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SPIROPAGUEUS OCCIDENTALIS. 



59 



Lengtli of carapace^, 5.5 mm.; abdomen, 8 mm.; cheliped, 12.5 mm.; 

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



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



V 



This species differs much from the more typical species of (Jatapagiirusy 

 C. sharreri k. 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 * 



Wi 



son, but the gills in (7. diomedece are of the phyllobranchiate type. 



\ 



SPIROPAGURUS SriMrs. 



Proc. Acad. Nat. Sci. Pliila., X. 336, 1858. , 



Spiropagurus occidentalis Fax. 



Plate XIV., Fig. 1-^TK 



Bull. Mus. Comp. Zool., XXIV. 172, 1893. 



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

 rcf^ions where a few hairs arise ; the branchial regions are swollen, mem- 



branaceous, and covered with a net-work of white hues; the cardiac i-egion is 

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

 is calcified, produced in the median hue anteriorly to form a short, broad, 

 and obtuse rostrum, Avhicli docs 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. 



The 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 llagellum, and the third segment of the 

 antennal llagellum. 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-intornal angle is likewise armed with a small spine; the acicle is long, 

 sharp, curved, and fuinished with seta), as are also the several joints of the 



peduncle. 



The chelipeds are subequal, the right cliela being appreciably larger 



* Rep, Challenger Anomura, p. 1^, Plate VIII. Fig. 1, 1888. 



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