394 



Div. 3. AliTlCULATA— ANNELIDES. 



Class 1. 



Pleione, Sav. {Amphinome, Blainv.), whicli, with the same tentacles, have crest-like gills. These also are from 



the East Indies, and attain a great size. 



To these may be s.Med^Euphrosine, Sav., which has but one 

 tentacle to the head, together with arbuscular gills, very 

 much developed and complicated ; and to which the genus 

 Anisteria, Sav., established on a mutdated individual, should 

 probably be approximated ; and, lastly, 



Hipponoc, Audouin & Edwards, which, devoid of caruncle, 

 has only one cirrhus and packet of bristles to each foot. There 

 is one at Port Jackson, U. Gaud'tchaud'd, Aud. & Ed. 



Fig-. 203. — Eaplirosine la»ireata. 



Eunice, Cuv. — 

 Is likewise furnished with tuft-like gills, but tlie trunk 

 is formidably armed with three pairs of differently-formed horny jaws ; each of their feet has two 

 cirrhi and a bundle of bristles ; and there are five tentaeles upon the head above the mouth and two 

 on the neck. Some species only exhibit two small eyes. M. Savigny's family of Eunices is constituted 

 by this division, and the particular genus is termed by him Leodice. 



A species, from one to four feet in length, inhabits the sea around the Antilles {E. gigantea, Cuv.), which is the 

 largest Annelide known. Some upon our coasts are much smaller. 



M. Savigny distinguishes by the name of Marphisia certain species, otherwise very similar, which have no 

 nuchal tentacles, and the upper cirrhus of which is very short, as Nereis sanguinea, Montagu. An allied species 

 (iV. tubicola, MuUer), inhabits a horny tube. 



After these genera with complex branchire, are placed those in which the organs adverted to are 



reduced to simple lamina;, or even to slight tubercles, or which, lastly, are represented only by the 



cirrhi. Some of them resemble Eunice by the powerful armature of the trunk, and by their antennna 



of unequal number. Such are 



Lycidice, Sav., — 



Which, together witli the jaws of Eunice, or even a greater number than in that genus, and often un- 

 equal on the two sides, have but three tentacles, and cin'hi to perform the office of brauchia;. 



Aglaura, Sav, — 

 Have likewise numerous jaws, of an unequal number, seven, nine, &c. ; but no tentacles, or which are 

 entirely hidden ; and the gills are similarly reduced to cirrlii. 



Under this name I unite the Aglaura and (Eiione of Savigny, and even certain species without tentacles, which 

 MM. Audouin and Edwards leave in Lycidice, as Ag.fidgida and 02. lucida. 



The Nereids, properly so called {Nereis, Cuv. ; Lycoris, Sav.). 



Tentacles of an even number, attached to the sides of the base of the head, two other biarticulated 

 ones a little more forward, and between these two simple ones ; only one pair of jaws within the 

 trunk ; the gilis formed of little laniina, traversed by a network of vessels ; and at each of their feet 

 two tubercles, tw'o ])undles of bristles, and a ciiThus above and below. 



A great number of species inhabit our coasts. 



[The species here (igared, N. prolifera (.Mid- 

 ler, Zool. Dan.), exhibits a singular peculiarity 

 in its mode of propagation, merely by sponta- 

 neous division, the hind part of the body being 

 graduiilly tiaiisformcd into an additional animal, 

 the head and tentacular cirrhi being already de- 

 veloped. Midler describes one mother, to which 

 three foetuses, of different ages, appeared in one 

 length. The mother had thirty segments, the 

 young one nearest to it had eleven, and the two 

 hinc'er, or older ones, seventeen segments each.] 



After these should rank various genera, equally distinguished by a slender body, and gills reduced to 

 simple lamina;, or even to simple filaments or tubercles. Several, however, have no jaws nor tentacles. 



Phyllodoce, Sav. {Nereiphylla, Blainv.), — 

 In common with the Nereids proper, have tentacles of even number at the sides of the head, and four 

 or five small ones anteriorly. They have distinct eyes; their large trunk is furnished with a circlet 

 of very short fleshy tubercles, does not contain jaws, and, what particularly distinguishes them, lliefr 



Fif;. 204.-Ncrcis prolift-ra. 



