112 



d^ Behind the pair of large spines at the base of the rostrum is 

 a second pair of smaU spines; a spine near the middle of 



the anterior border of the 2"*^ abdominal pleura .... atlantica Xorman 

 (A. M. Norman, Proc. Roy. Soc. of Edinburgh, Vol. XI, 1881—82, p. 684). 



d„^ Behind the pair of spines at the base of the rostrum no second 

 pair of small spines occurs; no spine on the anterior border 



of the 2"^^ abdominal pleura Cat^penteri W.-Mas. 



(J. Wood-Mason, Proc. Asiatic Soc. Bengal, 1885, p. 70). 



b,-. Rostrum without lateral spines : a pair of small spines overhang the 



cervical groove from behind, in the middle line ensirostris Alcock 



<?j The exopodite of the tail-fan is not fissured ; rostrum with lateral spines ; 

 at least one spine on the anterior edge of the 2"<^, 3''' and 4"^ 

 abdominal pleura Stthi/ii Sp. Bate. 



I. Nephropsis Steivarti W.-Mas. (PI. Ill, Fig. 17). 



Nepliropsis Steivarli J. Wood-Mason, in: Journal Asiatic Soc. of Bengal, Vol. XLII, Pt. II, 



1873, p. 40. 

 Ncphropsis SteiK.'arti A. Alcock, A descriptive Catalogue of the Indian Deep-Sea Crustacea, 



Calcutta, 1901, p. 159. — Illustrations of the Zoology of the Investigator, Crustacea, 



Plate XXVII, fig. I. 



Stat. 262. December 18. 5°53'.8S., I32°48'. 8E. 560 m. Solid bluish grey mud, upper layer 

 more liquid and brown mud. i young female, without eggs. 



This specimen is 60 mm. long, the rostrum measuring 10 mm., the carapace 17 mm., 

 the abdomen t,t^ mm. The rostrum, the extremity of which is slightly turned upwards, extends 

 by one-fourth of its length beyond the antennular peduncles. The fine groove that runs in the 

 mid-dorsal line of the rostrum up to the small, oval, gastric tubercle, is bounded on each side 

 by a ridge ; these two ridges that diverge from one another at the level of the large teeth 

 near the base of the rostrum, are denticulate from just behind the lateral spines as far as 

 the small gastric tubercle, the sharp teeth, however, very small on the posterior divergent parts 

 of the ridges, are larger and spiniform on the proximal half of the rostrum. Wood-Mason 

 describes these ridges as granulated (I.e. p. 41), but neither he nor Alcock makes mention of 

 spiniform teeth. 



The abdominal pleura appear to project somewhat more outward, when the animal is 

 looked at from above, than in the figure 1 of Plate XXVII of the quoted "Illustrations", and 

 the basal joint of the caudal swimmerets ends posteriorly in a small sharp spine. Alcock says : 

 "the abdominal terga have no trace of median carination". In the young specimen from the 

 Kei-islands the 6"^ tergum presents a very low and obtuse, median carina and a less distinct 

 trace of it is even recognizable on the 5'''. The posterior border of the telson is a little more 

 curved than in the figure of the "Illustrations". 



The flagella of the external antennae are iio mm. long, almost twice as long 

 as the body; in figure i of the "Illustrations" they appear just as long as the body, but in 



