SPIDER CRABS. RATHBUN. 



REPORT ON THE SPIDER CRABS. 



THE Spider Crabs form a small but interesting part of the 

 Decapod Crustaceans collected by the "Endeavour." They 

 number twenty -seven species, nine of them new, and one 

 representing a new genus. The most notable are the new 

 species of tin- deep-water genus Cyrtomaia, with its formidable 

 armature of sharp spines ; the long-necked Ephippias, having 

 an exaggerated first ambulatory leg, and combining the 

 characters ol two subdivisions of the family Inachidae ; and 

 five species of Leptomithrax, including one distinguished by a 

 smooth round boss on the merus of the outer maxilliped. 



Mr. Allan R. McCulloch had begun a report on the crusta- 

 ceans, and later kindly sent me the drawings which he had 

 prepared. The originals of PI. xv. and Fig. 2 were drawn by 

 Mr. J. Si. K bighorn, of the Australian Museum, and of 

 PI. xiv. by Mr. McCulloch. The remaining drawings were 

 made by Mrs. R. E. Gamble, and the photographs by 

 Mr. J. H. Paine. 



Order DECAPODA. 



Suborder REPTANTIA. 

 Tribe BRACHYURA. 



Subtribe OXYRHYNCHA. 



Fam ily H YM ENOSOMID^E. 



Genus HALIOARCINUS, White. 



HALICARCINUS OVATUS, Stimpson. 



HaUcarcinus ovatux, Stimpson, Proc. Acad. Nat. Sci. Phila- 

 delphia, x., 1858, p. 109 [55] ; Smithsonian Misc. Coll., 

 xlix.. 1907, p. 146. Stebbbig, Proc. Zool. Soc. London, 

 1900. p. 52.1 pi. xxx vi. A. 



One male was taken at Oyster Bay, Tasmania, and four; 

 were without a definite locality label. 



These specimens agree with Stebbing's description and 

 figures of the species as compared with H. planatus (Fabricius). 



2 30 



