POLYCHAETOUS ANNELIDS FROM PHILIPPINE SEAS. 595 



Family NEREIDAE. 



The collection contained large numbers of heteronereis stages of 

 Nereis. , Since during this phase the bodily changes are such as to 

 obscure specific characters I have relied almost entirely in determin- 

 ing species on the characters of the jaws and paragnaths. These 

 determinations must therefore be regarded as provisional. 



Genus NEREIS Linnaeus. 



NEREIS MASOLOCENSIS Grube. 



Nereis masolocensis Geube, 187S, p. 75, pi. 5, fig. 4. 



The Albatross specimens corresponded exactly with these in re- 

 spect to tooth structure. Grube states that 22 anterior somites are 

 marked with a brown stripe on either side. In these not more than 

 17 or 18 were so marked. A prominent feature is a brown band 

 across the entire dorsal surface of the second setigerous somite. 



Collected at Bohuao; Varadero Harbor, Mindoro; Subic; Tava 

 Island ; San Miguel Harbor ; Varadero Bay, Mindoro ; " Electric 

 light, July 20, 1908," station D5403, Capitancillo Island, between 

 Leyte and Cebu, 182 fathoms, green mud bottom. 



NEREIS PECTINIFERA Grube. 



Nereis pectinifera Grube, 1S78, p. 66, pi. 4, fig. 5 ; pi. 5, fig. 5. 

 Collected at Labuan Blanda Island. 



NEREIS TONGATABUENSIS Mcintosh. 



Nereis iongatabuensis McIntosh, 1885, p. 212, pi. 34, figs. 7, 8, 9 ; pi. 16a, 

 figs. 5. 6, 7. 



Collected at Nasugbu Luzon. 



NEREIS (PLATYNEREIS) INTEGER, new species. 



An epitokous form, characterized by an enormous development of 

 the prostomium, so that the antennae are thrown to the ventral sur- 

 face, all that is visible from above being the enormous eyes and the 

 shovel-shaped prostomium (figs. 1 and 2). 



Male. — The prostomium rounded, its margin entire, the portion 

 anterior to the eyes being very thin and translucent. In some indi- 

 viduals the palps may be seen through this translucent region. The 

 anterior eyes are the larger, and they are situated on the latero- 

 ventral portion of the head. 



The dorsal tentacular cirrus (lost in the specimen figured) ex- 

 tended in other specimens to the eighth somite. The median cirri- 

 (fig. 1) are much shorter. 



On the ventral surface (fig. 2) appear the flattened antennae, 

 which normally hang at right angles to the prostomium, but are 



