by Rev. T. R. R. Stebbing. 67 
EXHYALELLA NATALENSIS, Stebbing. Plate XI. 
1917. Exhyalella natalensis, Stebbing, Ann. Nat. Hist., ser. 8, vol. 
xx, p. 435. 
The body as preserved smooth, shining, rather obstinately curved. 
The first four side-plates deep, the first rather expanded distally, the 
fifth bilobed. Eyes dark, round or oval. 
Flagellum of first antenna many-jointed, about twice as long as the 
peduncle, equal to flagellum of the second antenna, which is sub-equal 
to its peduncle, that having its last joint longer than the penultimate 
Mandible with cutting edge and accessory plate dentate, spine-row 
of three moderately long and three short spines; molar strong. 
Inner plate of first maxilla slender, with two apical sete, one quite 
short, outer plate with eight pectinate spines, prominence for palp 
well marked, but palp itself microscopic. The two plates of second 
maxilla well furnished with spines. Maxillipeds with inner plates 
long, the outer short, the palp’s first three joints broad, the fourth 
slender, ending in a distinct unguis. 
First gnathopod of male with fifth joint longer than sixth, the distal 
projection carrying small spines, the hand with squared palm, carrying 
a strong spine, on which the apex of the short finger impinges. In 
the female this gnathopod is slighter, the fifth joint not longer than 
the hand, which is about twice as long as broad. Second gnathopod 
of male with short fifth joint or wrist, of which a narrow lobe 
intervenes between the oblong fourth joint and the large piriform 
hand. The long, oblique, spine-fringed, slightly convex palm leaves a 
very short hind margin. The finger is strong and curved. In the 
female this model is followed, though with shorter third and fourth 
joints, a smaller hand and its hind margin not serrate. 
The first and second perzopods are slender, the three following have 
each an expanded second joint, the following joints, except to some 
extent the fourth, being slender. The third perzeopod is the shortest, 
the fourth somewhat longer than the fifth. 
The first and second uropods have the usual proportions and 
armature; the third are very small, with the peduncle much larger 
than the ramus. The telson is about as broad as long, apically 
obtuse-angled, more obtusely in the female than in the male. The 
colour as preserved is orange red. The length appears to be about 
11 mm. for the male, and a little less for the female. The young are 
born with their full complement of limbs. 
Locality: Durban Beach, where they were collected by Mr. Bell 
Marley. A small specimen also was obtained from the sponge Cerao 
chalinus, off Vetch’s pier, 
