172 BULLETIN OF THE 



Station 3355. 182 fathoms. 1 male. 



This species differs much from the more typical species of Catapagurus, 

 G. sharreri A. M. Edw. and G. gracilis Smith, in the shortness of its chelipeds 

 and ambulatory limbs, the symmetry of its chelipeds, and the length of the 

 protruded vas deferens. It is more nearly related to G. australis Henderson 

 (Challenger Anomura, p. 76, Plate VIII. Fig. 1). It would seem to have a 

 close general likeness to Fagurodes piliferus Henderson, but the gills in 

 G. diomedece are of the phyllobranchiate type. 



Spiropagurus occidentalis, sp. nov. 



The carapace is smooth and naked except on the sides of the branchial re- 

 gions, where a few hairs arise ; the branchial regions are swollen, membrana- 

 ceous, and covered with a network of white lines ; the cardiac region is long 

 and narrow ; the portion of the carapace in front of the cervical groove is cal- 

 cified, produced in the median line anteriorly to form a short, broad, and obtuse 

 rostrum, which does not conceal the ophthalmic segment ; the lateral teeth are 

 acute, and project as far as the rostrum does ; they form a sharp demarkation 

 between the front and the oblique antero-lateral border of the carapace. 



The ophthalmic scales are triangular, with simple tips. The ocular peduncles 

 are enlarged at the distal end, hardly overreaching the distal end of the second 

 segment of the antennulary flagellum and the third segment of the antennary 

 flagellum. The last segment of the antennulary peduncle is more than twice 

 as long as the penultimate segment. The second segment of the antennal pe- 

 duncle is produced externally into a long, sharp tooth ; the antero-internal angle 

 is likewise armed with a small spine ; the acicle is long, sharp, curved, and 

 furnished with setae, as are also the several joints of the peduncle. 



The chelipeds are subequal, the right chela being appreciably larger than the 

 left ; the ischium is armed with about five denticles along the internal margin ; 

 the inner margin of the merus is armed with the same number of rather larger 

 teeth ; the inner margin of both of these segments is furnished with long and 

 slender seta? ; the surface of the carpus is rough with setiferous rugse, and is 

 armed with scattered spinules upon its upper face and with a row of larger 

 spines along the internal margin of the upper face. The external face of 

 the propodus is armed with spines which are regularly arranged in five longi- 

 tudinal rows ; only at the distal end of the propodus, at the base of the fingers, 

 do these spines lose their regular serial arrangement; from the bases of these 

 spines spring long setae; the fingers are acute, tuberculo-spinose and setose, like 

 the hand. The fingers of the left hand are longer in proportion to the palm 

 than those of the right hand. The ambulatory legs are rather robust, and longer 

 than the chelipeds; their lateral surfaces are smooth ; the upper margins of the 

 carpi are armed with a row of little spines, and the corresponding margins of 

 the propodi are denticulated ; the dactyli are longer than the propodi, but not 

 so long as the propodus and carpus combined ; the anterior pair of ambulatory 



