302 



Second legs short, reaching only with the fingers beyond the 

 carpal articulation of the hand of the anterior pair, carpus slender, 

 hardly longer than the chehi, which is nearly 5-times as long as 

 broiid, fingers almost as long as palm. Third legs setaceous, re- 

 sembling Bate's figures 2 and 3 in the Report on the Challenger 

 Macrura, propodus as long as merus, carpus a little longer, dactylus 

 half as long as propodus. 



Carapace long 7,7 mm., measured in the middle line, abdomen 

 18 mm., entire length 25,7 mm. — 



Aegeon Sibogae n. sp. 



Stat. 15. 7° 2'. 6 S., 115° 23'. 6 E. Bali Sea, south of Kangeang. 

 100 m. Bottom fine coralsand. One female without eggs. 



This species belongs to that section of the genus, in which 

 the lateral carina of the carapace is interrupted by the well defined 

 hepatic groove, and is closely related to A. pennata (Bate). 



The huge spine at the anterior extremity of the lateral carina 

 runs straight forward, with the tip hut sUgldJij turned outwards, 

 much less than in A. pennata^ the distance bet ween the tips being 

 even a little smaller than the greatest width of the carapace. 

 Posterior moiety of lateral crest like in A, piennata (Bate), var. 

 affinis Alcock (Illustr. Zool. „Investigator", PI. LT, fig. 3), with 

 anteriorly a sharp tooth and behind it 5 smaller ones. Supra- 

 marginal carina distinctly serrate by 13 or 14 processes, that are 

 small, little prominent and that are all obtuse excepting the anterior 

 which is acute: both in the typical A. pennata and its variety 

 affinis the supra-marginal carina is smooth. 



Antepenultimate thoracic sternum of the adult female armed, 

 in the middle line, with a large, laterally strohgly compressed 

 tooth, the sharp tip of which is curved forward; penultimate with 

 a similar tooth, that is, however, smaller and less strongly com- 

 pressed ; last thoracic sternum smooth. In the adult female of the 

 typical A. pennata the three posterior thoracic sterna are smooth, 

 unarmed, while in the variety affinis Alcock the carination of 

 the antepenultimate is distinct, but that of the last two obsolescent. 



Abdomen sculptured exactly after the same pattern as in the 



