238 



PERCY SLADEN TRUST EXPEDITION 



ending at the dark colour on the distal extremity ; ringers broad and thick, brown except 

 for white tips ; the brown colour covers f of the length of propodus measured on lower 

 margin ; dactylus with three low prehensile teeth ; pollex with one larger tooth near 

 the tip ; a small tuft of yellow hairs on inner and outer sides of each finger on the 

 distal half. 



Legs of moderate length, fringed with long hair mostly on the anterior margin ; 

 merus, carpus and propodus spined anteriorly, a subdistal spine on posterior border of 

 merus of first two pairs ; dactylus bearing a double row of spines posteriorly and a few 

 spines anteriorly near the tip. 



Third, fourth and fifth segments of male abdomen fused. 



Dimensions in mm. : 



This species has the carapace broader and rougher, and the palms more elongate 

 than in other species of the genus. 



Catoptrics A. Milne Edwards. 



A series of 47 specimens in the collection shows that there are two well-marked 

 species, which occur together but are separable by a number of characters. 



C. nitidus. 



Carapace very convex, sloping evenly in all 

 directions. 



Outer margin of front sloping gradually into 

 posterior margin of orbit. 



Antero-lateral region and sub-orbital region with 

 some coarse granules mixed with the fine ones. 



Lateral teeth very uneven : the 2nd, 3rd, 4th and 

 5th decrease in size in order named. 



Lower margin of orbits armed with three denticles 

 or tubercles. 



Two spines on arm, one near each end. 



Distal half of fingers brown. 



Terminal segment of abdomen of ^ triangular, with 

 straight sides. 



Appendages of <$ abdomen with tips bidentate. 



C. incequalis. 



Carapace moderately convex, transversely flattened 

 for half its width. 



Outer margin of front nearly at right angles to 

 posterior margin of orbit. 



Antero-lateral region and sub-orbital region with 

 granulation uniformly fine. 



Lateral teeth : 2nd, 3rd and 4th nearly the same 

 size. 



Lower margin of orbit unarmed. 



One spine on arm, near distal end ; it may be 

 reduced to a small tooth, especially in larger specimens. 



Distal half of fingers pink. 



Terminal segment of abdomen of <J with sides 

 partly concave. 



Appendages of £ abdomen with tips slender, 

 acuminate. 



