DORSIBRANCHIAT.E. 135 



By the name of Marphis^, M. Savigny distinguislies those spe- 

 cies, otherwise very similar, in wliioh the two tentacula on the nape 

 are wanting ; their upper cirrus is very short *. 



A species at least closely allied to them, — A^. tubico/a, Miill., 

 Zool. Dan., I, xviii, 1 — 5, inhabits a horny tubef. 



After these genera with complex branchiae, we may place tliose 

 wliere they are reduced to simple laminae or slight tubercles, or in 

 which they are even replaced by cirri. 



Some of them are still allied to the Eunices, by the strong arma- 

 ture of their proboscis, and their azygous antennae. Such is the 



Lysidice, Sav. 



Where, Avith jaws similar to those of the Eunices, and even more 

 numerous and frequently azygous, the only branchite consist of three 

 tentacula and the cirri J. 



Aglaura, Sav^ 



The jaws of the Aglauree ai-e also numerous and azygous, con- 

 sisting of seven, nine, &c. ; but their tentacula are either wanting or 

 completely concealed ; their branchiae are also reduced to cirri §. 



Nereis, Cuv. — Lycoris, Sav. 



The true Nereides have an even number of tentacula, attached to 

 the sides of the base of the head, and a little furtlier forwards, two 

 others that are biarticulate, between wliich are two simple ones. 

 Their branchiae consist of small laminae between which is spread a 

 network of vessels ; each foot is also furnished Avith two tubercles, 

 two fasciculi of setae, one cirrus above, and another beneatli. 



Several species inhabit the coast of France ||. 



In the vicinity of these Nereides are grouped several genera in 



* Nereis sanguinea, Montag., Lin. Trans., XI, pi, 3. 



t After the Eunices probably should come the Nereis crassa, Miill,, Ver., pi. xii, 

 which, without having seen it, M. de Blainville proposes to refer to the genus 

 Eteone, Sav,, although the branchi:e of the latter are very different. 



X Lysidice Valentina, Sav.; — L. Olympiu, Id.; — L. galatina, Id., Eg., Annel., 

 p. 53. 



§ I unite the Aglaura and (Enones, Sav., and even certain species without 

 tentacula, left among the Lysidices by Messrs. Audouin and Edwards ; Aglaura ful- 

 gida, Eg. Annel., V, 2 ; — CEnone lucida, lb., f. 3. 



II Nereis versicolor, Gm., Miill., Wurm., VI ; — N. fimbriata, Id., viii, 1 — 3 ; — N. 

 pelagica, Id., vii, 1 — 3 ; — Terchella rubra, Gm., Bomme, Mem. de Fless., VI, 357, 

 f. 4, A, IJ ; — Lycoris agyptia, Eg., Annel., pi. iv, f. 1 ; — Lycoris mmtiu, Id. lb. f. 2; 

 — Nereis licaucoudrasii, Aud., and Edw., Littor. de la Fr., Annel., pi, iv, f. 1 — 7 ;— 

 Ner. i)ulsatoria, lb,, f, 8 — 13, 



N,B, The Nereis verrucosa, Miill,, Ver,, pi. vii, and incisa, Ott., Fabr., Soc, Hist. 

 Nat. Copenhag,, V, part I, pi, iv, f, 1 — 3, seem to have the head of a Lycoris, but 

 with long filaments in place of branchiae : they require examiaation. 



