DR. BATRJ) ON THE AMPHINOMACEA. 215 



Contributious towards a Monograph of the Species of Annelides 

 belonging to the AmpJdnomacea, with a List of the known 

 Species, and a Description of several new Species (belonging to 

 the group) contained in the National Collection of the British 

 Museum. To which is appended a short Account of two hitherto 

 nondescript Annulose Animals of a larval character. By W. 

 Bairt), M.D., E.E.S., &c. &c. 



(Plati-.s IV., v.. YT.) 



[Read April 2, 1868.] 



In the preceding volumes of the ' Journal of the Linnean Society,' 

 Vol. VIII. pp. 172-202, and Vol. IX. pp. 31-38, I have communi- 

 cated two papers to the Linnean Society, entitled " Contributions 

 towards a Monograph of the Apliroditaeca.'" In most of the systems 

 of arrangement of the Annelides, the species of the group Amphi- 

 nomacea succeed those of tlie Aj)J/rodif(tcea ; and I now propose 

 following up those papers by some contributions towards a further 

 knowledge of the species of Amphinomacea also. 



The few species known to Pallas and Grmelin were all arranged 

 in the genera AphrodUa and Terehella. Bruguiere first separated 

 them from AphrodUa, and formed a distinct genus to receive them, 

 to which he gave the name Amphinome. These worms difier much 

 from the Aphroditacea, by the want of those organs called elytra, 

 and by the presence of an uninterrupted series of branchiae, which 

 occur on almost all the segments of the body, and which do not 

 alternate, as in these latter, with cirri. Many of them are very 

 long and present a i:)lay of fine iridescent colours ; most of them 

 are natives of tropical seas. Since the genus Ampliinome was 

 formed by Bruguiere, great additions have been made, several 

 new genera and even distinct families have been formed ; and as 

 our knowledge of the various species which form this group in- 

 creases, it will no doubt be found necessary to form several more. 



Group A3IPHIN0MACEA. 



Ami)hinomeace8e, Johnston. 

 Am])hinomea, Kinberg, Cams. 



Family I. AMPHINOMID^. 



Amphinomea, Blainville, Grnbe, Sc-hmurda, Cams, E/ilers, Quatrefages. 

 Amphiuoniaja, Lalreille. 



15* 



