807 



A white, sharply-acuminated species, surrounded with a single, 

 clear, broad, olive-brown belt. 

 Philippines. (Mus. Cuming.) 



7. Obelisctjs gracilis (pi. clxxi. f. 4), BroccH (Pyrami- 

 della), Conch. Subapp. pi. 6. f. 6 a b ; Kien. Mon. Pyramid, pi. 2. 

 f. 7. 



O. testa cylindrica, angusta, apice acutissima, nitida, albida; 

 spira elongata ; anfractibus convexiusculis, frequentibus, sutura 

 simplici, depressa ; apertura parva, oblonga. 



A slender, subulate, shining species, with from four to six 

 whorls, the last divided in the middle by a transverse groove; 

 columella nearly straight, with three plaits. 



St. Just, Valterra, France. (Mus. Cuming.) 



8. Obeliscus sulcatus (pi. clxxi. f. 34), A. Adams. 



O. testfi turrito-subulata, longitudinaliter striata, albida, cine- 

 reo-nebulosa, et maculis rufis sparsim punctata; anfractibus con- 

 vexiusculis, ultimo rotundato ; apertura ovali, antice canaliculata ; 

 columella arcuata, plicis tribus instructa. 



I have used a manuscript name of Nuttall's. The species re- 

 sembles 0. punctatus, but the whorls are more ventricose, and the 

 style of colouring is very different. 



Tahiti; coral sand. Mus. Cuming. 



9. Obeliscus tueritus (pi. clxxi. f. 17), A.-Adams. 



0. testa subulato-turrita, longitudinaliter striata, fulvescente, ad 

 suturas alba; anfractibus planiusculis, frequentibus, ad suturas 

 crenulatis, suturis profundis, anfractu ultimo rotundato, sulco 

 transverso instructo; apertura ovali, antice producta, subcanali- 

 culata ; columella recta, tortuosa, phcis tribus munita. 



In this species the whorls are very numerous, and white at the 

 sutures, which latter are crenulated, and the aperture is produced 

 in front. 



Albrochos Island, North Australia ; stones, low water. /. E. 

 Bring. (Mus. Cuming.) 



10. Obeliscus teres (pi. clxxi. f. 31, 32), A. Adams. 



O. testa turrito-subulata, apice acuto, albida ; anfractibus iinme- 

 rosis, planulatis, lineolis fuscis transversis, et fasciis undulatis, 

 longitudinalibus, ornatis, suturis profundis, canaliculatis ; apertura 

 ovali, antice producta, subcanaliculata ; columella tortuosa, plicis 

 tribus instructa. 



