14 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



bead. In placing the present shell here we are only anticipating this necessary 

 change. Several peculiarities will be found in this shell ; it is solid and heavy, 

 somewhat fusiform, and of an uniform cream colour ; the two last whorls turbinate 

 and on the same plane, whence the spire, consisting of about nine whorls, 

 suddenly ascends ; the last whorl smooth, squarish, at about its inferior third 

 suddenly contracted, those of the spire with nodulous ribs grooved transversely ; 

 aperture elongated, slightly flesh coloured, below attenuated into a canal ; outer 

 lip thin, sharp, and perfectly smooth within ; no distinct inner lip ; columella 

 about its centre remarkably curved, above with a large squarish callosity, below 

 also slightly callous where it partially covers a small umbilicus, quite smooth 

 everywhere ; and with a few fragments still adhering of a thin horny epidermis. 



Trophon. Montfort. 



Troplion, Montfort, 1810. lluricidea, Swainson, 1840. 



34. Trophon jimbriatus, (Plate I. fig. 18, 19.) Testa fusoidea, pallida; anfractibus angulatis, 

 costatis, lamellis erectis frequentibus muricatis ; apertura ovata lactea ; canali recurvo. 



Inhab. Straits of Macassar. In eleven fathoms, among sand and gravel. 



Shell solid and fusiform, the upper whorls crossed by two rounded ribs, the 

 last by several gradually decreasing in size from the upper to the lowest ; these 

 latter crossed vertically by numerous rigid sharp erect lamellae, which are given 

 off from the surface of the ribs, carried across the interspaces, and confluent with 

 each other. The aperture is polished and smooth, but somewhat distant sulci 

 exist on the outer lip corresponding with the exterior ribs. The canal is bent 

 backwards, and a little to one side. 



35. Trophon gyratus, (Plate I. fig. 14, 15.) Testa, fusiformi, albida ; anfractibus prope mediam 

 unicarinatis ; carina, crenata ; undique costulis parvis numerosis eleganter creniferis vestita. ; canali 

 subrecurvo. 



Inhab. Straits of Macassar. In seventeen fathoms, coarse sand. 

 Besides the principal keel, the whole shell is covered by small ribs sculptured 

 with the most delicate crenulations. 



36. Trophok muricatus, (Plate I. fig. 16, 17.) Testa fusiformi; anfractibus uniseriatim 

 s|jinis compressis muricatis, ultimo serie altera minore ; labio interno subproducto ; canali ad dextram 

 inclinato. 



Inhab. Panama. In nineteen fathoms, among mud. 



Equally characteristic with the preceding, from its spiral series of trans- 



