
HALE—AUSTRALIAN CUMACEA 403 
like setae; infero-lateral corners of these somites armed with a tooth, below which 
is a smaller tooth; sixth somite almost as long as fifth, dilated at hinder end, where 
it is distinctly wider than long, and nearly twice as broad as deep; the somite is 

Fig. 32. Gynodiastylis mutabilis, juvenile female; bottom, lateral view of whole animal 
and cephalothorax from above (% 38); oc, lobe and ce. pace, ocular lobe and anterior part of 
carapace (* 72); ant., first and second antennae (X 72); mxp, and prp., third maxilliped, and 
first, second and fourth peraeopods (X 72); urop., uropod with fifth and sixth pleon somites, 
and telson ( 72); tels. 1., telson and sixth pleon somite from the side (X 72); tels. v., ventral 
view of distal end of telson ( 250). 
dentate-carinate inferiorly, the ridge terminating posteriorly in a strong spine, 
on, each side of which is a similar projection about half the length of the median 
spine; telson a little longer than any other of the pleon somites, with two tooth- 
like projections on each side and with a short post-anal part, furnished with two 
tiny terminal spines; on the underside there is a longitudinal median ridge 
