172 PAGURID.E. 



forming- a short obtnse-aiigled rostnmi. The eye-stalks 

 are short, thick, armed with a broad, flattened, oval or 

 lanceolate tooth. The tliird joint of the internal an- 

 tennse scarcely extending beyond the basal portion of the 

 external ; the second joint of the latter is armed on its 

 outer side with a sharp tooth ; its palp spiniform, longer 

 than the eye-stalks, slender, and curved. The anterior 

 pair of legs very robust, thick, unequal, the right being 

 ordinarily the larger, — furnished with numerous isolated 

 tubercles, more or less spinous ; the wrist, which is nearly 

 as long as the hand, is dilated €ind spinous at the inner 

 margin ; the fingers obtuse and strongly tuberculated. 

 The second and third pairs of feet spinous on the upper 

 side, the last joint very long, strong, compressed, slightly 

 twisted, and a little thickened towards the extremity. 

 Posterior pairs of feet rudimentary, terminating in an 

 extremely short, flattened pincer. Abdomen in the female 

 furnished with four ovigerous false feet, each consisting of a 

 basal joint, which is elongate and cylindrical, and two 

 terminal laminar branches ; the fourth much the smallest. 

 In the male there are three false feet, composed of a basal 

 and a double terminal joint, one finger of which is laminar 

 and large, the other rudimentary. The terminal joint of 

 the abdomen is notched. 



The general colour is red, j^assing into yellow ; the abdo- 

 men brown. Usual length of the adult about five inches. 



I have thought it right to follow Dr. Edwards in 

 resuming for this species its generally received name, as it 

 is, in all probability, the one which Linnreus assigned to it, 

 notwithstanding the doubt which led Dr. Leach to reject 

 it, and to substitute for it the name of Strehlonyx, in 

 allusion to the peculiar tortuosity of the terminal joints of 

 the ambulatory legs. 



