ORDER DORSIBRANCHIA. 19 



MM. Audouin and Edwards approximate to the amphi- 

 noma3, Hipponoe, which have no caruncle, and but a single 

 bundle of bristles, and a single cirrhus to each foot. 



There is a species belonging to Port Jackson, Hipponoe 

 Gaudichaudii, Ann. des Sc. Nat. t. xviii. pi. vi. 



Eunice, Cuv., 



Have also gills in the form of plumes, but their proboscis is 

 powerfully armed with three pairs of corneous jaws differently 

 formed. Each of their feet has two cirrhi, and a bundle of 

 bristles. Their head has five tentacula above the mouth, and 

 two at the nape. In some species only there are two small 

 eyes. 



Eunice is the name of a nereis in Apollodorus. M. Savigny 

 makes it the name of a family, and gives to the genus the 

 name of Leodice ; M. de Blainville has changed these 

 names, first into Brancliionereis, and then into Nereidon. 



The sea of the Antilles possesses one species of more than 

 four feet long, Eun. gigantea, Cuv., which is the largest of 

 the known annelida. 



There are several on our coasts less considerable in size ; 

 such as Nereis Norwegica, Gm., Mull., Zool. Dan. I. xxix. 1 ; 

 N. pinnata, ib. 2 ; N. Cnprea, Bosc, vers. I. v. 1. ; Leodice 

 Gallica, and L. Hispanica, Sav ; Leod. antennata, Sav. 

 Annel. pi. iii. fig. 1 — 4; Eun. harassii. ib. fig. 5 — 11. 



M. Savigny distinguishes from them, under the name of 

 Marphis^, species otherwise very similar, but which want 

 the two tentacula in the nape. Their upper cin-hus is very 

 short ; Ner. sanguinea, Montag., Linn. Trans, xl. pi. iii. 



A species at least closely allied, N. Tuhicola, Mull., Zool. 

 Dan. I. xviii. 1 — 5, inhabits a corneous tube. 



It is probably near Eunice that should come the Nereis 

 crassa, Mull., Vers., pi. xii., which M. de Blainville, without 

 having seen it, proposes to refer to the genus Eteone of M. 



C 2 



