1 895- No. 8. SOUTH-AFRICAN ENTOMOSTRACA. 1 3 



As in most other species, the general form of the body (see figs. 

 9 & 10) appears rather short and stout, nearl}' globular. 



The carapace exhibits, in a lateral vie^v of the animal (fig, 10), a 

 rounded quadrangular form, with the dorsal margin more or less curved, 

 according to the degree of distention of the matrix with eggs or embryos. 

 The ventral edges are nearly straight in the middle, but join the anterior 

 and posterior edges by a rather pronounced, though quite even curve. At 

 the junction between the posterior and dorsal edges, the carapace projects as 

 a short angular prominence, which is located considerably above the longi- 

 tudinal axis. Seen from above (fig. 9), the carapace appears very tumid, 

 though the greatest width is not generally equal to the height. 



The head (see also fig. 11) is much depressed and procumbent, being 

 defined from the carapace above by a deep depression. Its dorsal face 

 is somewhat flattened, and exhibits in the middle a very slight sinus, 

 beneath which is formed a somewhat prominent, obtusely rounded frontal 

 part. The inferior part of the head is produced to an acute rostral pro- 

 jection pointing obliquely behind, and somewhat resembling a bird's beak. 

 The fornix is rather prominent, but quite simple, without any projecting 

 corner. 



The surface of the shell is everywhere distinctly reticulated with 

 rather large, and mostly hexagonal meshes (see fig. 13). This reticulation 

 is, as usual, especially conspicuous on the valvular part of the carapace, 

 but also occurs on its dorsal part and on the head (see fig. 1 1), though 

 here somewhat more irregular. The free edges of the valves are per- 

 fectly smooth, without any denticles or bristles. 



The eye (see figs. 9, 10, 11) is rather large, and located just within 

 the obtusely rounded frontal part of the head. The crystalline bodies 

 are not ver}^ conspicuous, though, on a closer examination, several of them 

 are seen projecting from the edge of the black ocular pigment. 



The ocellus is ver}- small, punctiform, and located at some distance 

 behind the eye, near the base of the antennulas (see fig. 11). 



The latter appendages (ibid) are, as in the other species of the genus, 

 movably articulated to the sides of the head, projecting generally down- 

 wards. They are of moderate size and subfusiform in shape, but do not 

 extend beyond the tip of the rostrum, except by the terminal fascicle 

 of olfactory papillae. Anteriorly, they have each a very long sensory 

 bristle, which arises from a knob-like projection, and extends for- 

 wards. 



The antennæ are well developed and of the usual structure. They 

 have each at the base, exteriorly, an unusualh' long sensory bristle, which, 



