220 Mr. E. J. Miers on new Species of Crustacea. 



fingers leaving a space at base when closed. The carapace, 

 when the hairs are removed, appears covered with naraerous 

 wart-like minutely punctulated flattened tubercles. 



Length 2 inches, breadth 1^ inch. 



Should this species, on comparison with specimens of both 

 ages and sexes from Australia, prove distinct from P. harhi- 

 cornis, it may be designated by the name of P. LatreiUei. 



2. Leptomithrax, subgen. nov. 



Anterior legs in the male elongated, slender ; hand and 

 wrist subcylindrical ; fingers meeting along their inner edges 

 when closed ; wrist simply granulated, without longitudinal 

 ridges. 



This subgenus is intermediate between the true Paramithrax 

 and Maia of the northern hemisphere. From the latter genus 

 it is distinguished by the much narrower interorbital space and 

 the basal joint of the external antennte, the flagellum of which 

 arises from the orbital margin, and not from within the orbital 

 cavity as in Maia. It includes the Paramithrax Edwardsii^ 

 De Haan, the Main avstralis, Jacq. & Lucas, and the following 

 species : — 



Lejytomithrax longimanus, n. sp. Type, B.M. 



Carapace triangular ; branchial regions convex on the sides ; 

 depression separating the branchial from the cardiac, gastric, 

 and hepatic regions deep and well-defined ; carapace, arms, and 

 wrists covered with a close velvet-like pubescence, and with 

 small scattered granules. Spines of rostrum long. Antero- 

 lateral margins destitute of spines. Anterior legs very long, 

 about twice as long as the carapace ; hand slender, cylindrical, 

 and minutely granulous. Ambulatory legs slender, closely 

 pubescent. 



Length 1| inch, breadth 1| inch, 



Hab. New Zealand. 



This species is distinguished by the great length of the 

 anterior legs, and the absence of spines on the antero-lateral 

 margins. The male only is known. 



Leptomithrax australiensis , n. sp. Type, B.M. 



This species bears a general resemblance to the foregoing ; 

 but the carapace is covered with small spinules, and there are 

 three or four larger spines upon the branchial regions. Ante- 

 rior legs shorter ; hand slightly compressed and granulous at 

 base ; palm about as long as the wrist. The whole animal is 

 covered with short, stiff hairs, curled at the tips. 



Hah. Tasmania. 



