
HALE—AUSTRALIAN CUMACEA 413 
dorsally, each as long as first three together, and with a pair of dorgo-lateral 
varinae; indications of similar ridges are present on the other somites. 
Pleon distinctly shorter than cephalothorax, the somites not differing much 
in length; sixth about half as wide again as long and two-thirds as long as fifth, 
telson obovate, subequal in length to sixth somite, without post-anal portion and 
With no discernible apical spines. 
First antenna robust, the first joint of peduncle as long as second and third 
together, the second wider but not longer than third; flagellum short, two-jointed, 
and accessory flagellum minute. 
Third maxilliped with basis equal in length to remaiming joints combined 
and with a spine at inner distal angle ; the other joints do not differ much in length. 

ha, lobo 

Fig. 40. Gynodiastylis quadricristata, type female; ps. lobe, pseudorostral lobe; ant., mxp. 
and prp., first antenna, third maxilliped and first to third peraeopods; urop., uropod with fifth 
and sixth pleon somites, and telson (all * 125), 
First peraeopod short, the carpus reaching beyond antennal angle but not 
attaining level of apex of pseudorostrum; basis fully as long as rest of limb; 
propodus barely two-thirds as long as carpus, not as long as ischium and merus 
eombined, and with three unequal inner distal setae, the longest about twice 
as long as the joint ; dactylus longer than propodus. 
Seeond peraeopod rather less than half as long as first, with the wide basis 
nearly half as long again as rest of limb; ischium distinct; merus subequal in 
length to propodus and longer than carpus or dactylus, which are of about the same 
length, 
Third and fourth peraeopods with merus more than half length of basis 
and not much longer than carpus and propodus together; propodal seta slender, 
reaching beyond, tip of distinetly separated daciylar claw; last of distal carpal 
setae stout not reaching to end of dactylus but preceding seta slender and attain- 
ing same level as that of propodus; fifth peraeopod two-thirds as long as fourth. 
Uropod short and robust; peduncle barely longer than telson, little more 
