NERBIDIFORMIA. 



479 



Fam. 6. Phyllodocidae. Body elongated, with numerous segments ; presto- 

 mium rounded with 4 or 5 tentacles ; peristomium with 4 tentacular cirri ; the 

 cirri of the parapodia are foliaceous. 



Sub-fam. 1. Phyllodocinae. With small eyes. Phyllodoce Sav. (Fig. 



388), with 4 tentacles; Enlalia Sav., with 5 tentacles; Eteone Sav.; Anaitis 



Mgr. ; Genethyllis Mgr. ; Mystides Theel ; Notophyllum Oerst. ; Lacydonia 



Mar. and Bob. 



Sub-fam. 2. Lopadorhynchinae. Small transparent pelagic forms with 



small eyes ; intermediate between Phyllodocinae and Alciopinae. Lopado- 



rhynchus Gr. ; Hydrophanes Clp. ; Pelagobia Grf. 



Sub-fam. 3. Alciopinae.* Transparent, pelagic worms with one pair of 



large hemispherical projecting eyes (Fig. 389). There are long peristomial 



cirri and 5 prestomial tentacles. Found 



in most oceans, but rare in the North 



Sea. The larvae are in part parasitic 



in Cydippidae. Alciopa And. and Edw. ; 



Alciopina Clp. and Pane.; Astcrope Clp.; 



Vanadis Clp. (Fig. 389) ; Halodora Grf. ; 



Greefia (N(tuphantn) M'Int. ; Callizona 



Grf. ; Rhynclwnereella A. Costa. 

 Fam. 7. Tomopteridae.f Transparent, 

 pelagic forms, with two eyes, bifid presto- 

 rniuiii (the lobes of the prestomium may 

 be tentacles ; their cavity is continuous with 

 the body-cavity), and four tentacular cirri, 

 of which the posterior are much the longest 

 and contain one seta, while the anterior 

 contain two setae. The mouth is with- 

 out proboscis and jaws. The parapodia are 

 large, biramous, and without setae ; each 



branch contains a yellow rosette-shaped organ, probably photogenic. Tomopteris 

 Eschsch. (Fig. 390). 



Fam. 8. Nereidae (Lycoridae). Body elongated, with many segments. Pre- 

 stomium with two tentacles, two palps and four eyes ; peristomium with four 

 pairs of tentacular cirri. Parapodia uni- or biramous with dorsal and ventral cirri 

 and composite setae. Proboscis usually with spines, and always with two jaws. 

 Nereis L. ; N. divcrsicolor Mull., burrows in mud and sand, fleshy red colour ; 

 N. cultrifcra Gr. , greenish grey, with small rectangular light spots along the 

 dorsal surface ; 6 inches. N. dumerilii Aud. and Edw. (Figs. 391, 392), reddish 

 violet with darker transverse lines in each segment ; peristomial cirri very long. 

 N. pelagica L., bronze, large, widest in middle of body, back arched, on rocky 

 ground. N. (Nereilcpas) fmata Sav., lives on whelk shells. N. (Alitta) virens 

 Sars the creeper may reach length of 18 inches, burrows in clay, etc., para- 

 podia with large foliaceous lobes. Lycastis Sav. ; Dendronereis Peters. 



Fam. 9. Nephthydidae. Body elongated, quadrangular in section with flat 

 dorsal and ventral surfaces. Prestomium inconspicuous, with 2 or 4 small 

 tentacles. Peristomium with reduced parapodia bearing setae and two tentacular 

 cirri. Parapodia biramous ; the two branches are widely separated, and each 



The notopodium has a curved gill on its under 



FIG. 389. Head and anterior end of 

 Vanadis melanoplithalmus Greed" 

 (after Greeff). Showing the large 

 eyes. 



is fringed with a membrane. 



* R. Greeff, Nova Ada Acad. Car. Leap., 29, 1876, p. 35. 

 t R. Greeff, Zcit. f. wiss. ZooL, 42, 1885, p. 432. 



