157 



Relative dimensions of 



Table. 



Merus 



Carpus 



Propodus 



Proportion between the length and the width of the merus. 

 Proportion between the length and the width of the propodus 



Ova numerous, small, 0,42 — 0,45 mm. long. 



The male is 8,5 mm. long, the largest of the three ova-bearing females 12 mm. 



of the third legs 



f5. AtJianas tenuipes de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1910, p. 316. 



Stat. 116. July 12. o°58'.5 N., I22°42'.5 E. West of entrance of Kwandang-bay. 72 m. Fine 

 sand with mud. 1 mutilated and probably young specimen. 



This species, that belongs to those in which the supra-corneal spines are w a n t i n g and 

 in which the dactyli of the three posterior legs are sim pi e, may easily be recognized by the 

 very slender form of the four posterior legs: unfortunately the legs of the i st pair are missing. 



Rostrum slender, acute, slightly directed downward, 6-times as long as wide in the 

 middle and just reaching beyond the apex of the iïrst antennular article ; its lateral borders 

 make distinct angles with the frontal margin. Looked at from above, the extra-corneal spines 

 almost reach the anterior end of the eyes; in a lateral view this spine appears one and a half 

 as long as wide at its base and slightly directed upward, though not extending beyond the 

 eyes. Infra-corneal tooth half as long as the extra-corneal spine, small, dentiform, not longer 

 than wide. Eyes black, distinctly facetted, almost entirely uncovered. 



Measured from the base of the rostrum, the first antennular article appears slightly 

 longer than the two following taken together; the second and the third that are subequal, are 

 hardly longer than thick. The undivided part of the outer flagellum consists of 4 or 5 articles; 

 the i st and the 4 th are of equal length and one and a half as long as thick, the 3 rd is a little 

 shorter and the 2 nd the shortest of all, nearly half as long as the i st . Stylocerite acuminate, 

 reaching to just beyond the middle of median article. 



Basicerite with a short spine at the infero-external angle. Carpocerite about as long as 

 the antennular peduncle, not longer; scaphocerite slightly longer than the latter, terminal spine 

 just surpassing the blade. 



Abdomen nearly one and a half as long as the carapace, rostrum included ; pleura of 

 6 th somite acute, articulate, movable. Telson characteristic, 5-times as long as the posterior 

 margin is wide; the latter, rather narrow, appears in the middle slightly notched or emarginate 

 and bears at either side two long spin ui es, the outer spinule as long as the posterior 

 margin is broad, the inner one and a half as long; in the narrow interspace between the 

 inner spinules two or three setae are implanted. Width at the base twice as broad as the 

 posterior margin. The spinules of the upper surface are half as long as the posterior margin 



25 



SIEOGA-EXPED1TIE XXXIX a' 



