200 TRIVIA. 



the different distribution are sufficient to separate the two, and 

 I follow later monographers by adopting T. nivea. 

 This species is the T. scabriuscula, Kien., not Gray. - 



T. ORYZA, Lam. PL 21, figs. 82, 83, 79. 



Ovate, extremities produced, ribs fine, dorsal impression 

 long. Length, '30-'45 inch. 



Sandwich /s., Australia, Philippines. 



Dr. Dunker in " Mai. Blatt." for 1861, refers to a small variety 

 from the Red Sea, having only a faint dorsal sulcus. 



T. scabriuscula, Gray (fig. 79) is a variety characterized by 

 rather more produced rostrated extremities and a shorter dorsal 

 impression. 



T. oryza is as peculiarly East Indian as T. nivea is West 

 Indian. 



T. GRANDO, Gask. PI. 21, figs. 86, 87. 



' Smaller and more globose than the preceding, ribs extremely 

 fine and delicate, aperture rather wide, spire prominent. 

 Length, '26 inch. 



Manilla. 

 T. INSECTA, Mighels. PL 21, figs. 84, 85. 



Elongate ovate, subrostrate, ribs very fine, back depressed, 

 dorsal sulcus long. Length, -1--2 inch. 



Sandwich Islands, Australia. 

 Kiener called this species C. hordacea. 



T. VITREA, Gask. PL 21, figs. 88, 89. 



Globose, aperture rather narrow, and slightly curved inwards, 

 ribs coarse, texture pellucid. Length, '25 inch. 



Philippines. 

 Weinkauff thinks this species and T. sulcata belong together. 



T. GLOBOSA, Gray. PL 21, figs. 92, 93. 



Round like a pea, aperture very narrow, dorsal impression 

 sharply cut and reaching to the extremities. Length, -1--2 inch. 



West Indies ; Sandwich Is.; Australia. 



Described by Kiener as T. pilula and by Mighels as T. 

 sphserula. 



Weinkauff separates T. pilula, giving this name to the shell 



