CANADI.W llslir.RIES i:\ I'KIUTIOS , tOl'rl'j 



t97 



Second foot : B 1 has an acuiniiiatioii ou the outer margin like that on the third 

 foot but standing closer into the border, convex inner margin below the Si with long 

 cilia. Ri does not reach distal margin of Re 2; spiniiles on posterior surface of Ri 2: 

 2 + 2 + 2, the largest is the outer one of the proximal couple, the smallest is the 

 inner one of the «ame couple. The spinules on the posterior surface of Re are: on 

 Re 2 a transverse row of seven distal spinules continued proximad on the inner side 

 by three longitudinally placed spinules, the whole forming a continuous arc; spinules 

 on Re 3, two arcuate rows, namely: a distal arc of small unequal spinules, the two 

 lowest of the arch being level with the bases of Se 2 and Si 3 ; a proximal arc between 

 the bases of Se 1 and Si 2, the three inner spinules much larger than the rest. 



Third foot (fig. 20 A aJid B) : the character of B 1 and the spinulation of the rami 

 are shown sufficiently in the figures; several minimal spinules at level of Si 2 on i)os- 

 terior surface of Re 3. otherwise no perceptible spinulation on that joint. 



Fig.' 20 Same. Third foot. 

 A. Anterior surface, including B 1. B. Posterior surface, including Re 3. 



