172 BULLETIN OF THE 
Station 3355. 182 fathoms. 1 male. 
This species differs much from the more typical species of Catapagurus, 
CO. sharreri A. M. Edw. and C. 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 C. australis Henderson 
(Challenger Anomura, p. 76, Plate VIII. Fig. 1). It would seem to have a 
close general likeness to Pagurodes piliferus Henderson, but the gills in 
C. diomedee 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 sete, 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 sete; the surface of the carpus is rough with setiferous ruge, 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 sete; 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 
