no. 2067. NEW SPECIES OF CRABS— RATHBUN. 141 



fathoms; gy. m., s.; Mar. 2, 1909; station 5376, Albatross; one 

 female ovig. (type) , one juv. 



Type.— Cut. No. 46143, U.S.N.M. 



Dimensions. — Type female, length of carapace, 29.5 mm.; width 

 of carapace, 38.2 mm.; width between outer angles of orbits, 21 mm.; 

 width of front, 9.7 mm. 



Carapace very broad, with the antero-lateral margins very short 

 and the postero-lateral margins almost parallel; surface very convex, 

 both from front to back and from side to side, and covered with 

 closely set granules which are much depressed and obscure on the 

 posterior mesogastric and cardiac regions, elsewhere visible to the 

 naked eye. The antero-lateral margin bears two projections, a tuber- 

 cle distant from the orbit, and at a still greater interval a small for- 

 ward-projecting spine. This spine is proportionally larger in small 

 specimens. The postero-lateral margin has a small sinus some dis- 

 tance behind the spine. The anterior margin of the front is slightly 

 concave, being most advanced at the outer angles, and also a little 

 sinuous; the customary submarginal depression is hairy; sides of 

 front very oblique, the sulcus between front and orbits being well 

 marked. The upper margin of the orbit is concave, obscurely granu- 

 late, the lower margin has fewer, larger granules; the outer angle is 

 pronounced but not dentiform. 



The chelipeds (of the female) are rather elongate and unequal, 

 coarsely granulate except on the fingers; the merus has a large 

 tubercle on its upper margin; the carpus is considerably longer than 

 wide, and bears a long, stout, blunt tooth or spine at its inner angle 

 and a small, slender, sharp spine at its outer angle; the propodus is 

 very thick, having a smooth, blunt, longitudinal ridge running through 

 the middle of the inner surface. The larger palm is nearly one and 

 one-half times as long, measured on the upper margin, as it is high, 

 while the smaller palm is more than one and one-half times as long as 

 high; a shallow longitudinal groove runs along the outer surface 

 where it rounds into the upper surface. Fingers compressed, almost 

 meeting when closed, armed with several large teeth interspersed 

 with small ones, the larger dactylus bearing a large blunt, backward- 

 pointing tooth at its base. 



Legs very hairy, the last three joints clothed with long hairs which 

 in the first three pairs form a furry coat but in the last pair are mostly 

 marginal. 



This species has much in common with C. longimanus, especially 

 in the shape of wrist, chelae, and carapace; the carapace, however, 

 has more parallel sides behind the spines, the orbits are smaller and 

 there is no tooth outside the orbit, as in longimanus. The arm has 

 a tubercle in place of a spine; the wrist has a much smaller outer 

 spine, although the inner spine is similar in the two species; and 

 there is no prominent tubercle inside the palm. 



