SPLDEK CRABS.-- -RATHBrV 29' 



Genus ('ERATOCARcrNUS, Adams and Whit*:. 

 CERA TOO ARCINTJS DILATATUS, A. Milne Edward*. 



Ceratocarcinus dilatat-us, A. Milne Edwards. Nouv. Arch. 

 Mus. Paris, viii., 1872, p. 25(3. pi. xiv., tigs. 2-2c. 

 McCulloch, Rec. Austral. Mus.. ix., 1918. p. 338. 



Twenty miles north-north-east of Double Island Point, 

 Queensland ; 29-30 fathoms ; one female. 



The specimen is about half as big as the male figured by 

 A. Milne Edwards and differs from his illustrations in some 

 minor particulars. The carapace is narrower (length 6.6, 

 width 7.6 mm., horns included) arid is densely pilose, save 

 on the rostral and lateral spines, the protogastric and 

 branchial bosses and the antero-lateral margin : the rostral 

 horns are more oblique, the outer margins of the two horns 

 being obviously divergent ; they and the lateral horns are 

 truncate at tip : the pair of mesogastric and of cardiac 

 tubercles are inconspicuous, hidden as they are under the 

 heavy pile. Milne Edwards describes and figures the basal 

 joint of the antenna as wide (see his h'g. 2a), but it is no more 

 than half as wide as represented in the figure cited, the outer 

 half there shown being the thickened portion of the lower wall 

 of the orbit. 



