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measured along their axis, are a little shorter than the palm. The left chela is slightly larger 

 than the right, the palm of the left is precisely as long and as high as that of the small chela 

 of the male, but, as was already remarked, the palm is a little longer than the fingers. On the 

 lower (outer) surface of the chelae the semi-elliptical area is quite distinct; it reaches beyond 

 the middle of the palm, the area on the larger chela being more obtuse at the far end than 

 the other. All the chelae are marked, like in Ar. indicus, with a constriction on the outer 

 (upper) margin of the palm, near the articulation of the carpus. 



Second legs stouter than those of Ar. indicus. Merus, in the male, 3,5-times longer 

 than wide; the first segment of the carpus, which is hardly longer than the merus and 5-times 

 as long as broad near the articulation of the chela, is 0,48 mm. long and 3-times as long as 

 thick distally ; second segment 0,18 mm. long, third 0,14 mm., fourth 0,25 mm. Chela 0,67 mm. 

 long, fingers a little shorter than the palm. 



Relative dimensions of the third legs, in the male: merus 2,1; carpus 1 ; propodus 1,7; 

 merus 1,2 5-times as long as the propodus, 4, 3-times as long as wide and armed with a 

 strong acute tooth, that appears a little larger than in Ar. indicus (Coutière, 1. c. Fig. d). 

 Propodus 5, 5-times as long as wide; whereas in Ar. indicus the propodus bears only 2 or 3 

 spinules, one observes in Ar. Iphianassa 12 spinules along the whole length of the 

 margin; these spinules are small, 0,07 — 0,085 mm - ^ on gi there being still a much larger 

 spinule, long 0,14 mm., at the distal extremity. In the female the propodus carries 8 spinules 

 besides those at the distal extremity. Measured until to the end of the dorsal hook, the dactylus 

 proves to measure one-third of the propodus and to be 4-times as long as broad near the 

 articulation ; ventral hook half as long as the other. 



Relative dimensions of fourth legs: merus 2; carpus i; propodus 1,95. Merus 4-times 

 as long as wide, the tooth at the distal extremity smaller than in the third pair ; propodus 

 5,8-times as long as wide, posterior margin with 6 very small spinules, 0,028 — 0,056 mm. long, 

 besides 2 or 3 larger ones at the distal extremity. Dactylus as in the third pair. 



Ova of moderate size. 



The two specimens are of equal size, 9,5 mm. long. 



The young male from Stat. 142, the telson of which is damaged, agrees with the 

 described specimens from Stat. 125, but it is a little smaller, hardly 8 mm. long. The spine at 

 the outer angles of the orbits is, however, a little longer than the eyes and the third anten- 

 nular article is but a little more than one and a half as long as the second and a little shorter 

 than the second with the visible part of the first taken together. The palm of the large chela — 

 the small cheliped is missing — appears a little longer with regard to its height than in the 

 adult male from Stat. 125, the proportion between length and height being as 7:4. The 

 fingers are toothed as in the adult male, but the tooth of the dactylus is smaller, decidedly 

 smaller than the rounded, proximal tooth of the immobile finger and the large tooth of the 

 latter is truncate, though not slightly excavate. 



The following legs are a little more slender than in the adult, as has been observed 

 also in other species. Merus of second legs 4, 3-times as long as wide. Carpus 6, 3-times as long 

 as broad or thick at the distal extremity of the fourth segment and one-fourth longer than the 



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