ARY 



FEOM THE I^'LAXD SEA OF JAPAN. 429 



a little flattened, and gradually fades away about on the middle of the cephalo thorax. yc^^^A? ^ 

 The surface of the latter is punctate, the puncta being larger posteriorly. ^ n^^ *'«\'?' N 



The telson, 7o mm. long and i mm. broad at its l)ase, resembles that of the ' Challenger ' '^'^'^^ ^\^\ 



rapax, but the spinules of the posterior pair stand closer together. The lateral S'\i immerets 

 extend a little beyond it. The second joint of the antenniilar peduncle is in one specimen 

 twice, in the other almost twice, as long as the first and almost three times as long as the 

 third; the flattened stylocerite ends in a sharp spinule which reaches to the extremity of 

 the first joint of the peduncle. The antennal scale, slightly longer than the antennular 

 peduncle, has the same form as in the adult male from Strassburg ; it has a mucii 

 stouter shape than that of Spence Bate's rff/jo.r-specimen, the scale being 7 mm. long and 

 2"75 mm. broad proximally ; the terminal spine barely reaches beyond the tip of the 

 scale and its outer margin is slightly concave. Tiie antennal peduncles, reaching only 

 to the middle of the third joint of the inner antennae, are shorter than the scales, whereas 

 in the adult male from the Strassburg Museum they reach a little beyond them. The 

 external maxillipeds reach to the end of the antennal scales. 



In one specimen the larger cheliped is placed on the right side, in the other on the 

 left. The larger cheliped resembles that of the ' Challenger ' specimen of A. rapax {I. c. 

 pi. 99. fig. 1^^). The upper border of the merus terminates in a sharp tooth, the rather 

 sharp infero-internal edge is beset with very small teeth and ends in a much stronger 

 pointed tooth. The chela is in one specimen 20 mm. long and 5"5 mm. broad, the fingers 

 being 7"^ mm. long. The larger chela of the other female is 17 mm. long, 5'4mm. broad, 

 the fingers 7'25 mm. long. The outer and the inner surfaces of the larger chela are finely 

 granulated, except the distal half of the fingers which is smooth ; the outer surface of the 

 fixed finger is slightly concave, that of the palm presents no trace of carinae ; the two 

 caringe on the vipper border are distinct, the inner, fringed with long hairs and continued 

 to the carpal articulation, more than the oviter, which fades away nearly on the middle 

 of the palm. The lower edge of the chela is also fringed with hairs internally, from the 

 carpal articulation to the tip of the immobile finger, and the hairs along the upper 

 border are continued to the tij) of the dactylus. 



The smaller cheliped (PI. 33. figs. 51, 52) also much resembles that of the ' Challenger ' 

 rapax-s^ecivaer\, but the immobile finger is distinctly broader at its base than the dactylus, 

 whereas in fig. 1 of pi. 99 the dactylus appears broader than the immobile finger. The 

 merus, as slender as on that figure, is armed Avith the same teeth as that of the larger 

 cheliped. The chela is strongly compressed. In the larger female it is 17'25 mm. long, 

 the palm G-25 mm. long and 3-5 mm. broad ; in the other specimen these numhers ai-e 

 l-iS mm., 55 mm., and 37 mm. The fingers gape a little and are compressed, especially 

 the immobile, which at its flattened base is distinctly hroader than the dactylus, whereas 

 both taper towards the pointed, crossing tips ; their inner edges are hairy. The upper 

 and lower borders of the chela of the dactylus are fringed with long hairs on their inner 

 side. 



The four following legs closely resemble those of the older specimen, 65 mm. long, of 

 Ortmann's A. rapax from the Bay of Tokyo, mentioned above. The second joint of the 

 carpus of the second legs is 1 mm. long, a little longer than the first (3 5 mm.j. Tho 



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