205 



subacute, the following also, the 6 th rather acute. The lateral margins of the telson converge 

 rather strongly, so that it appears 4,5-times as long (2,7 mm.) as its posterior margin is broad 

 (0,6 mm.) and the latter is not at all prominent in the middle; the greatest width anteriorly 

 is 3,4-times as broad as the posterior margin. One observes a shallow and narrovv, longitudinal 

 furrow in the mid-line, but this furrow does not extend to the base. The anterior pair of 

 spinules, which are rather small, 0,22 mm. long, and inserted close to the lateral margins, are 

 situated rather far backward, their distance from the posterior margin being in proportion 

 to the length of the telson as 1 : 2,7; the posterior pair is a little farther remote from the posterior 

 margin than from the anterior pair. In the closely allied Syn. amboinae (Zehntner) the spinules 

 of the upper surface are larger and situated more forward. Inner uropod just one and a half 

 as long as broad, distinctly b r o a d e r than in Syn. amboinae. When the figure 3 of my cited 

 paper is indeed accurate, the visible part of first antennular article should be, in Syn. Stimpsonii, 

 little longer than the second; after the description the first article should be twice as long as 

 the second, but perhaps that part of the first which is covered by the front, has been included. 

 In the male from Stat. 213 the visible part of first article appears twice as long as the 

 second, and the second one-third longer than the third ; the stylocerite just projects beyond 

 the first article. As in Syn. Stimpsonii the carpocerite is as long as the antennular peduncle, 

 but, different from this species, the lower spine of the basicerite extends a little farther 

 forward than the orbital spines; upper spine of the basicerite very small, one-third of the 

 lower. As in Syn. Stimpsonii the terminal spine of the scaphocerite attains the apices of the 

 peduncles, but, otherwise as in this species, it is not or hardly curved inward and it projects 

 by one-third of its length beyond the rounded tip of the blacle ; the blade, however, hardly 

 reaches beyond the apex of second antennular article. 



The external maxillipeds reach as far forward as the carpocerites. 



The upper margin of the merus of the large cheliped which is 3-times as long as broad, 

 ends in a small, acute tooth, outer margin with the apex acute, that of the infero-internal 

 margin obtuse. Anterior margin of the upper face of the carpus with a small, acute tooth, 

 posterior margin also terminating in an acute tooth. Chela almost one and a half as long 

 (12,5 mm.) as the carapace, rostrum included, (8,75111111.), 4-times as long as high; the chela 

 presents its greatest height at the proximal third, about as in Syn. Stimpsonii. Fingers 4,5 mm. 

 long, a little more than half as long as the palm; dactylus less strongly curved and 

 Ie ss high than that of Syn. Stimpsonii, its cutting-edge presenting a small, acute tooth 

 not far from the tip, whereas in Syn. Sti/npsonii the edge appears entire. Palm with a small, 

 acute tooth at the far end of the inner face, immobile finger resembling that of Syn. Stimpsonii. 

 The small cheliped is missing - . 



First carpal segment of 2 nd legs one-sixth longer than the sum of the four following, 

 second segment a little longer than the third and the fourth that are equal, fifth one and a 

 half as long as the second ; the chela, the fingers of which are slightly longer than the palm, 

 is 2,5-times as long as the fifth segment. 



In the following- legs the ischium is unarmed. Merus of third legs 6,2-times as long- as 

 broad, armed with a moderately strong, acute tooth at the far end of the posterior margin ; 



73 



SIROGA-EXPEDITIE XXXIX o 1 . 27 



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