348 



EUNICIDAE. 



One dorsal cirrus and 

 one ventral cirrus 



He discusses the supposed jaws of Eunicidae found by Dr. Hmde in the Silurian 

 strata, and points out that no mandibles have been described. He mentions the Rotifera 

 as having similar structures. He also adheres to his former classification of the Eunicidae 

 as a whole. 



Grravier 1 classifies the Eunicea as follows : — 



Eunices — three tribes. 

 ' Superior jaw formed of pieces, few in number 

 (generally three) 

 Superior jaw formed of small pieces (teeth), 

 numerous, and arranged longitudinally . 

 No ventral cirrus . Dorsal cirrus rudimentary or foliaceous 



Grravier again divides Eunice into— 

 No branchiae . . 



f Reduced to one filament more or less divided 



' 1 Arborescent or pectiniform 



[ Seven antennae ; no tentacular cirri, branchiae 



cirriform .... 



Less than seven antennae; with tentacular 



cirri .... 



Five antennae 



With branchiae 



With branchiae 



Eunicidae. 



Staurocephaliclae. 

 Lumbriconereidae. 



Nicidon. 

 S.-g. Eriphyle. 



S.-g. Leodice. 



Hyalince'cia. 



No tentacular cirri - 



Eunice. 



Marphysa (Nau- 



phanta, Nausicsea, 



Macduffia). 

 Ampl dro. 



Nicidon. 

 Lysidice. 



Nematonereis. 



Three antennae 



' With tentacular cirri : Five antennae 

 No branchiae . . Without „ ,, Three antennae 



„ ,, ,, One antenna 



Instead of giving numbers to the parts of the dental apparatus it has been thought 

 more simple to give names. 



Metatrachophore and Nectochaete larvae of Eunicidae from Naples have been described 

 by Hiicker, 2 the former having two eyes and two pairs of bristle-bundles, the latter four 

 eyes and three pairs of bristle-bundles. He finds the Eunicid larvae generally have a 

 two-ringed prototroch. In the Plankton Expedition 3 he met with another Nectochaete 

 stage with two bristle-bearing feet on each side. 



Though, so far as known, no British Eunicid is phosphorescent, Mr. Cyril Crossland 

 found that many foreign species exhibit it when killed in the dark. " The phenomenon 

 is especially well shown, under the influence of mechanical stimulus, and in dim light, by 

 Eunice afra, Peters, at Suez. The animal is strongly phosphorescent during removal 

 from the mud, blue light being given out from points just below each parapodium (mucus- 

 secreting pads of the ventral cirri), and a considerable amount of mucus is secreted at the 

 same time, and this remains luminous." He mentions also that Mr. Stanley Gardiner 



1 C. Grravier, ' Nouv. Arch. Museum/ Paris, 4 ser., t. iii, p. 217, 1900. 



2 'Zeitschr. f. wiss. Zoo!./ Bd. lxii, p. 78, 1896. 



3 'Die pelagischen Polychast./ etc., p. 9, Taf. 1, fig. 2, 1898. 



