21 



as long- as broad, the proportion being as 28 : 15; anterior prominence one-third the total length 

 of the joint. 



The external maxilHpeds differ from those of Aiiia/. elegans by the existence of a podo- 

 branch and bv the characteristic form of their carpus ; the epipod is narrow, one and a half 

 as long as the basipodite is broad. Measured along the outer margin the ischium appears to 

 be 3 mm. long; being i mm. broad in the middle, it proves to be just 3-times as long as broad. 

 Alerus 1,8 mm. long and i mm. broad. The carpus is claviform, (hence the name of the 

 species), being considerably thickened distal ly; it is 1,56 mm. long, little shorter than 

 the merus and the greatest thickness, 0,5 mm., is one-third its length; propodus as long as 

 the carpus, but cylindrical, 5-times as long as thick ; the dactylus, finally, is 0,85 mm. long, 

 without the terminal spine, resembles that of Aiiial. elegans^ and is little more than half as 

 long as the propodus. 



In the i^' pair of legs the carpus, which is a little shorter than the chela, measures 

 three-fifths the length of the merus; fingers shorter than the palm. In the adult female the 

 merus is almost 3-times, the carpus about 2, 5-times and the chela 3,6-times as long as broad 

 in the middle. In the adult female the chela of the 2"*^ legs is a little longer than the carpus, 

 but in younger specimens their length is the same ; fingers tvvo-thirds the length of the palm. 

 In the adult female the merus is almost 4-times, the carpus 3,4-times and the chela 3,2-times 

 as long as broad in the middle. Merus of y^^ legs in the same specimen a little shorter than 

 the carpus, also in the male long 22 mm., but in the female from Stat. 230 that has the 

 same size the carpus is as long as the merus ; the carpus gradually thickens towards the distal 

 extremity ; chela a little more than half as long as the carpus, palm slightly longer than the 

 fingers. In the adult female the merus is S-times, in the male, long 22 mm., 9-times as long as 

 broad in the middle; in the adult female the carpus appears to be 1 5-times as long as thick 

 in the middle and it is almost twice as thick at the distal extremity as in the middle ; chela 

 3,8-times as long as broad. 



Measurements in millimeters of the three first legs in three specimens : 



First legs 



Second legs 



Third legs 



Length of merus 



VVidth of merus 



Length of carpus 



Width of carpus 



Length of chela 



Length of palm 



Width of chela 



Proportion between length and width 

 of chela 



2,45 

 0,86 



i>S 

 0,62 



1,9 

 i,oS 

 0,52 



3,6 



0,22 



2,2 

 0,16 



1,2 

 0,64 



0,1 



a adult female from Stat. 128; <$ the female long 23 mm. and c the male long 22 mm. 

 from Stat. 2 :;o. 



