Second antennular article a little loncrer than wide, its length beingf about two-thirds 

 that of the visible part of basal article, the third a little shorter than the second. Stylocerite 

 spiniform, acuminate, reaching to the distal third of median article. 



Carpocerite of a stouter shape than that of Syii. streptodactylus, 3,35-times longer than 

 wide (that of Syn. streptodadybis 4,1 -times), extending beyond the antennular peduncle by half 

 the distal article; lateral spine of the basicerite a little shorter than the stylocerite, reaching 

 to the 2"^ third part of median antennular article; upper spine directed outward, reaching about 

 to the middle of basal article. Terminal spine of scaphocerite slightly curved inward, just reaching 

 beyond the carpocerite and projecting by one-third of its length beyond the blade, which is 

 rather broad and extends to just beyond the middle of third antennular article. 



Merus of large cheliped 2,i8-times as long as wide, the slightly arcuate, upper margin 

 ending in an acute spiniform tooth. The relative measurements of the large chela, taken along 

 the infero-external side, are the following: fingers i, total length 4, height 1,5. The anterior 

 margin of the palm carries, on the supero-internal side, an acute, spiniform tooth. Extremities 

 of the fingers blue, with yellow tips. Merus of small cheliped 2,4-times as long as wide, upper 

 margin with a spiniform tooth at the apex. Relative dimensions of the small chela : fingers i ; 

 total length 3,1; height 1,1 and this chela is 2,82-times as long as high. 



Merus of second legs 6-times as long as wide; first article of the carpus 4,64-times as 

 long as thick, nearly as long as the chela, the fingers of which are slightly longer than the 

 palm, but distinctly shorter than the sum of the four following articles, the proportion between 

 the length of the first article and the sum of the following being 1,26; the 2"'^, 3'^'^ and 4''^ 

 articles are of equal length. 



Relative dimensions of third legs: merus 2,61; carpus i; propodus 2,72. The distal 

 half of the merus, which is just 4-times as long as wide, is armed with 4 movable spinules 

 of unequal length, the largest of which is 0,16 mm. long. The propodus, which is only 1,04- 

 times as long as the merus, is rather slender, 7,3-times as long as wide and bears 9 rather 

 short spinules, that are 0,066—0,146 mm. long, the three distal spinules being the longest 

 of all. When measured from the proximal end of the anterior margin to the tip of the ventral 

 hook, the dactylus, which is just 2,5-times as long as wide, appears to measure one-fourth the 

 length of the propodus. The ventral hook, which is twice as long as broad at its base, measures 

 one-fourth the distance between its tip and the proximal extremity of the anterior margin while 

 it makes an obtuse angle with the posterior margin of the dactylus; this hook is subacute, 

 its posterior margin is straight, the anterior slightly curved and, when examined under the 

 microscope, the finely striated anterior wall appears twice as thick as the posterior. The 

 tapering, pointed, dorsal hook, which is 3, 4-times as long as broad at its base, is a little 

 longer than the other and the ventral hook is one and a half as broad at its base as the 

 dorsal ; both hooks slightly diverge, but the angle they make with one another, is rounded. 



In Syn. streptodactylus the dactyli of the third legs show a more slender form, being 

 3-times as long as wide at their base; the ventral hook is also more elongate, 2,5-times 

 as long as wide at its base and the anterior wall of this hook is usually as thick as the 

 posterior, rarely a little thicker, but never twice as thick; the dorsal hook, finally, that makes 



