Occasionally the longitudinal disposition of the tubercles pre- 

 vails over the transverse, in which state the species has been 

 re-described by Reeve as T. moritinctus (fig. 81). This, and 

 intermediate forms are found in West Indian, as well as in Phil- 

 ippine Islands specimens. 



T. SARCOSTOMA, Reeve. PI. 10, fig 75. 



Intervariceal ribs not so numerous, and more prominent than 

 than in the preceding species. Yellowish brown. Lip tinged with 

 orange ; columella without the brown markings of T. cynoceph- 



alus. Length 2'5 inches. 



On the reefs, Isle of Ticao, Philippines. 



I admit this as a distinct species with some hesitation, as the 

 growth of one rib or nodule at the expense of two smaller ones is 

 not unusual in this and allied genera. 



T. TRILINEATUS, Reeve. PL 10, fig. 77 ; pi. 11. fig. 87. 



Longitudinal ribs distant, less prominent than the revolving 

 series ; shoulder of the whorls obtuse, defined by tubercles ; 

 body whorl a little attenuated below. Yellowish brown, whitish 

 on the prominent nodes and revolving ribs ; aperture white, 

 columella brown stained. Length 3 inches. 



Red Sea, Philippines, China. 



Mr. Reeve distinguishes his T. degrotus (fig. 87), from this 

 species by the less developed tubercles on the shoulder, and by 

 its having a varix on the back of the penultimate whorl : neither 

 of which distinctions holds good. I consider it a synonym. 



T. TESTUDINARIUS, Ad. & Reeve. PL 11, fig. 84. 



The longitudinal ribs are more developed than the revolving 

 ones, so that the shoulder of the whorls is less defined by 

 tubercles ; the canal is also longer than in trilineatus ; which it 

 greatly resembles. 



Chinese Sea. 



T. SINENSIS, Reeve. PL 11, fig. 85. 



White, more or less stained with pale yellow. 

 Length, 3*5 inches. 



Chinese Sea. 



