f'ltrsTACKA — Will li;i.K(iGB. 153 



Ijowcr Ixirdcrut' (lie liaml nearly ciiu.-il Id (lie iiici'us aixl cai'piis 

 conil)iii(Ml ; upper Ijorder sliorter than tlie depth of the palm at 

 the base of the fingers ; inner surface of pahn convex, smooth, 

 glossy, with or without one or more minute granules near the 

 centre ; distal and outer lower surfaci; smootli ; ujjper and external 

 surfaces spinose and setose ; the spines are shorter and st(jut(!r 

 than those on the carpus ; the proximal half of tlio lower iiordei' is 

 somewhat angular and granulose. 



Fingers dark brown, the colour failing to reach their leases ; 

 iinier margin of each armed with four denticles, those on the 

 lower being the most distinct ; mobile finger granulose at the 

 base, without grooves ; immobile with a groove on each side. 



Ambulatory legs moderately elongate ; tlie first is the shortest ; 

 tlie merus joint is trigonus ; the superior border is arcuate and 

 acute, and has four small curved spinules on the median portion 

 and a straight spine at the distal extremity ; the inferior borders 

 are more or less granulose ; anterior and posterior surfaces naked 

 and smooth in all the legs, except the last paii', in which the 

 merus is clothed with short hairs and stiff sette. 



Carpus about one-fourth shorter than the propodus ; a little 

 compressed ; its depth is greatest at the distal end, and the upper 

 border has three longish spinules, two on the proximal half and 

 one at the distal extremity. 



Propodus subcylindrical, deepest aboiit the middle, with the 

 lower border arcuate, unarmed but clothed with long sette. 



Tarsus a little longer than the carpus, compressed, tapering to 

 the short hooked claw ; upper border with numerous short hairs, 

 lower with a few short curved set^e. 



Inner margin of merus joint of the external maxillif)edes some- 

 what produced and denticulate. 



The description has been drawn from an adult male ; the female 

 does not present any marked differences. 



This species is closely allied to Fifamnus normanii, Miers, but 

 differs from it in having the lower external surface of the palm 

 smooth, in wanting an external orbital spine, and in having the 

 mei^al and carpal joints spinulose 



Length of cai^apace 



Breadth „ 



Length of larger chelipede 



Depth of palm at base of fingers 



Length of first ambulatory leg 



,, of third ,, ,, 



,, of spines on carpal joints 



,, of second antero-lateral spine 



,, of inferior orbital spine 



Five examples of this form were obtained — four females and 

 one male, off Coogee and Port Kembla, in 49 to 75 fathoms. 



7-5 



mm 



9 





12 





45 





11 





13 





0-9 





1-5 





0-8 





