
Hacte—AUSTRALIAN CUMACEA 397 
lobe these continue to the apex of the psenudorostral lobes; on each side of frontal 
lobe there is a slight excavation, margined by a faint dorso-lateral curved ridge, 
conspicuous mainly because of its line of rather pointed granules, which run 
from the end of each of the aforementioned posterior carinae towards the front. 
of pseudorostrum; each side has a shallow depression, not emphasized by any 
trace of ridges or folds, and below it the lower part. of carapace is rounded, tha 
inferior margin incurved, Antero-lateral margin shallowly concave, and antennal 
angle rounded, granulate. Pseudorostral lobes pointed in front, meeting for a 
distance equal to nearly one-fifth of length of carapace, Frontal lobe obscurely 
defined ; ocular lobe wide, with no apparent eyes. 
' 
ij 

x ao 28, GCynodiastylis roscida, type female; lateral view and cephalothorax from above 
Pedigerous somites together abont two-thirds as long as carapace, the pleural 
parts of all exposed; second and third not greatly expanded on sides, but pleural 
portions probably more produced in adult; second, fourth, and fifth somites each 
with a pair of strong dorgo-lateral carinae, those of the last two somites particu- 
larly strongly elevated, almost eristiform; there is sore sparse granulation. 
Pleon twice as. long as pedigerous somites together, and thus considerably 
shorter than cephalothorax; on each side of the first to fifth somites there is a 
low dorso-lateral, longitudinal serrated eresi, directed outward and so most 
prominent when the animal is viewad from sbove (fig. 29, urop) ; sixth somite a 
little wider than long, not very conspicuously shorter than fifth, and with traces 
of serrated crests only near anterior end; telson broadly ovate, plump, without 
any post-anal part, without spines, but with a few serrations on sides near apex, 
which bears two pairs of insignificant bristles. 
First antenna robust; proximal segment of peduncle longer than second and 
third joints together, with a strong distal tooth; second and third subequal in 
length, but second much the wider and with two spine-like distal teeth; the short 
flagellum is two-jointed, the accessory (whieh is about half as long as the main 
Jash) two-jointed with possibly a small third basal segment. Only three joints 
ean be made out in the second antenna, which is tiny. 
Mandibles with ten and eleven spines. 
