218 Bulletin Vanderbilt Marine Museum, Vol. VII 



mesogastric spine and longitudinally in line with the preorbital 

 spines, there are a pair of sharp spines, one on either side on 

 the mesogastric region, followed posteriorly by a well-spaced 

 pair of larger spines, one on each side of the metagastric region. 

 Approximately in line with these, there are three smaller spines, 

 one at the anterior of the cardiobranchial carina, the second and 

 third spines spaced along the posterior of the cardiac margin 

 and slightly outside of this, on the branchial region, is yet 

 another spine, these last three together forming a triangle. There 

 is a large, out-jutting, strong spine on the center of the hepatic 

 region ; below this, on the lower margin, there are three unequal 

 spines in close series and in line with these anteriorly there is 

 another laminate, sometimes bifid spine at the buccal angle. Six 

 or seven spinules occur irregularly spaced in linear series above 

 the lateral margin on the branchial region, while dorsad on the 

 branchial region there are three large spines obliquely in line 

 with the first gastric spine; the first and second of these spines 

 are on the anterior mesobranchial and the third spine is on the 

 outer convex portion of the mesobranchial area, in line with the 

 maximum width of the carapace. The male belt is composed of 

 seven somites, the above mentioned first and second somites of 

 which are subdorsal, each armed with a median spine, while the 

 median area of all seven somites is tumid and set apart on either 

 side by a sulcus from the outer lateral portions. 



The cornea of the eye is small, black, subhemispherical, set 

 terminal on the short, thickish, calcareous stalk which dorsally 

 projects above the cornea; the visual range is chiefly lateroven- 

 trad. 



The large male has the chelipeds moderately unequal (possi- 

 bly due to regeneration of the left one ; in the smaller male the 

 chelipeds are about equal. The ischial joint of the larger speci- 

 men is short, strong, distally oblique, with a strong nodule at 

 the anterolateral angle ; the merus is 144 millimeters long, slender, 

 subcylindrical, thickening a little distally, with the entire surface 

 covered with coarse prickles, some few of which, near the proxi- 

 mal and distal margins, are coarser; the outer and inner distal 

 angles of the merus each form a conspicuous node ; the carpus is 

 short, 25 millimeters long, with the upper surface convex, accen- 

 tunated by three irregularly spinose carinae and a few scattered 

 prickles; the propodus and dactyl are 165 millimeters long, of 



