220 Annals of the South African Museum. 
were collected at the same time of year, so that we have no idea of 
the possible seasonal changes in the two sexes. The hand of the 
2nd gnathopods (ordinary form) attains its distinctive shape much 
sooner than in 7’. capensis. Hermaphroditism may be the cause of the 
present “abnormal” form. A similar specimen with a 2nd gnathopod 
approaching the 9 form was found among the specimens of Paror- 
chestia tenuis (Dana). (See below.) 
TALORCHESTIA AUSTRALIS 0. Sp. 
(Plate XXVII. Figs. 33, 34.) 
Body not very broad. Eyes round, their distance apart equal to 
their diameter. Side-plates not very deep, 2 without a strongly pro- 
duced lobe on upper posterior angle, 5 almost as deep as 4, its lobes 
subequal in depth, its length equal to 14 segments. 
Pleon unarmed, postero-inferior angle of segment 3 quadrate, not 
produced. ; 
Telson with apical incision, spinose. 
First antenna reaching in g to middle, in 9? to end of penultimate 
peduncular joint of 2nd antenna, Ist joint a little broader than long, 
2nd and 8rd much more slender, 2nd 14 times as long as Ist, 5rd a 
little shorter than 2nd, flagellum equal to last two peduncular joints 
together, 6-joimted in g,4in @. 
Second antenna reaching in g to end of 3rd, in @ to end of 2nd, 
peraeon segment, penultimate joint stout, longer than ultimate, 
flagellum equal to penultimate joint, 15-jomted in g,183in 2. Both 
antennae feebly spinose. 
First maxilla, inner plates with 2 plumose setae, outer plate with 
9 spines. Remaining mouth-parts as in 7’. quadrispinosa. 
First gnathopod in ¢, 5th joint triangular, with a prominent apical 
lobe, 6th shorter than 5th, oblong inner apex produced as a subacute 
lobe, palm concave, finger reaching to end of lobe, unguis as long as 
finger, extending beyond lobe; in @ 6th joint simple, shorter than 
5th, 5th and 6th both with a long stout spine, as well as smaller 
spines, on inner distal margin, finger and unguis asin ¢. 
Second gnathopod in g, 6th joint suboblong, greatest width across 
the defining angle, palm nearly transverse, slightly convex, passing 
into the slightly shorter hind margin without any prominent angle or 
tooth, furnished with spines arranged mostly in pairs, finger match- 
ing palm, evenly curved; in 2 2nd joint not expanded on front 
margin, 4th with a not very produced apical lobe, 5th broadly lobed, 
6th as long as 5th, apical projection rounded, scarcely upturned. 
