48 Bulletin Vanderbilt Marine Museum, Vol. VI 



above the base of the uropoda, with the epimera narrow, rounded 

 and folding under those of the preceding segment ; there is a shal- 

 low groove near the anterior margin, obsolete in the median region 

 but forming curves on the epimeral region ; there is a deep sinuate 

 transverse groove in the median region and a similar one in mid- 

 way between this and the posterior margin, neither of which ex- 

 tends to the lateral region. The telson has the distal margin broad- 

 ly, rather bluntly rounded, bilobed by the median longitudinal 

 sulcus ; the lateral incisions are oblique. The proximal portion of 

 the telson is triangulate with a proximal, interrupted, transverse 

 ridge, followed by a similar but entire ridge, and just below the 

 apex a pair of suboval squamae, followed by the similar contoured 

 apex. The telsonic margins are ciliated. 



The eye is large, ovoidal ; the cornea black, bulbous ; a sparse 

 fringe of setae along the dorsal line of union between the stalk 

 and cornea. 



The antennae have the first peduncular article armed with a 

 spinule at each distal angle; the second article is smaller with 

 similar distal spines, weaker; the third article is about half as 

 long as the second, devoid of distal spines ; the flagellum is very 

 fine. 



The antennulae have the peduncular articles curiously modi- 

 fied to protect the orbit; the basal article is large and can only 

 be seen in a ventral view with its outer distal angle produced in 

 a long spine curved upward, its outer lateral margin denticulate, 

 each denticulation carrying a long solitary hair, directed out- 

 ward and laterally, protecting the eye. The tip of this spine is 

 very acute, produced almost as far as the long submedian rostral 

 spine ; the second article is small, somewhat encupped on the outer 

 side by the first article and has its inner distal angle produced to 

 an acute tooth and the outer distal angle a long acute tooth that 

 extends almost as far as the third article; the third and fourth 

 articles are cylindrical, subequal; the flagellum is rudimentary 

 with a hairy brush of setae. 



The chelipeds are equal, each one being about twice as long as 

 the lateral border of carapace, slender ; the merus is dilated dis- 

 tally, armed with spines on both lateral and upper surfaces, these 

 spines along the upper distal border being much longer and 

 sharper than elsewhere ; low, scale-like squamae are interspersed 

 among the spines ; the carpus is two-thirds as long as the merus, 



