Mr. 11. B. Hinds's Descriptions of new Shells. 17 



Triphoris, Deshayes. 

 Testa pan-a, gracilis, plerumque elongata, sinistra ; carinas et tuber- 

 cula trausversim disposita, canalis tubularis obliquus ; sinus late- 

 ralis plus minusve coarctatus vel tubiformis. 



Geog. As far as our present knowledge acquaints us, the genus 

 would appear most numerous in the Indian seas, particularly in the 

 Straits of Malacca. Though much attention was bestowed on small 

 shells along the western coast of America, yet not a single species 

 was met with. In crossing the Pacific to the westward, a solitary 

 species was first seen at Bow Island ; apparently Triphoris adversus. 

 At New Ireland a few more were noticed, though not T. violaceus 

 (Cerithium violaceum, Quoy). On the shores of New Guinea they 

 were still more frequent ; and those from the Straits of Malacca are 

 particularly interesting shells. They occur in the United States, and 

 a local species is described, T. nigrocinctus {Cerithium nigrocinctum, 

 Adams). A few from our own shores and the Mediterranean are well 

 known, and in the West Indies they would seem to be frequent. The 

 genus is both littoral, and found in deep water. 



1. Subgenus Ixo. 

 Testa cylindracea, elongata, acuminata. 



1. T. gigas. 'J'esta valde elongata; anfractibus 25 — 28 planulatis, 

 quadriseriatim granulosis, inferiore paululum maxima ad basin 

 granulorum punctatis. Axis 11 lin. 



Geog. New Guinea; dredged from a muddy bottom at 18 fathoms. 



This is the largest species with which I am acquainted. 

 The colour would appear to be brown, but, as the specimens 

 are dead, this cannot be relied on. 



2. T. concors. Testa cylindracea ; anfractibus viginti-duo triseria- 

 tim granulosis ; serie media paululum minima ; sutura lineata ; 

 apertura rotundata ; sinu laterali tubiformi. Axis 6 lin. 



Geog. Straits of Malacca; in 18 fathoms. 



3. T. sculptus. Testa pallide rufente ; anfractibus 15 — 18 biseriatim 

 granoso-carinatis, medio lacvigatis carina secundaria ; prope sutu- 

 ram carinula moniUfera; sinu laterali patulo. Axis 4^ lin. 

 Geog. Straits of Malacca ; in 23 fathoms. 



4. T.vittatus. Testa laevigata, cornea; anfractibus "22 — 25 trans- 

 versim leviter sulcatis, medio fusco elegantissime vittatis ; aper- 

 tura subquadrata ; sinu laterali obsolete. Axis 8 lin. 



Geog. Straits of Malacca ; in 23 fathoms. 



5. T. bilix. Testa attenuate pallida ; anfractibus quindecim trica- 

 rinatis ; carina inferiore paululum maxima marmorata, media mi- 

 nima ; apertura rotundata ; sinu laterali patulo. Axis 3 lin. 

 Geog. Straits of Malacca ; dredged from a muddy bottom in 20 



fathoms. 



6. T. Metcalfeii. Testa alba fusco marmorata ; anfractibus nume- 

 rosis tricarinatis ; carina inferiore maxima fusco maculata, duobus 

 superioribus parvis, media minima ; sutura carinata. Axis 7 lin. 

 Geog. Pacific Ocean ? Cab. Metcalfe. 



Ann. ^ Mag. N. Hist. Vol. xi. C 



