10 



Genus TIARA. 



Tiara, Bolten, 1798, Mus. Bolten. 

 Melania, Lamarck, 1799 et auct. 

 Turritella, Link, non Lamarck. 

 Ellistoma, Rafinesque. 

 Melanites, Krugel. 

 Hygronoma, Gistel. 



TYPE, Helix amarula, Linn. : Mauritius ; Madagascar ; Comoro 

 Islands. 



Range. Tropical Islands of the Indian Ocean and Moluccas. 



Shell ovate ; spire and aperture of nearly equal length ; whorls 

 coronated with spines or tubercles ; aperture ovate, entire in front, 

 pointed behind ; inner lip very thin ; outer lip simple, acute. 



19. Tiara cybele (Gould). 



Tiara cybele (Gould;, Proc. Boston Soc. Nat. Hist, ii, 1847, p. 222 (as 



Melania cybele). 



Melania crenularis, Deshayes, Mag. Zool. 1884, pi. 83 ; Nevill, Hand 

 List, pt. 2, p. 279. 



Original description : Testa ovata, turrita, crassa, f uliginosa, 

 epidermide velutina induta ; spira ad apicem valde erosa, anfr. 

 superstit. ad 3 planulatis, superne tribulatis, et pinnis curtis acutis 

 arrectis ordinatim dispositis corouatis ; apertura angusta, elongato- 

 ovalis, postice angulata ; intus livida. 



Alt. 25, diam. 15*5 mm. 



Hob. Fij i, Navigators' Islands, etc. 



Var. amara (March), J. de Conch. 1872, p. 319, as Melania 

 amara, for M. mitra, Reeve (not of Meuschen), Con. Icon. sp. 175. 



Original description : Shell ovate, ventricose, black-brown, 

 sometimes covered with a soft epidermis ; whorls few, smooth, 

 sharply coucavely angled at the upper part, prickly-tubercled at 

 the angle; aperture obliquely ovate ; colurnella callously effused, 

 interior sometimes blood-stained. 



Alt. 47, diam. 24-5 mm. (fig. 6 in Conch. Icon.). 



Hob. Sumatra (Cuming) ; Pulo Panjang (Morch) ; Great Nicobar 

 (Roepstorff). 



Melania, Lamarck, b'eing an absolute synonym of Tiara, Bolten, 

 and as none of the names used in the genus appear to be 

 applicable, the author proposes the subgeneric name Radina for 

 the following group. 



Subgenus RADINA, nov. 

 Melania, H. & A . Adams, 1855 ; Brot, 1874. 



TYPE, Melania hastula, Lea : Philippines ; Fiji ; Halmaheira ; 

 Aru Islands. 



