353 



which are laterally, more prominent than in that species. The corneae are much farther distant 

 from one another, the interspace being as broad as their diameter; the interorbital carina, at 

 first very narrow and little prominent, becomes somewhat broader backward and can be foliowed, 

 at least in the female, almost to the middle of the carapace. Before the orbits the upper surface 

 of the front is flattened; shallow, though rather broad furrows separate the rostral carina from 

 the orbital hoods. 



In the male the pleura of the i st — 4* abdominal somites terminate in a spiniform 

 process with a rather obtuse tip, that of the i st somite being curved forward; the 5 th and 

 the 6 lh somites are also acute, while the pleura of the 2 nd are not very broad. The outer 

 angles of the posterior margin of the 6 th somite terminate in a strong spiniform tooth; 

 between these two the margin is produced into an acute median tooth, that is only 

 half as long as the teeth at the outer angles. In the female the pleura of the i st somite 

 terminate in a short obtuse process at their posterior angle and those of the following in an 

 obtuse point; posterior margin of the 6 th somite like in the male. Telson of the male 3,5-times 

 (in the female 3,7-times) as long as the posterior margin is broad, its greatest width, at one-third 

 of its length from the base, almost twice as broad as the posterior margin, the proportion beino- 

 as 11:65 spinules of the upper surface 0,16 mm. long, situated close to the lateral margins, 

 the anterior pair just in front of the middle, the posterior pair not far from the anterior and 

 twice as far from the posterior margin as from the anterior pair. Posterior margin rounded, 

 little prominent; of the two spines at the outer angles the inner ones are half as long as the 

 posterior margin is broad. 



Second article of antennular peduncle twice as long as thick, one and a half as long 

 as the visible part of the i st ; this visible part hardly longer than the 3 rd article. Stylocerite 

 acute, reaching to the distal third of the visible part of i st article. Basicerite unarmed. Carpocerite 

 extending beyond the tip of the antennular peduncle almost with the whole length of 3 rd article. 

 The scaphocerite, the outer margin of which is distinctly concave and the terminal spine of 

 which extends backward to the middle, slightly projects beyond the tip of the antennular 

 peduncle; the narrow blade, finally, devoid of hairs, reaches to the end of the 2 nd article. 

 Terminal joint of external maxillipeds 4-times as long as broad. 



The larger chela of the male resembles that of A. ovaliceps. This chela, 5,5 mm. long, 

 one and a half as long as the carapace, is almost 2,25-times as long as high, the palm being 

 2,4 mm. high; the palm is ovoid, almost as thick as high, everywhere rounded, presenting 

 only a slight depression at the far end of the upper border. Immobile finger with the tip 

 acute, slightly grooved on the outer side, convex on the inner; the dactylus, 2 mm. lono-, 

 somewhat more than one-third the total length, is obtuse, much longer than the immobile 

 finger and regularly curved above. Chela smooth and glabrous. Merus stout, one and a half 

 as long as broad in the middle; upper margin unarmed, infero-internal margin with a subacute 

 tooth at the extremity. Larger chela of the female one and a third times as long as the carapace, 

 2,6-times as long as high, outer face of the merus twice as long as broad. For the rest the 

 chela and the merus agree with those of the male. The smaller chela of the male much 

 resembles that of A. styliceps, but the fingers are a little shorter in regard to the palm, 



