423 



legs well developed, with the outer ramus rather large, inner ramus much shorter 

 and in all 3 pairs 3-articulate, 1st joint, however, very small; natatory setae on 

 both rami much reduced in number. Last pair of legs somewhat resembling in 

 structure those in Ameira. 



Remarks. This genus was established in the year 1899 by Th. Scott, 

 to include the species P. fairliensis. As observed by that author, it exhibits 

 some affinity, partly to the genera Canthocamptiis and Attlieyella, partly to the 

 genus Mesochra, though differing in some points materially from each of these 3 

 genera. In addition to the typical species, the form recorded by Th. Scott as 

 Mesochra proplnqua ought evidently to be referred to the present genus, as also 

 the new species described below. 



Phyllocamptus minutus, G-. 0. Sars, n. sp. 



(Suppl. PL 44). 



Specific Characters. Female. Body moderately slender and slightly tapered 

 behind. Cephalic segment about the length of the 3 succeeding segments com- 

 bined, and not very deep; rostral prominence extremely small, knob-like. Urosome 

 somewhat shorter than the anterior division, and having all the segments perfectly 

 smooth; last segment nearly as large as the preceding one. Caudal rami scarcely 

 longer than they are broad at the base, apical setse normal. Anterior antennae 

 not attaining the length of the cephalic segment and rather thick in their proximal 

 part, being composed of 8 joints clothed with rather slender setse, the first 2 

 joints much larger than the others, 3rd and 4th joints of about equal size, terminal 

 part considerably exceeding in length those joints combined. Posterior^ antennae 

 with the distal joint fully as long as the proximal one and slightly widening 

 distally, outer ramus resembling somewhat that in the genus Nitocra, being con- 

 spicuously compressed and provided with 3 thickish setse, the innermost of which 

 however is very small. 1st pair of legs with the outer ramus rather strongly 

 built and only slightly shorter than the inner; its terminal joint larger than either 

 of the other 2, and armed with 3 strong spines and 2 slender geniculate seta? ; 

 inner ramus with the proximal joint slightly dilated and carrying inside, behind 

 the middle, a well-developed plumose seta, distal joint almost as long as the 

 proximal one, but much narrower, linear in form, and armed on the tip with a 

 claw-like spine and a very long seta accompanied inside by a thin bristle. The 

 3 succeeding pairs of legs with the outer ramus much produced and strongly 

 spinous outside, its first 2 joints without any seta? inside, terminal joint long 

 and narrow, with the inner edge quite smooth in the 2 anterior pairs, in 4th 



