100 J. R. KiNAHAN on the Britannic Species of 



The general form of body of this species is elongate, the breadth being to 

 the length as 3 : 8, the carapace being longer than broad, narrowed in front. 

 The abdomen is nearly one-third narrower than the broadest part of the cara- 

 pace, and much narrower anteriorly than posteriorly. The carapace is rounded 

 above ; it bears a row of small teeth behind the frontal region. The trans- 

 verse lines are hirsute, and terminate laterally in teeth. 



The rostrum is nearly plane above, flattened, terminating as a moderately 

 broad tooth, and surpassing the eyes by two-thirds of their length. Its margins 

 are produced into four small flattened teeth on each side, which are equidistant 

 from each other, and the last situate at the inner margin of the ocular notch. 

 Tlie upper surface of the rostrum and the frontal region are squamate ; the 

 scales rounded, ciliated, and thick-set. 



Internal antennas longer than the eyes when outstretched, the basis strongly 

 toothed. 



External antennte are nearly as long as the body, their third articulation 

 very sparingly toothed. 



First pair of chelipeds elongate, as long as cephalo-thorax and abdomen, a 

 row of small cylindrical teeth along each margin of the propodos, carpus, and 

 meros, wliich are toothed on inner margin and superiorly, the upper surface 

 covered with squaraiform tubercles, which are rounded in outline, close-set, 

 and densely bordered with long hairs, which give the limb a slightly villose 

 appearance. In young specimens, these scales are present as teeth. The 

 under surface is polished, thickly set with squamiform tubercles, which are ser- 

 rated, rounded, and ciliated. The dactylos and opposing process of the propo- 

 dos are lioUowed, coarsely and evenly denticulate. The carpus is furnished 

 with a strong tooth at its superior margin, and a second smaller about half 

 way down. The meros bears two teeth on its superior margin, and a smaller 

 one at the inner edge. Its outer border terminates in a cylindrical tooth. The 

 second pair of chelipeds is toothed on its inner border. The fifth pair of cheli- 

 peds are slender, as long as tlie carapace without the rostrum, and terminating 

 in a blunt hand. 



The external niaxillipeds barely attain extremity of rostrum when extended; 

 the ischium is much longer than the meros. 



The eye-scale is rounded, broad, and ciliated. 



