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Gen. 25. Candacia, Dana, 1846. 



Syn : Candare, Dsuui. 

 Iphionyx, Kroyer. 



Generic Characters. Body generally rather robust, with the anterior 

 division more or less vaulted above, front narrowly truncate, with 2 juxtaposed 

 knob-like prominences below. Lateral corners of last segment of metasome more 

 or less produced, and, as a rule, asymmetrical in the male. Urosome of moderate 

 si/e, sometimes conspicuously asymmetrical in female ; 1st segment in male with 

 a projection on right side. Caudal rami comparatively small, seta3 subequal. 

 Eye present or wanting. Anterior antennae consisting in female of 23 or 24 

 articulations, the proximal ones somewhat irregular and partly dentate in front; 

 right antenna in male distinctly geniculate, with the terminal section very slender, 

 5-articulate. Posterior antennae with the outer ramus much smaller than the 

 inner and 5-articulate, 2nd joint much the largest. Mandibles with the mastica- 

 tory part very narrow and bifurcate at the tip, palp well developed, with the 

 basal part rather broad. Maxillae with the proximal appendicular lobe exces- 

 sively prolonged, rod-like, and carrying 3 unequal, incurved spines at the tip, 

 inner ramus of palp bent abruptly outwards, and having one of the apical setae 

 excessively prolonged, outer ramus wanting. Anterior maxillipeds exceedingly 

 large and powerful, being armed distally with a restricted number of very strong 

 falciform claws, digitiform lobes rudimentary. Posterior maxillipeds much reduced 

 in size, though of normal structure. Natatory legs with the rami very unequal, 

 the outer one much the larger and finely serrate along the exterior edge, terminal 

 joint occupying more than half the length of the ramus, and armed outside with 

 3 comparatively small spines. Last pair of legs in female very small, 3 articulate, 

 in male somewhat larger, left leg 4-articulate, right 3-articulate and terminating 

 in some species with an imperfect chela, in others with a slender deflexed, cili- 

 ated seta. 



Remarks. This genus was established by Dana as early as the year 

 1846. The name Candacia originally proposed was subsequently changed by 

 the same author to Candace, and the latter name has been generally used by 

 subsequent carcinologists. Dr. Griesbrecht, however, in his recent synopsis, has 

 restored the original name Candacia, and accordingly the name of the family 

 must be changed from Candacidce to Candadidae. The genus Iphionyx of Kroyer 

 it unquestionably identical with Dana's genus. We know at present of a con- 

 siderable number of species belonging to this genus, amounting to about 16 in 



