TRIFORIS. 189 



Section VIRIOLA, Jousseaume, 1884. 

 T. VITTATUS, Hinds. PL 39, fig. 57. 



Smooth, corneous, with a central dark brown line ; whorls 22-25, 

 with two subequal spiral ridges and alternate sulci. 

 Length, 18 mill. 



Straits of Malacca. 



T. BAYANI, Jouss. PI. 39, fig. 56. 



Solid, reddish-purple, a little shining; whorls 23, with three 

 spiral carinse, the interstices clathrate, suture linear, thread-mar- 

 gined, last whorl 5-carinate , aperture white, brown-zoned. 



Length, 17 mill. 



New Caledonia. 



Is very probably a synonym of the next species. 



T. COKRUGATUS, Hinds. PI. 39, fig. 59. 



Corneous ; whorls 17-20 tricarinate, the middle carina smaller, 

 corrugated between them, suture with a thread-like margin. 

 Length, 15 mill. 



New Guinea. 



T. CONNATUM, Montr. PI. 39, fig. 60. 



Whorls exceeding twenty, with three or four cingulse, the wider 

 interstices longitudinally punctate ; chocolate color. 



Length, 13-15 mill. 



New Caledonia. 



T. DUNKERI, Jouss. PL 39, fig. 61. 



Rather solid, brownish ; whorls 14-16 with two strong and one 

 thin revolving ribs, the interstices longitudinally costulate and 

 spirally striate : base planate. Length, 9 mill. 



Japan. 



Described by Dunker as T. cingulata, preoccupied by A. Adams. 



T. ELEGANS, Hinds. PL 39, fig. 62. 



White, marbled with chestnut ; whorls 16-18, quadricarinate, 

 carinse alternating in size, close, maculated with white and chestnut. 



Length, 10 mill. 



Straits of Malacca. 



T. CANCELLATUS, Hinds. PL 39, fig. 64. 



Whorls 15-18, yellowish brown, bicarinate, the carinse maculated 

 with white, cancellated between them and marked by alternate 

 chestnut and white longitudinal lines ; suture channeled. 



Length, 10 mill. 



Straits of Malacca. 



