ABRA^'CIIIA. 3^7 



The Autitles possess a larje one, wllicli inhabits a tube of the consistence of leather. The PliyUorJoce maxillosa, 

 Riinzani, named Pohiodaiite by Reiiiieri, and Eumoipe maxima, 01<en, appear to be nearly allied, havinR the 

 same tninli and jaws, and neither ^eniis having perhaps been described from perfect specimens. Many species 

 01 Annelides remain, which have been too imperfectly described to admit of their beins characterized ; and the 

 Msiruwe, and two or three other genera of M. Savigny, must remain to be examined anew. 



Finally, we place here a new and very singular genus, which I name 



On.ETOPTERUS. 



Mouth with neither jaws nor trunk, but furnished above with a lip, to which three small tentacles 

 are altaclie.l. A disk then follows with nine pairs of feet, after which is a pair of long silky bundles 

 like two wings. Tlie lamina-formed gills are attached more towards the upper surface than the lower, 

 and range along the middle of the body. 



[Here also ought probably to be placed the genus 

 ^^|J/\^^A/^/V4'i^'Uj Peiipotus of Guilding, founded upon a West Indian 



Jh f ^ f f ' ^ H 1^ " 1 '^'^ *°fe species, which burrows in the sand, and which has 



'j\ II jjiiipiitf^ much perplexed naturalists as to its relations. JJy 



,1 LI, ^, , W>h\^ Guilding it was considered as molluscous; by Mac 



Leay as forming the passage between the lulidic and 

 the annulose auneli{k'us worms; whilst Gray iZool. 

 M'tsc. p. 6) asserts that it is anneltdous, and conuccts 

 Ni'rcts with Lumbricus.'] 



-."^tJi;yiv'i'A^vv^Hv>\M\,i' 



THE THIRD ORDER OF THE AXNELIDES,— 



An RANCH! A,— 



Have no respiratory organ appearing externally, and seem to respire eitlier, as in the 

 Earthworms, over the whole surface of the skin, or, as in the Leeches, bv internal cavities. 

 Some of them have yet bristles to serve for locomotion, of which others are deprived, and they 

 accordingly fall into two families. 



THE FIRST FAMILY OF THE AnRA^'CIIIA,— 



The Adr.vnchia Setiger,\, — 

 Which are provided with silky bristles, comprise the Earthworms and Naidcs of Lianaius. 



The Earthworms (f.uiiibricm, Linn.) — 

 Are characterized by a long, cylindrical body, divided by transverse furi'ows into a great number of 

 rings, and by a mouth without teeth : they require to be thus subdivided: 



TtiE True Eaixthw^orms {Lumiricufi, Cuv.) — 

 Have neither eyes, tentacles, gills, nor cirrhi : a distinct enlargement, particularly during the breeding 

 season, imlicates where they attach themselves to one another in the act of co|iulating. Internallv 

 they have a straight, wriidileil intestine, and some whitish glands towards the fore part of the liodv 

 which appe.ar to serve fin- generation. It is certain that they are hcrinaiihroditc, and it seems that 

 their contact only serves to excite each other to self-fecundation. Accorihng to IiL Montegne, the 

 eggs descend between the intestine and external envelope, as far as around the rectum, where thev 

 hatch, the young crawling out ahve by the anus. M. Dufour states, on the contrary, that they deposit 

 eggs analogous to those of the Leeches. Their nervous chord consists of a series of an infinitude of little 

 ganglia, serrated one against another.* 



M. Saviguy subdivides them further into Enterion, having on each ring four pairs of little bristles ci"-ht 

 throughout, to which belongs 



Tlie Common Earthworm {L. terrestris, Linn.).— This well-known species attains to nearly a foot in leu'^th ^vith 



* r is is ton. ini.n to vt-ry iLiiiiiy species, as r\I. SHvigny first observed. As nmny as twenty liave been been ehnracterize.). RI. Dimes otilv 



