Species of Maioid Crustacea. 9 



wrist with small tubercles ; palms smooth, longer than the 

 wrists ; and fingers straight, smooth. Ambulatory legs with the 

 antepenultimate joints longitudinally sulcated, but not dilated 

 (as in the preceding species). Postabdominal segments (of 

 the female) smooth, distinct. Length of carapace to base of 

 rostrum 1| inch. 



Bab. ? 



The form and extreme shortness of the spines of the rostrum 

 serve to distinguish this species from its congeners. 



Paramiihrax {Paramiihrax) sj)inosus } sp. n. 

 (PL IV. fig. 5.) 



Carapace subpyriform ; surface covered with small scattered 

 granules, and with spines disposed as follows — an acute 

 spine, followed by a rounded tubercle, on the gastric region, a 

 bituberculated prominence on the cardiac region, two spines 

 on each branchial region, a spine on the intestinal region, and 

 a very small spine on the posterior margin of the carapace. 

 The spines of the upper orbital margin are blunt ; and posterior 

 to them, on the antero-lateral margins, are one or two small 

 spinules. Spines of rostrum divergent and acute. Pterygo- 

 stomian regions granulated. Basal antenna] joint rather nar- 

 row, longitudinally sulcated, and with a small tubercle at its 

 antero-external angle. Merus joint of outer maxillipedes small 

 and without a distinct notch at its antero-internal angle. 

 Anterior legs (in the male) robust ; arm granulated on its 

 outer surface, and with two or three spinules above ; wrist 

 spinulose above and with a dentated crest on its outer surface ; 

 palm compressed and perfectly smooth ; fingers arcuate and 

 meeting only at the tips, which are denticulated and acute ; 

 there is a strong tubercle on the inner margin of the upper 

 finger near the base. Ambulatory legs slender. Postabdo- 

 minal segments distinct, the terminal one the longest. Length 

 to base of rostrum -§- inch. 



Hah. Norfolk Island, on a fish taken at a depth of 23 

 fathoms {H.M.8. l Herald:) 



One male individual is in the collection. This species, in 

 the form of the merus joint of the outer maxillipedes, ap- 

 proaches Acanihoplirys. It comes near in external appearance 

 to specimens in the Museum collection from Australia and 

 New Zealand, which I formerly referred to P. Gaimardi, 

 M. -Edwards, but now to P. sternocostulatus, M.-Edw., but 

 differs in the number and position of the spines on the bran- 

 chial regions and lateral margins, and in the much slenderer 

 basal antenna! joint, which has not two spines at its distal 

 extremity. 



