l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.98 



margin ; the second and third teeth are very much alike in size and 

 shape, the third is slightly less stout than the second, both are more 

 or less subequal in length of outer margin and both are longer than 

 the first ; the fourth tooth is the smallest, perhaps half the size of the 

 third, but in no sense rudimentary; fifth not shorter than any of the 

 others, but more slender, and so appearing rather long. 



The lateral, as well as the frontal teeth of our species in relative 

 size are very similar to the other two species with which it is compared. 



The basal antennal joint is about as long' as the orbit is wide. It is 

 provided with a high, prominent crest, plainly visible in dorsal view. 

 This crest, to all appearances, is fairly smooth and unarmed, but, on 

 close inspection with considerable magnification, is seen to be slightly 

 roughened or obsolescently nodulated with low, irregularly placed 

 swellings of its upper margin, more to one side or the other than 

 actually on the margin itself ; the crest is neither denticulate nor spined, 

 it might be called obscurely granulate, but it is more lumpy than 

 granulate ; either side of the crest, lower down, the surface of the 

 joint is small tuberculate ; these little, more or less low conical tubercles, 

 are larger on the proximal end of the joint than distally. I am of the 

 opinion, although I have seen no specimens of T. alcocki, that the crest 

 of its basal antennal joint may be much like that of T. roosevelti here 

 described. This crest in T. gardineri, as it is not contrasted with 

 exetastica in Borradaile's remarks, must, by implication, be, as in that 

 species, very plainly denticulate, for, as figured, it appears more or 

 less saw-toothed. 



Either hand of the nearly subequal chelae has a blunt squamose 

 ridge on its inner face ; the inner upper margin is armed with two 

 stout spines, of which the posterior, arising behind middle of palm is 

 larger, longer, and stronger, the anterior spine is a little behind the 

 distal margin of the palm ; on the outer margin of the upper surface 

 of the palm is another strong spine about the size of the anterior one 

 on the inner margin ; on the outer margin, just behind the distal border 

 of the palm, is a blunt, conical tubercle ; there is another strong, stout, 

 sharp spine on the palm at the carpal articulation, the fourth of those 

 arming the chela ; on the outer surface of the palm is a low, squamose 

 ridge running from below this last mentioned spine to the articula- 

 tion of the movable finger ; below this ridge are two other better de- 

 fined, crenulate ones ; the upper one is the stronger, with larger crenu- 

 lations, anteriorly it bends downward a little, to be continued on to 

 the outer side of the fixed finger as a more or less smooth, noncrenu- 

 late carina ; the crenulations of the lower ridge, as it runs on to the 

 finger, become progressively smaller until they fade out, so that the 



