CIIU.STACEA — WniTKLKCOK. 



277 



niuoli longer than the second. Flagelliini six articulate, the first 

 and second joints subequal, the third is tlie longest. Peduncle 

 of second antennie slightly longer than the flagellum ; the first 

 joint stouter, and a little shorter than the second ; third joint 

 equal to the two preceding, but much shorter than the fomth. 

 Flagellum with ten joints, the first and second equal; and twice 

 as long as the fourth, which is the shortest in the basal two- 

 thirds. Mandibles stoutish, strongly bent in their distal half. 

 Cutting edge tridentate, with an accessory threc-tootli lolje, 

 scarcely inferior in size to the apical process, at the base of whicli 

 there are seven or more curved spines, bearing uniserial spinules. 

 Molar tubercle well defined, acuteh^ produced below and encircled 

 with spines. Palp three-jointed, the first nearly one-third longer 

 than either of the two succeeding. The first maxillce have the 

 inner branch narrow and tipped with branched setse ; the 

 outer branch is rather stout, and bears about ten curved spines 

 at its summit ; the inner series are furnished with denticles along 

 their apical margins. Second maxillae with the inner lobe 

 slightly longer and broader than the outer. 



First pair of legs short and stouter than those following ; 

 second joint of all the legs, except the last, very broad, with a 

 keel-like margin, which is often interrupted in the middle. The 

 propodal joints are long, and exceed any of those preceding, 

 except the second. Thelast joint has a single stout sette between 

 the two very unequal spines at its extremity. The fourth and 

 sixth joints of the first pair of legs are armed inferiorly with a 

 series of small spinules ; the fifth and sixth has, in addition, a 

 long spine on the distal extremity. The inner ramus of the first 

 pair of pleopods is subtriangular, and much wider than high ; the 

 outer ramus oblong, with a subtruncated summit. The inner 

 ramus of the second pair is rather 

 larger than that of the first ; the 

 outer ramus is oblong, and tipped with 

 six or seven stout spines, and a spini- 

 form process on the outer distal angle. 

 The marginal setae of the first three 

 pairs are all strongly developed; there 

 is no sutural line in the outer rami of 

 the third pair, and both rami of the 

 fourth and fifth have branchial pleats. 

 The rami of the uropods are subequal 

 in length and breadth. Since the 

 :above was written a single male 

 example has been found. It differs 

 from the female in having the last 

 segment of the perafon longer, with 

 the granuliferous ridges of the pleon 

 more distinctly developed and becoming 

 .■spinulous. The posterior border of the 



Second Pleopod. 

 Fig. 366. 



