KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 3. 7 



of the second gnathopod opposite the end of the finger is slightly greater than that 

 of the Cape Jaubert specimens as shown in fig. 2 b. The female differs from the 

 male chiefly in the first gnathopod which has the basal joint somewhat widened and 

 the carpus and propod differing a little in shape, the propod being oval and less 

 truncate at the extremity, as may be seen by comparing figs. 2 a and 2 c. 



The second gnathopod of the female differs little from that of the male but 

 may have the propod less developed and the palm more evenly convex. 



It will be seen that the first gnathopod in the female approaches more nearly 

 to the structure of this appendage in Leucothoe, thongh it has the carpus and propod 

 much shorter and stouter and the finger less well developed. 



Haswell's description and figures apply to the male only. He says that the 

 dactyl is absent in the first gnathopod, but I have found it present both in male 

 and female specimens though it is small and partly concealed by the propod, as 

 described by Stebbing. 



In the specimens I have examined the anterior margin of the propod of the 

 second gnathopod is more convex than in the two figures given by Haswell. 



The type specimens were from Port Jackson, East Australia. One specimen 

 was taken by the »Thetis> expedition off Wollongong, a little further south. 



Parelasmopus suluensis (Dana). Fig. Sa— c. 



Parelasmopus suluensis Stebbing, 1888, p. 1029, pl. 100, and 1906, p. 417. 

 Parelasmopus suluensis Walker, 1904, p. 27S, pl. VI, fig. 38, and 1909, p. 334. 



Locality. Forty-five miles W. S. W. of Cape Jaubert, N. W. Australia, 72 ft. 

 One immature male, three females. Same locality, 48 ft. One adult male. 



These specimens agree closely with the description and figures given by Steb- 

 bing of the »Challenger» specimens. The male there described is doubtless immature 

 like one of those in the present collection; the mature male has the palm of the 

 second gnathopod (fig. 3 b) transverse as described and figured by Walker for the 

 Ceylon specimens. Walker notes (1909, p. 334) that one male from the Red Sea 

 has the dactyl of the second gnathopod blunt at the point. In the first gnathopod 

 of the adult male (fig. 3 a) the setae are arranged in the same way as in Elasmopus 

 bicarinaius and other species of Elasmopus, the oblique row on the side of the propod 

 being well marked. In the fifth peraeopod of the adult male (fig. 3 c) the basal 

 joint is moderately expanded and has the posterior margin irregularly serrate and 

 fringed with long slender hairs. In the immature male this margin is more distinctly 

 serrate and without the long hairs; this appears to be the case also in the male 

 figured by Stebbing (1888, pl. 100). 



In the dorsal teeth on the posterior segments of the body and in numerous 

 other respects this species resembles Elasmopus diemenensis (Haswell) from Bass 

 Strait. It differs however in the possession of a pair of dorsal teeth on the seventh 



