182 TKIFORI8. 



T. arotmnanMUB, !>>h. PL 38,%. 8. 



Shining, whitish, marbled with che.-tnut ; whorls 1 4, narrow, with 

 t\v> .series of rounded tubercle-, last whorl with a peripheral earina 

 and several raised lines on the base. Length, 4 mill. 



Isle of Bourbon. 

 T. IVr.ii -i i :KI, Crosse. PL 38, fig. 9. 



Ratlin- thin, subtransluceiit, whitish, regularly maculated with 

 ehestnut. whorls Is, with three spiral rows of heads, the middle one 

 minute, the lower largest, and bordered below by a thread which 

 i- articulated with white and chestnut, base smooth. 



Length, 8 mill. 



Gulf of St. Vincent, N. Australia. 



T. MIRIFICUS, Desh. PI, 38, fig. 10. 



Yellowish white, whorls l.~>, narrow, each with two rows of pel- 

 lucid granules, and a wide concave interspace, on the body whorl 

 four rows of granules, which are smaller. Length, 7 mill. 



Isle of Bourbon. 

 T. DECORATUS, C. B. Adams. PL 37, fig. 4. 



White, maculated with somew r hat quadrangular large chestnut or 

 chocolate spots, with three nearly equal spiral rows of beads and 

 intermediate, narrow, deep channels, body whorl anteriorly with 

 two additional smaller, more or less beaded spiral ridges; whorls 

 16, planulate, the suture deeply grooved. Length, 14 mill. 



West Indies, Florida. 

 Section MASTONIA, Hinds, 1844. 

 T. VKM.X, BUB, Quoy. PL 38, figs. 11, 12. 



With convex sides and base, violaceus, whorls 20, suture slightly 

 grooved, whorls with two rows of tubercles, which arc rounded, rosy 

 white. Length, 8-10 mill. 



New Caledonia, New Ire/a ml, }'!ti Is. 



T. ])iirn.*i //x/3, Jouss. (fig. 12), was separated because it has only 

 one canal-opening, whilst the true rio/nrm* has a dorsal one remain- 

 ini:; a merely individual difference, as I have explained. 



T. EKJBBB, Hinds. I'l. 88, figi. l-VKi. 



I'ink, with the two row- of granules on each whorl, which are 

 "ften yello\vi>h. Hitmv marked by a raised line. Leii-th. '. mill. 



/i'i-/iinil. Tahiti. ItU of Bourbon* 



T. rOMNM, Hind- (fig, 1 \ >. appear- to ditler only in the interposi- 

 tion of a minute additional >erie> of tubercle-: a condition fore- 



