16 ATTSTEALIABT MALACOSTBACA. 



■with, four compressed teeth of which that situated at the distal 

 end is very prominent ; carpus with two denticulated crests. 

 First pair of ambulatory legs a little longer than the chelipeds ; 

 all the ambulatory legs armed at the extremity of the merus 

 with a long, slender, cylindrical spine which (like the spines of 

 the carapace) is slightly knobbed at the apex. Length one inch. 

 PortMoUe, Whitsunday Passage. (W.A.H., H.M.S. "Alert.") 

 This species belongs to the same section of the genus as P. 

 acuhatus, P. longispinus, P. spatulifer, P. acanthonotus, P. verru- 

 eosipes, and P. halimoiies ; its nearest ally being P. longispinus, 

 De Haan, from which it is distinguished by having none of the 

 supra-orbital spines recurved. In the structure of the antennary 

 region it approaches Chlorinoides, mihi, but like the rest of the 

 species mentioned has the ambulatory legs much shorter than in 

 that genus. 



Sub- Genus Leptomithraoc, Miers. 



Anterior legs in the male elongated, slender, hand and wrist 

 sub-cylindrical, fingers meeting along their inner edges when 

 closed ; wrist simply granulated, without longitudinal ridges. 



26. Leptomithrax australiensis. 



Leptomiihrax australiensis, Miers, Ann. and Mag. N. H. (4) 

 xvii., p. 220. 



Eesembling generally L. longinianus, but with the carapace 

 covered with small spinules, and with three or four larger spines 

 upon the branchial regions. Anterior legs shorter ; hand slightly 

 compressed and granulous at the base ; palm about as long as 

 the wrist. Whole animal covered with short stiff hairs, curled 

 at the tips. [M.] 



Tasmania (Brit. Mus.). 



27. Leptomithrax spinulosus. A.M. 



Leptomithrax spinulosus, Haswell, Proc. Linn. Soc. N.S.W. 

 Vol. iv., p. 441, pi. xxv., fig. 3. 



Carapace much longer than broad, covered with short spinules 

 and hooked hairs. Lateral margins with eight pointed spines, 

 the first two close together, separated by a wide interval from 

 the third. Posterior border with two short spines. Eostrum of 



