POLYCHAETOUS ANNELIDS FROM PHILIPPINE SEAS. 619 



Parapodia of first three somites lengthened and drawn forward on 

 each side of head. Ehlers (1887) figures two long hooks to each of 

 these parapodia. The Pacific form has an irregular number of hooks 

 extruded. Upon dissection it was found that these parapodia con- 

 tained from 18 to 20 retracted hooks. Most of them were broken. 

 Figure 18 shows the distal end of a complete hook. Dorsal cirri long 

 on first three parapodia, resembling tentacles in form and size. Mod- 

 erately long on fourth; gradually decreasing to tenth. Gills ap- 

 pearing at base of dorsal cirrus on eleventh parapodium as single, 

 heavy, brown process. Ventral cirri reduced to transversely elon- 

 gated elevations on ventral surface of somite. Gills (fig. 16) rapidly 

 increasing to four and five processes. Dorsal cirrus small and sub- 

 ordinated, bearing a small ventral process. 



Acicula of two varieties. Two (fig. 20) light 3 T ellow with blunt 

 termination situated in midst of setae tuft. Varying number of 

 second type (fig. 23) with bi dentate, protected termination, situated 

 ventral to blunt variety. 



Setae of two varieties. Dorsal setae (fig. 21) chisel-shaped. Middle 

 setae (fig. 22) simple capillary, with slight indication of wing. 



Type collected at station D5656, Olang Point, Basa Island, 484 

 fathoms, gray mud bottom, temperature 41.2°. 



There is in the collection a decolorized specimen of this species, 

 which, however, differs from the specimen described in the in- 

 creased number of acicula, which may be as many as five in the an- 

 terior parapodia. The form is 44 mm. in length, incomplete. The re- 

 tractor muscles of the hooks, with hooks attached, may be seen pro- 

 truding for 9 mm. posteriorly, showing that the hooks are 50 mm. 

 long. 



Specimen collected at station D5348, Point Tabonan, Palawan Pas- 

 sage, 375 fathoms, coral and sand bottom, temperature 56.4°. 



Family GLYCERIDAE. 

 Genus GLYCERA Savigny. 



GLYCERA NANA Johnson. 



Glycera nana Johnson (1901) p. 411, pi. 10, fig. 103. 



Very small specimen from San Miguel Harbor, Ticao Island. Sim- 

 ilar but poorly preserved specimen from station D5149, Sirun Island, 

 10 fathoms, coral and shell bottom. 



Fifth setigerous somite similar in lamellae and type of setae, but 

 with ventral setae tuft particularly large. Sixth somite similar to 

 fifth. 



Also collected at station D5209, Taratara Island. 20 fathoms, green 

 mud bottom. 



