AUSTBA1IAN MALACOSTBACA. 15 



with four compressed cristif orm teeth, of which, the last is broader 

 than the rest and bifid, and four below ; the carpus with two 

 sinuous or entire crests, separated by a deep groove ; the 

 propodos smooth, slightly dilated, its digital prolongation and 

 the mobile dactylos each with a rounded tooth at their base, and 

 meeting only near their apices, where they are armed with a row 

 of about half-a-dozen small teeth. Chelipedes of the female 

 differing from those of the male in having the propodos smaller, 

 the digits less arched and without a tooth at the base. First 

 pair of ambulatory legs longer than the rest, as long as the 

 carapace and rostrum ; all four pairs covered with hooked hairs 

 and with a spine at the end of the meropodite. Carapace 

 ornamented with bunches of hooked hairs. Total length 

 13/ltiths of an inch; breadth from tip to tip of anterior 

 branchial spines nearly an inch. 



Port Stephens, dredged in about five fathoms. 



25. Paramithrax Coppingeri. A.M. 



Pmramifh/rax Coppingeri, Haswell, Proc. Linn. Soc. N.8.W., 

 Vol. vi. 



Carapace armed in the middle line with four spines, the first 

 two large and placed near one another on the middle of the 

 gastric region ; the remaining two small and situated near the 

 posterior border ; between the two pairs, on the cardiac region 

 a transversely placed pair of divergent spines, the bases of 

 which nearly meet in the middle line. Two prominent spines 

 directed upwards, backwards, and outwards on each branchial 

 region. Rostral cornua very long, slender and slightly knobbed 

 and incurved at the extremity. Upper orbital border with three 

 straight acute spinous teeth, behind which are two post-orbital 

 spines separated by deep fissures from one another and from the 

 upper orbital border; the posterior spine the larger, broad, 

 compressed, and obliquely truncate. A prominent, sometimes 

 sub-bifid tooth behind this on the border of the hepatic region. 

 Basal joint of the external antennae with a short tooth at the 

 proximal end of its outer border, with a very prominent com- 

 pressed tooth directed outwards at the distal end of the same 

 border, and a third, somewhat smaller, directed downwards and 

 forwards at the inner and distal angle ; flagellum longer than 

 the cornua of the rostrum. Merus of chelipedes armed above 



