
HALE—AUSTRALIAN CUMACEA 119 
and 19:5 mm. in length. It has the same general plan of seulpture as its ally, 
the Austro-Malayan persculpta Calman (1905, p. 3, pl. i, fig. 1-8), but presents 
a number of obvious differences. 
This young specimen offers an interesting comparison with the juveniles of 
tribulis in that the seulpturing is more massive than in the subadult; the condi- 
tion is reversed in tribulis. 
CYCLASPIS MAWSONAE sp. Nov. 
Adult male. Integument strongly calcareous. 
Carapace a little less than one-third of total length, twice as long as deep 
and a little wider than deep; in profile the dorsal margin is slightly convex, with 
a shallow indentation at about middle of length. 

HH. 
Fig. 40. Carapace of paratype male of Cyclaspis mawsonae (X 42). 
The carapace is coarsely reticulately pitted, with a fine reticulate back- 
ground pattern as described for usitata, but the coarse reticulations are particu- 
larly large and distinct and their edges, arranged end to end, play an impor- 
tant part in the formation of longitudinal ridges (see fig. 40) ; the limy granules 
of the integument are thick on the raised edges of the large reticulations, but the 
bottoms of the pits are less calcified (fig. 41 D, by transmitted light). 
The anterior transverse carina crosses the back and continues to the sides, 
where it traverses the two antero-lateral tubercles; from the lower of the last- 
named a longitudinal ridge, emphasized by the edges of the large reticulations, 
runs back to the hinder margin of the carapace; beneath this a similar ridge ex- 
tends from below the antennal tooth to the inferior margin, near its hinder end; 
above it the edges of the reticulate pits mark less defined longitudinal carinae 
and there is a dorso-lateral ridge; the posterior transverse ridge is absent, but is 
indicated by a scarcely discernible irregularity of the surface; there is a blunt 
dorsal longitudinal ridge. Pseudorostral lobes barely reach to level of apex 
of ocular lobe, which is moderately wide, with bisinuate anterior margin, and 
bears seven pigmented lenses, arranged as in fig. 41 C. Antennal notch rather 
narrow and antennal tooth subacute; pseudorostral suture fused. 
Pedigerous somites together two-thirds as long as carapace; first somite con- 
cealed; second, fourth and fifth somites each with an elevated carina, that of 
