bo 
32 Annals of the South African Museum. 
two forms are found chiefly in the Cape series, but would probably 
also be found at East London if a larger series was collected. 
HYALE DIASTOMA Ni. sp. 
(Plate XXVIII. Fig. 3.) 
¢. Body somewhat iridescent, dorsally rounded. Eyes moderate, 
subcircular. Side-plate 1 not greatly widened below. Postero-inferior 
angle of 3rd pleon segment quadrate, not produced, posterior margin 
with 3-4 very slight serrations. Telson, lobes oblong, apically 
rounded-truncate. 
First antenna reaching beyond peduncle of 2nd antenna, 2nd and 
3rd joints subequal, flagellum 12-jointed, with not very dense whorls 
of short setae. 
Second antenna stout, nearly half length of body, ultimate joint 
longer than penultimate, flagellum 14-jointed, with dense whorls of 
long setae (denser and longer on lower surface). 
First gnathopod ¢, 2nd joint proximally narrow, distally greatly 
widening but front apex only feebly lobed, 5rd not lobed, inferior 
margin of 4th straight, lobe of 5th not apical and not extending 
beyond 4th, setose along whole margin, 6th oblong, inferior margin 
distally setose, palm a little oblique, defined by 2 spines, setose, finger 
matching palm. 
Second gnathopod ¢, 2nd joint with a well-developed rounded lobe 
on front apex, 5rd not lobed, 6th shortly oblong, palm nearly trans- 
verse, sinuous—.e., concave near hinge and defining angle, convex in 
middle, defining angle shortly produced, with 2 spines, finger stout, 
curved, inner margin sinuous like the palm, concave proximally and 
distally, convex in middle, so that when finger is closed a more or less 
circular loophole is left at base of finger. 
First to fifth peraeopods, finger distinctly denticulate, seta on inner 
apex stout, hind margin of 6th joimt of peraepods 4 and 5 smooth, 
inner margin without serrate spines, hind margin of 2nd joint in 
peraeopods 3 and 4 smooth, in peraeopod 5 with a few widely spaced 
setuliferous indents. 
First uropod, 1 marginal spine on outer ramus near apex and | near 
apex and | in middle on inner ramus. 
Third uropod, peduncle and ramus subequal. 
Length: 7 mm. 
Colour: Claret, eyes black. 
Locality : Sea Pomt, near Cape Town. 13/4/14. (K.H.B.) 4 ¢ 2. 
The ? has not yet been recognised. (S.A.M. No. A3039.) 
