SPIKOPAGURUS OCCIDENTALIS. 59 



Length of carapace, 5.5 mm. ; abdomen, 8 mm. ; cheliped, 12.5 nun.; 

 last ambulatory leg, 17.5 mm. ; ocular peduncle, 2.5 mm. 



Station 3355. 182 fathoms. 1 male, without carcinoecium. 



This species differs much from the more typical species of Catapac/iirus, 

 C. 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.* 

 It would seem to Lave a close general likeness to Pagurodes jnlifer Hender- 

 son, but the gills in C. dionicdcce are of the phyllobranchiate type. 



SPIKOPAGURUS Stimps. 



Proc. Acad. Nat. Sci. Pbila., X. 236, 185S. 



Spiropagurus occidentalis Fas. 



Plate XIV., Fig. 1-1". 

 BuU. Mus. Conip. Zool., XXIV. 172, 1893. 



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

 regions where a few hairs arise ; the branchial regions ai'e swollen, mem- 

 branaceous, and covered with a net-work of white lines; the cardiac region is 

 long and narrow ; the portion of the carapace in front of the cervical groove 

 is calcified, 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 demarcation between the front and the oblique antero-lateral border 

 of the carapace. 



Tlie ophthalmic scales are triangular, with simple tips. The ocular pedun- 

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

 second segment of the antennular flagellum, and the third segment of the 

 antennal flagellum. The last segment of the antennular peduncle is more 

 than twice as long as the penultimate segment. The second segment of the 

 antennal peduncle 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 setJB, as are also the several joints of the 

 peduncle. 



The chelipeds are subequal, the right cliela being appreciably larger 



* Rep. Clialleuger Anomura, p. 76, Plate VIII. Fig. 1, 1S88. 



