810 



White, polished, shining, umbilicated, with the last whorl large 

 and rather angulated; in general appearance resembles 0.j)er- 

 foratus, but the umbilicus is very narrow. 



Loay, island of Bohol; sixteen fathoms, sandy mud. H. C. 

 (Mus. Cuming.) 



19. Obeliscus perforatus (pi. clxxi. f. 9), A. Adams. 



O. testa conico-turrita, late et profunde umbilicata, alba, nitida, 

 Igevissima ; anfractibus planiusculis, ultimo subangulato, linea 

 pallida rufa transversa, in medio, ornatis ; apertura subquadrata ; 

 columella recta, plicis tribus, transversis, instructa. 



Very widely and deeply umbilicated, wliite, shining, orna- 

 mented with a transverse rufous band ; aperture jather quadran- 

 gular ; columella with three transverse plaits. 



St. John^s, West Indies ; on the sands. Dr. HornhecL (Mus. 

 Cuming.) 



20. Obeliscus brunneus (pi. clxxi. f. 35), A. Adams. 



O. testa turrito-subulata, nitida, longitudinaliter substriata, 

 brunnea; anfractibus convexiuscuhs, frequentibus, ad suturas 

 crenulatis, anfractu ultimo rotundato ; apertura ovali, antice effusa; 

 columella antice reflexa, dilatata, postice plica valida, producta in- 

 structa. 



A handsome red-brown species, with rather convex whorls and 

 the sutures crenulated ; the whorls are very numerous, and there 

 is but a single plait on the columella. 



Japan. Dr. Siebold. (Mus. Cuming.) 



21. Obeliscus scitulus (pi. clxxi. f. 23), A. Adams. 



O. testa ovato-turrita, subperforata, alba; spira acuta; anfrac- 

 tibus convexiusculis, longitudinaKter et transversim striatis, fasciis 

 rufescentibus et macuhs fuscis variegatis; apertura ovali, antice 

 producta, varice striato circa regionem umbilicalem instructa ; co- 

 lumella recta, phcis tribus munita. 



Species somewhat resembling 0. ventricosus, but is smaller and 

 less ventricose, and the markings are also very different. 



Island of Masbate ; sandy mud, ten fathoms. H. C. (Mus. 

 Cuming.) 



22. Obeliscus stylinus (pi. clxxi. f. 28), A. Adams. 



O. testa turrita, subulato-cylindracea, apice acuto, acuminato ; 

 alba, nitida, subpellucida, transversim striata ; anfractibus planis, 

 ultimo, sulco transverso angusto instructo ; apertura subquadrata. 



