. testa subglobosa, tenui, subpellucida, fusco-cinerascente, 

 fasciis tribus, latis, albis, transversim picta, striis fuscis, longi- 

 tudinalibus, obliquis. 



Shell subglobose, thin, semipellucid, ashy, fuscous, with tlu-ee 

 broad, white, transverse bands, and numerous obhque brown strise. 



China. Mus. Cuming. 



Sub-genus Toenatina. 



11. Bulla voluta (pi. cxxi. f. 24), Q,uoy, Voy. de T Astro- 

 labe, pi. 26. f. 33-35. 



B. testa elongata, minima, laevi, cylindrica, alba; spira promi- 

 nente ; apice acuto ; suturis latis, profundis. 



Shell elongated, small, smooth, cylindrical, white ; spire pro- 

 minent ; apex acute ; suture of the whorls wide and deep. 



Island of Guam. Mus. Cuming. 



12. Bulla canaliculata (pi. cxxi. f. 25). BuUina canali- 

 culata, Saij, Amer. Conch, pi. 39. Volvaria canaliculata, 8ay. 



B. testa cylindrica, alba, nitida, lineis incrementi evanidis ; 

 spira elevatiuscula ; apice prominente ; anfractibus quinque, sulco 

 rotundato prEccUtis; labro antice arcuato; columella pHca una 

 obHqua ad basin. 



Shell cylindrical, white, shining, with evanescent lines of growth ; 

 spire rather elevated; apex prominent; whorls five, furnished 

 with a rounded groove ; outer lip anteriorly arcuated ; columella 

 with a single oblique fold at the base. 



Carohna, U. S. Mus. Metcalfe. 



13. Bulla mammillata (pi. cxxi. f. 26), Pliilijopi, Enum, 

 Moll. Sicil. vol. i. t. vii. f. 20. 



B. testa minuta, cylindrica, longitudinahter substriata ; vertice 

 truncate ; medio papillate ; spira conspicua, truncata, anfractibus 

 tribus, quorum primus papiUam elevatam sistit ; apertm'a superne 



