60 STALK-EYED CRUSTACEA. 



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 setas ; the surface of the carpus is rough 

 with setiferous rugas, 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 propodite is armed with spines which are 

 regularly arranged in five longitudinal rows ; only at the distal end of the 

 propodite, 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 stout and longer than the chelipeds ; their 

 lateral surfaces are smooth; the upper margin of the carpi is armed with 

 a row of little spines, and the corresponding margin of the propodites is den- 

 ticulated ; the dactyli are longer than the propodites, but not so long as the 

 propodites and carpi combined ; the anterior pair of ambulatory legs differs 

 from the posterior pair in having the dactylus and propodite a little shorter, 

 and the lower edge of the merus more hairy and minutely spinulose. The 

 telson is deeply cut by a broad median notch in its hind margin into two 

 lobes, the left of which is the larger. The margins of both lobes are spinose. 



There is (in the alcoholic specimens) a narrow red ring around both 

 fingers near their tips, a broader band of the same color around the base of 

 the fingers, and a red spot on the inner side of the anterior face of the hand. 



Length of carapace, 6.5 mm. ; greatest breadth of carapace, 6 mm. ; 

 length of ocular peduncles, 2.3 mm. 



Station .3368. 66 fathoms. 1 male. 

 " 3379. 52 " " 



Carcinoecium : PIws. 



This species, like S. iris A. M. Edw., is characterized by the spiny armature 

 of the chelipeds. It differs from *S'. irk in having a smaller number of spines 

 upon the anterior face of the chela, and in their arrangement in a few defi- 

 nite longitudinal rows, the surface between the rows being spineless and 

 reticulated. The chela does not display the lively iridescence so striking in 

 Milne Edwards's species, nor are the ophthalmic scales bidentate at the end. 

 The merus of the third maxillipeds is not armed with a distal spine as in 

 S. iris. 



