33 



Antennal peduncle reaching in the male to the proximal third, in the female to the 

 middle of the 2"^ joint of antennular peduncle; flagellum incomplete in all the specimens, but 

 certainly more than twice as long- as the body. 



The mandibular palpi show a somewhat different form, the i^' or proximal joint appearing 

 less broad in proportion to its length than in Halip. aeqiialis. External maxillipeds extending 

 with almost the whole dactylus beyond the tip of the antennal scales. 



The first pair of pereiopods reach to the end of i*' antennular article; there is a spine 

 at the far end of the ischium, but apparently no one at the base, following legs unarmed. The 

 legs of the 2"'^ pair reach to the end of the antennular peduncle; the carpus, one-fourth longer 

 than the merus, and. like that of the y^ pair, not at all dilated proximally, appears here as 

 thick as at the distal extremity. The legs of the 3"' pair extend about with the chela beyond 

 the apex of the antennal scale; carpus one and a half as long as the merus. 



The filiform legs of the 4''^ pair that project nearly with the whole carpus beyond the 

 antennal scales, measure three-fourths the length of the body, being 58 mm. long in the adult 

 male measuring 81 mm. and 73,5 mm. long in the adult female measuring 91 mm. The carpus, 

 in the adult female one-fourth longer than the merus, in the male a little less, appears in the 

 latter 4Yj-times, in the female almost 6-times as long as the propodus, that is twice as lonor 

 as the dactylus. The fifth pair of pereiopods are much longer than the 4'*! ; unfortunately the 

 5"^ legs are not complete in the few adult specimens that were collected, but they are certainly 

 almost as long as the whole body. In adult specimens, both males and females, the meri reach, 

 like those of the 4'*^ pair, to the tip of the rostrum ; the carpus is a little longer than the 

 merus, the propodus a little more than half as long as the carpus, but the short dactyli measure 

 one-fifth or one-sixth of the propodus. In the adult male long 81 mm., the merus measures 

 23 mm., the carpus 25 mm., in the adult female, long 91 mm., the merus measures 27,5 mm., 

 the carpus 31 mm., the two last joints are missing in both specimens; in a younger male, 

 long 60 mm., the 5'*^ legs measure 57 mm., the merus 18.25 mm., the carpus 20 mm., the 

 propodus 11,75 mm-, the dactylus 2 mm.; in a female, long 69 mm., the ^^ legs proved to 

 be J T) mm. long, the merus 22 mm., the carpus 26,5 mm., the propodus 15,5 mm., the dactylus 

 2,75 mm.; in another young female, long 58 mm., the 5''^ pair of legs are 61 mm. long, the 

 merus 19,5 mm., the carpus 21,5 mm., the propodus 12,75 "''""'• ^'''d the dactylus 2,25 mm. 



The petasma, certainly different from that of Halip. neptufius Sp. Bate, apparently also 

 differs from the petasma of Halip. aeqnalis. According to Alcock (Catal. Indian tieep-Sea Crustacea, 

 Decapoda Macrura and Anomala, Calcutta, 1901, p. 24), the two lobes of the petasma oi Halip. 

 aequalis terminate each "in two rounded lobules of slightly unequal size the inner of which is 

 nicked at tip and as the outer lobule is notched at base there is an appearance of a third lobule 

 further back". In Halip. propitiqims each lobe of the petasma encJs in two lobules; the anterior 

 lobule is much larger than the posterior, its obtuse tip show^s a small incision and is, like the sinuous 

 posterior margin of the lobule, beset with small spiniform setae; the posterior lobule is triangular, 

 with a subacute tip and the posterior border bears similar small spinules along its upper half, 

 but they are much smaller than those of the larger lobule. There is a strong, acute, compressed 

 tooth on the sternum of the i^' abdominal somite, a smaller tooth on that of the 2°''. 



35 



