i63 



margin, the scaphocerite has a different form and the third maxilliped is not furnished with an 

 exopodite, but merely with a small papilla on the outer side of the basipodite. 



General distribu tion: Arabian Sea (Alcock) ; East London, Cape Colony (Stebbing). 



4. Heterocarpus gibbosus Bate. PI. XIV, Fig. 39 — 39^. 



Heterocarpus gibbosus C. Spence Bate, Report Challengcr Macrura, 1S88, p. 634, PI. CXII, fig. 2. 

 Heterocarpus gibbosus J. Wood-Mason, in: Ann. Mag. Xat. Hist. 6. Ser., Vol. 9, May 1892, 



p. 368, 369, fig. 6. 

 Heterocarpus gibbosus A. Alcock, Descript. Catal. Indian Deep-Sea Crustacea, Calcutta 1901, 



P- 103. 



Stat. 12. March 14. 7°i5'S., U5°is'.6E. Bali Sea. 289 m. Bottom mud and broken shells. 



1 male and 4 females, one of which bears ova, while another lodges an Epicarid. 

 Stat. 38. April 1. 7°35'.4S., ii7°28'.6E. Bali Sea. 521 m. Bottom coral. 5 males, most of 



which are young and 4 females, one of which is provided with eggs; this egg- 



bearing female and still a younger one are attacked by an Epicarid. 

 Stat. 74. June 8. 5° 3'. 5 S., ii9°o'E. Southern entrance of the Strait of Makassar. 450 in. 



Bottom Globigerina ooze (obviously a thin layer). 3 full-grown males. 

 Stat. 256. Dec. 11. 5°26'.6S., i32°32'.5E. Near the Kei-islands. 397 m. Bottom greyish green 



mud. 10 males and 1 1 females, nearly all adult, while 2 females are ova-bearing. 

 Stat. 262. Dec. 18. 5°53'.8S., I32°48'.8 E. Off the Kei-islands. 560 m. Bottom solid bluish 



grey mud, upper layer more liquid and brown mud. 2 young specimens. 



The numerous specimens fully agree with the quoted descriptions and figures, but it 

 must be observed that the dactyli of the three posterior legs, described by Col. Alcock as 

 "very short", are indeed rather long (J. Wood-Mason, 1. c. Fig. 6), measuring one-third of 

 the propodi (Fig. 39^ 39^). Form, length and direction of the rostrum vary rather much, like 

 also the number of teeth with which the margins are armed (confer the figures). The carapacial 

 carina, of which the height also varies considerably, is usually armed with 6 teeth, of which 

 the 6 th stands before the orbital margin, like in Wood-Mason's figure, rarely with 7 or 5 ; in 

 case of 7 teeth, five or six, rarely four, stand on the carapace behind the posterior margin, in 

 case of 5 teeth, four. The upper margin of the rostrum proper bears usually 2 or 3 teeth, 

 rarely 1 or 4, and these teeth are much smaller than those of the carapacial carina. The lower 

 margin has usually 12 — 14 teeth, rarely 11 or 15, in only one adult specimen 10 teeth were 

 observed, in another 9, in a third S and in an adult male from Stat. 74 the lower margin 

 bears but 6 teeth; the ventral teeth gradually decrease in size anteriorly and the 2 or 3 foremost 

 ones are rudimentary. The rostrum is more o r less strongly upcurved, so that the apex is some- 

 times, especially in younger individuals, situated above the level of the teeth of the carapace, 

 sometimes just as high, or below it. The outer aspect of the specimens appears therefore 

 sometimes so difterent, that one is inclined to consider them as. different species. 



In an adult male from Stat. 74, of which the carapace measures 33 mm. from the orbital 

 to the posterior margin and the rostrum 21,5 mm., the fifth abdominal somite, measured dorsally, 

 proves to be 9 mm. long, the sixth 12 mm., the telson 21 mm., the terminal spines excluded, 

 and the telson is still 1 mm. shorter than the uropods of the caudal fan ; in the largest ova- 

 bearing female from Stat. 256 carapace and rostrum are respectively 35 and 25 mm. long, the 



