82 Annals of the South African Museum. 



ELASMOPOIDES CHEVREUXI, n. sp. 

 Plate XXXIX. 



Head not rostrate, obtusely produced at the sides. Back smooth, 

 with saddle-shaped depression of fourth pleon segment. First side- 

 plate the largest, broadly rounded at the produced front, fourth 

 shallowly excavate behind, fifth and sixth each with a small front 

 lobe curving backward. First three segments of the pleon with 

 postero-lateral angles acute, a little produced, those of the third 

 segment least so. Eyes dark, of peculiar shape, the broad lower 

 part occupying the lateral lobes of the head, a narrower upper part 

 ascending at right angles to the lower, so that the eyes are not far 

 apart at the top. 



First antennas having two ridges on first joint, one ending in a 

 spine, the other in a little tooth, second joint as long as first, third 

 quite short, flagellum longer than peduncle, 42-jointed, accessory 

 flagellum more than half as long as primary, 23-jointed. Second 

 antennae subequal in length to first, fifth joint of peduncle a little 

 shorter than fourth, flagellum shorter than peduncle, 25-jointed. 



Upper lip with front margin almost symmetrically rounded. 

 Lower lip with principal lobes broad, inner plates well developed. 

 Mandibles with cutting edge strongly toothed, secondary plate on 

 left mandible stronger than that on right, teeth not prominent, spines 

 of spine-row numerous, molar prominent, second and third joints of 

 palp elongate, each with two rows of slender spines ; the articular 

 condyle between the molar and the palp very conspicuous. First 

 maxilla with inner plate large, oblong, fringed on inner margin with 

 very numerous setae, outer plate with the spines crowded together, 

 probably 11, some of them furcate ; second joint of palp long, fringed 

 with 7 apical spines, some of which are moderately stout, and 6 sub- 

 apical, all slender. Second maxilla having the outer plate rather 

 longer but narrower than the inner, fringed round the apex, the inner 

 plate with a fringe along inner margin continued only a little way 

 round the broad apex, and an oblique row of seta-like spines extend- 

 ing from near the apex to the proximal end of the marginal fringe. 

 Maxillipeds with inner plates broad, fringed on inner and distal 

 margins, the latter having three small spine-teeth at its inner part, 

 outer plates not reaching middle of palp's long second joint, fringed 

 with numerous spines and spine-teeth ; fourth joint of palp long, 

 finger-like, curved, finely spinulose on inner margin, as long as the 

 third, shorter than the second joint. 



First gnathopods. Second joint with a row of seta; on distal part 



