i3 6 



105 mm., the left leg measures 122 mm., being one-sixth longer than the body; the ischium 

 reaches to the far end of the antennal peduncle and this leg reaches by the chela, the carpus 

 and three-fourths of the merus bevond the antennal scale; the carpus, which is 58,5 mm. long, 

 measures half the length of the leg; the chela, the fingers of which are a little shorter than 

 the palm, is 2,86 mm. long, 1 / 4g the length of the leg. In this leg also the merus is multi- 

 articulate and even the distal half of the ischium. The right leg is 65 mm. long, about half 

 the length of its fellow, and it reaches by the chela and almost the whole carpus bevond the 

 antennal scale, while the merus extends by half its length bevond the antennal peduncle; the 

 chela (4,8 mm.), in which the fingers are a little shorter than the palm, measures about "-/ u 

 the length of this leg and is a little more than one and a half as long as the chela of the 

 other leg; in this leg the merus shows also numerous annulations, that are less obvious than 

 those of the carpus. 



In the full-grown female the legs of the 3" 1 pair reach by the dactylus and the propodus 

 beyond the antennal scale, the following legs slightly diminish in length, so that those of the 

 5 th pair reach only by the dactylus and two-thirds of the propodus beyond the scale. The 

 propodi are considerably longer than the carpi, those of the 3" 1 pair are just one and two-thirds 

 as long, while the propodi of the 5" 1 pair are one and four-fifths as long as the carpi; the 

 slightly curved dactyli that bear 4 or 5 spinules at the base of their posterior margin, are 

 rather long, measuring one-third of the propodi. 



General distribution: Arafura Sea, south of New Guinea. 



8. Plesionika bifw-ca Alcock & Andersom PI. XII, Fig. 31 — 31/^. 



Plesionika bifurca A. Alcock & A. R. Anderson, Journ. Asiat. Soc. Bengal, Vol. LXIII, 



pt. 2, 1894, p. 155. 

 Pandalus (Plesionika) bifurca A. Alcock, Descr. Catal. Indian Deep-Sea Crustacea, Calcutta 



1901, p. 98. 

 Illustrations of the Zoology of the Investigator, Crustacea, PI. LI, Fig. 6. 



Stat. 5. March 10. y c '46 S., ii4°3o'.5 E. Bali Sea. 330 m. Bottom mud. 1 young specimen. 

 Stat. 38. April 1. 7°35'.4S., II7°28'.6E. Bali Sea. 521 m. Bottom coral. 1 adult male. 

 Stat. 45. April 6. 7°24'S., u8°i5'.2E. North off Sumbawa. 794 m. Bottom fine grey mud, 



with some radiolariae and diatomes. 2 ova-bearing females, 1 male and 1 young 



specimen. 

 Stat. 178. Sept. 2. 2°4o'S., I28°37'.5E. Ceram Sea. 835 m. Bottom blue mud. 7 young and 



medium-sized specimens, among which 1 ova-bearing female. 

 Stat. 212. Sept. 26. 5°54'.5S., I2Ó°I9'.2E. West of Saleyer. 462 m. Bottom fine grey and 



green mud. 1 adult male. 

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



upper layer more liquid and brovvn mud. 1 young male and 1 ova-bearing female. 

 Stat. 314. Febr. 17, 1900. 7 36' S., ii7°30'.8E. North of Sumbawa. 694 m. Bottom fine, sandy 



mud. 4 adult females, 3 of which are ova-bearing, and 2 young specimens. 

 Stat. 316. Febr. 19, 1900. 7°i9'.4S., Ii6°49'.5 E. Bali Sea. 538 m. Bottom fine, dark brown 



sandy mud. 9 full-grown egg-laden females and 2 young specimens. 



Though all these 3 1 specimens certainly belong to the above-mentioned species, they 

 differ from the figure 6 of the "Illustrations'* by the rostrum (Fig. 31) being more acuminate, 



