
116 RECORDS OF THE S.A. MUSEUM 
Posterior to the middle of the length there is a pair of blunt tubercles (corre- 
sponding to the large postero-lateral prominences of the adult female); from 
each of these a faintly defined posterior transverse ridge runs obliquely back to 
meet, near inferior margin of carapace, a still fainter ‘‘ridge,’’ which curves back 
from the lower of the antero-lateral prominences; these carinae, with the obsolete 

Fig. 37. Cyclaspis tribulis, adult male; A, lateral view; B, carapace from above; C, terminal 
joints of second peraeopod (A and B, X 11; C, X 84). 
dorso-lateral ridge, enclose an area which is seareely at all concave. Dorsum 
with a median, smooth longitudinal carina, irregularly expanded, particularly 
at base of ocular lobe and posterior to the pseudorostral lobes, where a few lateral 
projections extend from it, as in the adult female; immediately behind pseudo- 
rostral lobes an irregular flattened carina extends sideways to each of the upper 
antero-lateral tumidities, forming a cross with median carina. Pseudorostral 
lobes not quite reaching to level of apex of ocular lobe, which is narrow, widest 
anteriorly and bears distinct lenses. Antennal noteh wide and antennal tooth 
obtusely angular. 
First pedigerous somite concealed; second elevated dorsally, and third to 
fifth with dorsal carinae. 
Pleon very much more robust than in adult female; each somite with median 
carina, produced a little backwards on first four somites (as on last pedigerous 
somite) ; first five with distinct articular pegs; fifth somite about one-fourth 
as long again as the others, which are subequal in length. 
