608 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



NEREIS ZONATA Malmgren. 



Neries zonata Mai/mrgen, Fauvel (1914), p. 177, pi. 14, figs. 1-17. 

 Epitokous form with paragnaths coalesced. 



Collected at station D5149, Siruii Island, 10 fathoms, coral and 

 shell bottom. 



NEREIS (LEPTONEREIS) INERMIS, new species. 



Plate 47, figs. 8-12. 



Type.— Cat. No. 18947, U.S.N.M. An incomplete specimen of 30 

 somites. Length, 16 mm.; greatest width, just behind head. 5 mm. 



Head (fig. 8) 6-angled, with length equal to greatest width. Palps 

 more than twice as long as head, with ends distorted and unequal 

 because of poor preservation. Tentacles extending three-fourths of 

 length of palps, borne on anteriorly directed lobes of head. Tenta- 

 cular cirri, four pairs, the longest extending posteriorly as far as the 

 twelfth setigerous somite. Eyes, four pairs, all provided with lenses, 

 situated in the posterior region of the head. Anterior pair larger 

 with louses directed antero-laterally ; posterior pair nearer the mid 

 line, with lenses directed dorsally. Proboscis without armature of 

 any kind. 



Parapodia varying slightly, the change being gradual antero- 

 posterior^-. Typical anterior parapodium (fig. 9) divided into noto 

 and neuro podia. Notopodium divided into two lobes, the acicula 

 being in the ventral one. Dorsal cirrus arising median to base of 

 dorsal lobe and extending beyond it. Neuropodium divided into 

 two lobes, the dorsal of which is subdivided for a short distance, and 

 contains acicula. Ventral cirrus short, and arising medianly and 

 ventrally to ventral lobe. Posterior parapodium (fig. 10) with same 

 parts. Dorsal cirrus greatly elongated. Dorsal lobe of notopodium 

 shortened. Ventral lobe greatly increased. Ventral cirrus elon- 

 gated. 



Setae from anterior parapodium of setose variet}'. First variety, 

 setose seta (fig. 11) occurring in dorsal and ventral bundles. Blade 

 finely serrated. Second variety, setose setae (fig. 12) occurring in 

 ventral bundle. Blade finely but deeply serrated. Setae of posterior 

 parapodia essentially the same as to form, but more slender. 



Collected at station D5346, Cliff Island, 7 fathoms, mud bottom. 



NEREIS (HETERONEREIS) CAERULEIS, new species. 



Plate 47, figs. 13-16; plate 48, figs. 1-4. 



Type.— Cut. No. 18948. U.S.N.M. Specimen, 90 mm. in length, 

 incomplete posteriorly. Greatest width. 10 mm. Number of so- 



