20 CLASS ANNELIDA. , 



Savigny, vvliich nevertheless would appear to have gills al- 

 together different. 



After these genera with complicated gills, we may place 

 those in which they are reduced to simple laminae, or even 

 to slight tubercles, or, in fine, in which the cirrhi alone 

 supply their place. 



There are some which still are related to Eunice by the 

 strong armature of their proboscis, and by their antennae being 

 of odd numbers. 



Such are, 



Lysidice, Sav., which with jaws similar to those of 

 Eunice, or even more numerous, and often of odd numbers, 

 have but three tentacula, and some cirrhi for gills, Lysidice 

 Valentina, Sav. ; L, Olympia, id. ; L. galatina, id., Eg., 

 Annel. p. 53. 



Aglaura, Sav., have also numerous jaws, and of odd 

 numbers, as seven, nine, &c. ; but they want tentacula, or 

 have them altogether concealed. Their gills are also reduced 

 to the cirrhi. 



T unite the AGLAURiE and the QENONiE of Savigny ; and 

 even certain species without tentacula, which MM. Audouin 

 and Milne Edwards leave in the Lysidicae, Ag. fulgida, Eg. 

 Annel. v. 2 ; (Enone lucida, ib. f. 3. 



Nereis, (proper) Cuv., Lycoris, Sav., have tentacula of 

 even numbers, attached to the sides of the base of the head, 

 and a little further forwards, two others, biarticulate, between 

 which are two simple ones. They have but one pair of jaws 

 in their proboscis ; their gills only form small laminae, over 

 which is spread a net-work of vessels. There are, besides, 

 to each foot two tubercles, two bundles of bristles, a cirrhus 

 above, and another below. 



We have a tolerable number of them on our coasts. Nereis 

 rersicolor, Gm., Mull., Wurm. vi. ; N. Fimhriata, id. viii. 

 1 — 3 ; N. Pelagica, id. vii. 1 — 3 ; Terebella rubra, Gm., 



