268 



equal length, the inner just half as long as the distance between the spiniform angles, the 

 outer but a little shorter and both pairs somewhat project beyond the postero-lateral spines. 

 The spinules of the upper surface are large, those of the anterior pair are just as long as the 

 internal spinules of the posterior margin, those of the posterior are a little longer; the anterior 

 are situated far before the middle, the proportion between the length of the telson and their 

 distance from the posterior margin being 1,6 and the proportion between the distances of either 

 pair from the posterior margin is 1,93. In the other younger specimen the telson is still more 

 elongate, the proportion between its length and the distance of the postero-lateral spines being 

 2,8, while the proportion between the latter distance and the width at the base is 2,3; the 

 proportion between the length of the telson and the distance of the anterior pair from the 

 posterior margin is 1,7, while the proportion between the distances of either pair from the end 

 of the telson is 1,65. 



Merus of large cheliped, in the larger specimen, 1,88-times longer than wide, with a 

 spiniform tooth at the apex of the upper margin. The relative dimensions of the large chela 

 are: fingers i; total length 3,74; height 1,52; proportion between the total length and the 

 height being 2,45. At the supero-internal side the anterior margin of the palm ends in a conical, 

 though rather obtuse tubercle. 



Merus of small cheliped 3-times longer than wide, upper margin truncate and unarmed 

 at apex. The relative dimensions of the small chela are: fingers i; total length 2,54; height 

 0,81 ; proportion between the total length and the height 3,1. Larger chela 2,6-times as long- 

 as the other. 



In the second pair the merus is 4,5-times longer than wide. First segment, like the 

 following, also of a stout shape, 3-times longer than thick and somewhat shorter than the sum 

 of the four following, that, taken together, are 1, 3-times as long as the first segment; the chela, 

 the fingers of which are one and a half as long as the palm, appears hardly shorter than the 

 sum of the four last segments. The second segment is slightly shorter than the third and than 

 the fourth that are equal and the fifth segment is one-third longer than wide. 



Following legs also of a rather stout shape. The relative dimensions of the third 

 legs, which, except the dactylus, much resemble those of Syn. pachymeris Cout., are: merus 

 2,8; carpus i; propodus 2. The merus, which is. 3,43-times longer than wide, bears 3 

 small and feeble, movable spinules, long 0,09 — 0,1 mm., on the distal third of the 

 posterior margin, a quite remarkable character, because in the species of the Paitlsoni group 

 the merus appears as a rule unarmed. The propodus, 4,65-times longer than wide, narrows 

 distally as in Syn. padiymeris Cout. and is armed with 8 spinules, that are 0,08 — 0,11 mm. 

 long. Measured from the extremity of the ventral hook to the proximal end of the anterior 

 border, the dactylus appears to measure one-sixth the length of the propodus and to 

 be just twice as long as broad at the base. The dactylus much resembles that of Syn. 

 acanthitelsonis. The ventral hook, that measures one-sixth the total length of the dactylus, is 

 one and a half as long as broad at its base, its posterior margin rejoins by a concave curve the 

 posterior margin of the dactylus, whereas the S-like shaped anterior runs nearly perpendicularly 

 to the latter-, the tapering and curved, dorsal hook is twice as long as the other and one and 



136 



