234 RECORDS OF THE AUSTRALIAN MDSEUM. 



border; tlie merus is mucli broader than long, with its outer 

 margins rounded, the inner truncate; it is pointed anteriorly, 

 with its autero-iuternal angle somewhat excavate. 



Chelipeds very unequal but of similar construction. The 

 upper margin of the merus is rugose, and terminates in an 

 obtuse tubercle ; the other margins are smooth. Car[)us 

 punctate ; with two inner spines, the antero-superior of wliich 

 is the larger. Hand smooth, without sharp angles; fingers of 

 the larger hand are widely gaping, meeting only at their tips, 

 and are denticulate along their whole inner margins ; the 

 upper has two groups of enlarged teeth, one near the base and 

 the other near the middle, while the lower has a very large 

 tooth between the two upper ones, and one in advance of it. 

 In the smaller hand the fingers meet along almost their whole 

 length ; the denticulations are subequal, but some are some- 

 what enlarged as in the larger hand. 



Meral joints of the ambulatory legs compressed, with three 

 ridges, one above and two below ; in the first three pairs the 

 upper portion of the basal half is rugose, but in the fourth 

 pair it is smooth. Carpal joints of the first three pairs with 

 one superior and two lateral ridges, the two latter terminating 

 in minute spines ; in the fourth pair the two lateral ridges are 

 obsolete. Propodus of each pair with several larger and 

 smaller spines on its upper and lower ridges, and one at the 

 termination of each. Tarsi with strong spines on each of the 

 four upper and lower angles. 



Breadth of carapace 44nim. ; length of carapace 31mni.; 

 fronto-orbital width 25mm. ; breadth of front 10mm. 



Female. — A female 38mm. wide, which was collected with 

 the male, differs in having the hands subequal in size and of 

 the same shape as the smaller hand of tlie male. The 

 branchial regions are less inflated so that the carapace is flatter 

 from side to side, and the cervical grooves are much less 

 evident. The abdomen completely covers the sternum, and is 

 widest between the fourth and fifth segments; its sides are 

 arcuate, narrowing evenly forwards to the obtusely angular 

 tips. In all other details the female appears similar to the 

 male. 



