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02 



U7. (Icbicula exigua, n. sp. Plate II. fig. 4. 



Carapaoe (rostrum included), measured in the middle lino, hardly as long as 

 tho first 5 abdominal somites: it is out up by the /t'nea thcdassinicx and cervical 

 suture into siz completely isolated areas, namely, a gastric and cardiaco-intestinal 

 in the middle line, and a hepatic and branohial on either side. 



Tho rostrum, whioh is broadly triangular, reaches to the end of the 4th 

 joint of tho antenna] peduncle: it has a large spine on either Bide of its base, 

 behind whioh spine a line of tiny spinules runs towards the cervical suture. 

 Similar tiny spinules bound the lateral portion of the cervical suture. 



The anterior border of the earapaee, between the basal spine of the rostrum 

 and the cervical suture, is armed with 3 or 4 spines, and there is a (hepatic) 

 spine where the eervieal suture outs the Unea thaiassiniea. 



The 1st abdominal tergum is the shortest and narrowest, and the 6th is the 

 longest and next narrowest : the 2nd, 3rd and 4th do not differ mueh in breadth, 

 but the "2nd is as long as the 3rd and 4th combined : the 3rd, 4th and 5th are of 

 about equal length. The exopodite of the caudal swinunoret is larger and 

 longer than the ondopodite. which, again, is longer than the sulnpiadrate telson. 



The eyes are pale brown. The antennular and antenna] peduncles are of 



nearly equal length, but the former is far the more slender: the antennular 

 tlagella are hardly longer than their peduncle and are not nearly half the length 

 of the earapaee; the outer is very mueh thieker than the inner. The 1st. 3rd 

 and 4th joints of the antenna] peduncle have each a spine on the lower border. 



The slender external maxillipeds reach to the end of the antenna! peduncle. 



The 1st pair of thoracic legs are as long as the combined carapace and first 

 'J abdominal terga: all their joints, except the basis and daetylus. are spino-n : 

 the propodite, which is subcylindrical, is about twice as long as the carpus, and 

 about two-thirds as long as the merits : the daetylus, which is slender and 

 pointed, is about three-quarters as long as the propodite against which it can be 

 flexed at right angles, though in this position only its proximal end is in contact 

 with the propodite. 



The 2nd and 3rd pair of legs are a little longer than the carapace: in both. 

 S some spines along the posterior border of the merns and a spine at the 

 far end of the anterior border of the same joint, and 1 or 2 spines on both 

 borders of the carpus. 



The l:li and 5th pair of legs are shorter than the carapace, and decidedly 



mon r than the 2nd and 3rd pair; the 4th has '2 or 3 spiuules on the 



r of the merits, the 5th ends in a little claw-like daetylus which 



is turned forwards and forms with the produced opposite angle of the propodite 



an almost perfect chela. 



