58 THE VOYAGE OF H.M.S. CHALLENGER. 



Pagunis euopsis, Dana. 



Paguriis euopsis, Dana, U.S. Explor. Exped., vol. xiii., Crust., part i. p. 452, pi. xxviii. fig. 6, 

 1852. 



Habitat. — Station 172, off Nukalofa, Tongatabu ; depth, 18 fathoms; bottom, coral 

 mud. 



Two specimens (male and female) agree closely with Dana's description, though the 

 colours have somewhat faded. The joints of the apical half of the antennal flagellum 

 are characteristically gibbous on the inner side, and the haii-s on the limbs are of a 

 reddish colour, tipped with white. 



The ty|3es came from Upolu, Navigator Group, and Balabac Passage. 



Pagurus dearmatus, n. sp. (PI. VI. fig. 5). 



Characters. — The anterior portion of the carapace is somewhat square in outline with 

 a projection external to the insertion of each ocular peduncle, the surface tolerably smooth, 

 with a few hairs towards the margins ; the posterior portion is entirely membranous. 



The ocular peduncles are of large size, slightly flattened from above downwards, and 

 constricted towards the middle, which is crossed by a broad red band ; the cornese are 

 deeply pigmented and semilunar in outline when seen from above ; the ophthalmic scales 

 are broad at the base, their apices with three or four spines each. The antennal peduncles 

 extend almost to the end of the eye-stalks and are sparingly ciliated, the acicle is of 

 small size, not reaching beyond the distal end of the penultimate joint, the second joint 

 is moderately broad, with a slightly marked external prolongation. The terminal joint 

 of the autennular peduncle extends slightly beyond the apices of the eye-stalks. 



The left chelipede is considerably larger than the right, with its basal joints sparingly 

 ciliated ; the lower border of the merus is sharp and granulated ; the carpus is somewhat 

 trigonal, the upper border with two or three curved denticles, the outer surface with a 

 few granulations towards the anterior border ; the propodus is more than equal in length 

 to the merus and carpus taken together, its outer surface uniformly covered with fine 

 granulations, which show a tendency to become slightly coarser towards the apex of the 

 immobile finger, the upper border with a series of small denticles; the outer surface of 

 the dactylus is coarsely granular and its lower border irregularly dentate (as is also the 

 corresponding border of the immobile finger), the tips of both fingers are black and 

 corneous. The right chelipede is almost smooth, the joints being but slightly granulated, 

 though clothed with a few hairs ; the upper border of the carpus and propodus is 

 provided with marginal denticles ; both fingers possess tufts of hairs, and the lower is 

 moderately dilated. The ambulatory limbs are smooth and but sparingly ciliated ; the 



