282 



" THETIS " SCIENTIFIC RESULTS. 



First axd Fourth Legs. 

 Fig. 38e. 



First pair of legs slender, the succeeding pairs increasing in size to 

 the seventh. The fourth, fifth and sixth joints of the first pair 

 are armed inferiorly with numerous stoutish pectinated spines ; 

 the fourth joint has four 

 or five similar spines on 

 the superior distal bor- 

 der, and the last joint 

 has an accessory spine 

 at the base of the 

 strongly curved claw ; 

 the inferior border ex- 

 hibits a stoutish spine, 

 with a series of uniserial 

 spinules which diminish 

 in size as the base is 

 approached. Stout pec- 

 tinated spines are 

 present on the superior 

 distal borders of the fourth joint of all the legs ; the second to 

 the seventh pairs of legs have an encircling series of similar spines 

 situated on the distal margin of the fifth joint. Peduncles of 

 the pleopods with several prominent spines on the interno-distal 



angle. The outer rami 

 of the first and second 

 pairs are ovate; the inner 

 rami are oblong, with 

 straight inner margins. 

 The third paii- has the 

 outer rami broadly ovate 

 and sparsely ciliate at the 

 distal borders ; the sutu- 

 ral line in the outer ramus 

 is faintly indicated at the 

 sides. The fourth and 

 fifth pairs have their 

 rami of subequal size and 

 shape ; the outer rami 

 are without sutural lines, 

 and the inner rami are 

 destitute of pleated folds. 

 The outer ramus of the 

 fifth pair has the inner margin armed with three isolated patches 

 of rasp-like teeth, one in the middle, another at the distal third, 

 and the last near the apex. 



The uropods have the basal joint bifurcate, the external lobe 

 is directed outwards, the inner lobe backwards, the somewhat 



Skcon'd Plkopod. 

 Fig. .38 f. 



