242 CLASS vn. 



tentacular cirri at the base of the head in the first segment of the 

 body; two cirri in each segment. Proboscis thick, cylindrical, 

 armed with two horny exserted jaws. Body elongate, with nume- 

 rous segments. 



A. The dorsal pinna of the feet confluent with the ventral or 

 not distinct, without branchial appendages. Lycastis SAV., AUD. 

 and EDW. 



B. The dorsal pinna distinct from the ventral, with aciculus 

 and bundle of setas at the extremity of each, and appendages or 

 lacinise supplying the office of gills. Lycoris SAV., Nereis of 

 Authors. 



Sp. Nereis nuntia, Lycor. nuntia SAV. Descr. de VEgypte, Annel. PL iv. fig. 3, 

 GUE"RIN Iconogr., Annel. PI. 7, from the Red Sea ; Nereis pelagica L., 

 BASTER NatuurJc. Uit-sp. n. Tab. vi. fig. 6, OERSTED Grcenl. Annul, p. 175, 

 Tab. iv. figs. 53, &c. 



ffeteronereis OERST. 



Sp. Heteronereis arctica OERST. 1. 1. Tab. iv. fig. 51 ; Nereis grand i folia 

 RATHKE, Beitr. z. Fauna Norwegens, pp. 155, &c. 



Family XII. Eunicece. Body elongate, with numerous seg- 

 ments. Kudiments of feet supplied with a single pinna, a terminal 

 setiferous tubercle, and two cirri. Proboscis armed with seven, 

 eight or nine horny jaws. Branchiae in some none (cirri supplying 

 the office of branchiae) , in others above the dorsal cirrus adhering to 

 many segments of the body, pectinate. 



A. Branchiae not distinct from the cirri. 



* Head covered by the first segment of the body. Jaws nine. 

 Genera Aglaura SAV., (Enone SAV. 



Comp. GUERIN Iconogr. Annel. PI. 6. 



** Head not covered by the first segment of the body. 



Lumbrineris BLAIN., AUD. and EDW. Head obtusely conical, 

 with tentacles either none or two inserted into small tubercles at 

 the posterior margin. Jaws eight. 



Sp. Lumbrineris d'Orbygnii AUD. and EDW. Ann. des Sc. nat. Tom. xxvn. 

 PI. 12, figs. 9 12 ; Lumbrineris pectinifera QUATREP., GUER. Mayas, dt 

 Zool. 1843, Annel. pp. 68, PI. n. figs. 38, &c. 



Lysidice SAV. Head broad, small, with three short tentacles, 

 Jaws seven. 



