682 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [180] 



Plate XL. 



Fig. 173. Polynoe aurantiacaY. One of the parapodia, enlarged fifteen diameters; 

 dc, dorsal cirrus ; d, small dorsal lobe, which is destitute of setse ; v, 

 ventral lobe ; sv, superior ventral setse ; iv, large inferior ventral setae ; a, 

 one of the superior ventral setse, enlarged eighty diameters. 



Fig. 173 a. The same. One of the scales, enlarged four diameters. 



Fig. 174. Polynoe (Sarmothoe) imbricata. Dorsal view, enlarged two diameters. 



Fig. 174 a. The same. Part of a scale, enlarged thirty diameters. 



Fig. 174 fe. The same. Setas, enlarged forty diameters ; d, one of the stout dorsal setse ; 

 V, v', ventral setse. 



Fig. 175. Leanira roiusta V. One of the parapodia, enlarged twenty diameters ; Ir, 

 branchial lobe of the dorsal side ; e', e", e"', line of cilia occupying the 

 space between the branchial and setigerous lobes ; p', slender papillse of 

 the dorsal branch ; p'', p'", similar appendages of the ventral branch ; w, 

 ventral cirrus; da, aciculum of the dorsal branch ; va, aciculum of the 

 ventral branch ; ds, dorsal setae ; »', s", a'", s"", various forms of setse of 

 the ventral branch ; a, tip of one of the slender simple setse ; b, tip of 

 one of the compound ventral setae, much more enlarged. 



Fig. 164. Notophyllum Americanum V. Head and anterior segments, enlarged eight 

 diameters ; a, posterior end of the same specimen. 



