Crustacean Fauna of South Africa. 287 
on the record of a specimen caught in 33° 23’ 8. 7° 40’ E. Whether 
this be counted within the South African region, it is interesting to 
record a specimen from a locality quit? near the South African coast, 
and moreover exhibiting features definite enough to characterise a new 
species. 
CYSTISOMA AFRICANUM N. sp. 
Head 30 mm. in length and about the same in breadth, depth 
indeterminable. Eyes contiguous, but diverging in the posterior 
quarter.” Lower lateral margins with 18 teeth, on the under surface 
of head near the mouth-parts 6 teeth, of which the Ist (anterior) 
is the largest and stands somewhat in advance of the rest. 
Pearaeon segments 1 and 2 apparently coalesced, the dorsal keel 
not markedly different from that of C. spinoswm, but the denticulation 
on the lateral portions of the posterior margins very inconspicuous. 
Ventral surface very much as described by Stebbing for C. spinosum 
(1888, l.c. p. 1328), the “ genital papilla,” however, not so elongate as 
figured by him (plate 154). The rudimentary branchiae present and 
very similar in shape. 
Both of the Ist antennae are broken, but apparently they would 
not exceed half the length of the head, there is a shght bend near the 
base, and the basal portion is stouter, but no suture is visible ; present 
length 8 mm. 
Epistome and upper lip similar to that of C. spinoswm, but upper 
lip not or scarcely at all asymmetrically cleft. 
Lower lip as in C. spinosum, but lobes more oblong, the apices 
roundly subtruncate. 
Mandibles very similar to those figured for C. spinosum, but trunk 
with 3 strong teeth on anterior margin, cutting-edge with 10 teeth, 
secondary cutting-edge with 15 teeth. 
First maxilla as figured for C. spinoswm. 
Second maxilla broad at base, a semicircular projection on inner 
margin with 4 small spinules, beyond this the inner margin narrows 
rapidly and runs nearly straight to apex, which bears fine acute teeth 
and small spinules on inner side. 
Maxilliped, inner plate with long keel on inner surface, ending some 
distance before apex, the inner concave distal margin with 2 spinules 
on either side of middle, outer margin similarly armed, the spinules 
very small, outer plates with 14 teeth on right and 10 on left (excluding 
the apical one), all the teeth more or less of the same size, except the 
basal ones which are smaller. 
