43° 



For the measurements of the telson I refer to Table A : it resembles that of the variety dolicho- 

 dactylus. Posterior margin prominent, semicircular, the outer angles almost indistinct, spinules 

 near the latter very short; spinules of the upper surface rather small, measuring in the male 

 one-tenth, in the female one-twelfth the length of the telson. 



Second antennular article 2,5-times as long as thick, in the adult male from Stat. 311 

 almost one and a half as long as the visible part of first antennular article, in the adult female 

 from Stat. 19 one-third longer than it; third article in the male one-sixth, in the female one- 

 third shorter than the visible part of basal article. In the adult male, long 34 mm., of the 

 variety from the Sagami bay the second antennular article is almost twice as long, viz. 

 1,9-times, as the visible part of the basal article, according to Ortmann's description. Stylocerite 

 very broad with pointed extremity, a little shorter than first article. Spinule of the basicerite very 

 small. Carpocerite extending with half the length of third article beyond the tip of the antennular 

 peduncle; scaphocerite very broad, resembling that of A. Euphrosyne de Man, as long as the 

 antennular peduncle, its outer margin nearly straight, terminal spine not or hardly extending 

 beyond the rounded tip of the blade and reaching backward to the end of second antennular 

 article or even not so far. 



The measurements of the i st — 3 rd legs are indicated in the Tables B, C and D. The 

 upper border of the merus of the larger cheliped terminates in a subacute tooth or lobe, infero- 

 internal margin with a pointed spine at the apex. Large chela of the male. one and a half as 

 long as the carapace, rostrum included, a little more than 3-times as long as high (broad), 

 fingers a little more than half as long as the palm; both margins distinctly notched, groove 

 on the outer face quadrangular, reaching backward to the middle of the palm, groove on the 

 inner triangular; chela smooth and glabrous. Large chela of the female from Stat. 19 a little 

 more slender than that of the male. 



Unfortunately the small cheliped is missing in all the male specimens, but the ova-bearing 

 female from Stat. 1 9 is provided with it. The merus is one and a half times as slender as that of 

 the larger leg, the infero-internal margin is unarmed, the upper margin truncate at its extremity. 

 Chela as long as the carapace, fingers 3-times as long as the palm, slender, their inner margins 

 shutting together and clothed with long hairs, the inner margins are unarmed. 



The second legs agree with those of the variety dolickodactylus, as is proved by the 

 Table C. In the adult male from Stat. 311 the carpal segments are respectively long: 1,57 mm., 

 1,65 mm., 0,45 mm., 0,4 mm. and 0,56 mm.; chela 1,54 mm. long (palm 0,5 mm., fingers 1,04 mm.). 

 In the male long 24 mm. from Stat. 19 the carpal segments measure 1,82 mm., 1,47111111., 

 0,4 mm., 0,36 mm. and 0,56 mm.; the chela is 1,58 mm. long (palm 0,56 mm., fingers 1,02 mm.). 

 In the ova-bearing female from Stat. 19 the segments of the carpus are respectively long: 

 1,8 mm., 1,61 mm., 0,46 mm., 0,42 mm. and 0,6 mm. ; the chela is 1,68 mm. long, the palm 

 0,56 mm., the fingers 1,12 mm. 



In the adult typical male of the variety dolickodactylus from Japan the carpal segments 

 measure: 2,66 mm., 2,24111111., 0,7111111., 0,63 mm. and 0,77111111.; the chela is 1,86 mm. long 

 (palm 0,67 mm., fingers 1,19111111.). 



These numbers show that the 2 nd segment of the rather slender carpus appears sometimes. 



298 



