PHILIPPINE POLYCHAETOUS ANNELIDS 



315 



number of other polynoids. 1 Viewed from the end, the parapodium 

 has an oval outline, the posterior and anterior lips of the setal lobe 

 being equal in length, the former continuous, the latter broken in the 

 middle. The sixteenth parapodium with its elytrophore is shown in 

 Figure 1, b. A heavy acicula reaches the surface near the middle of 

 the parapodium. Dorsal to this is a tuft of very long, sharp-pointed 

 setae carrying a fringe of fine hairs along one margin. Ventral to 

 these are smaller ones of several kinds. (Fig. 1, <?, d, e.) Neuro- 

 podial setae are sharp-pointed with lateral hairs along both margins. 

 (Fig. 1, /.) Anterior to the above-described setae, extending above 



Figure 2. — Iphionella elongata, new species : a„ 

 Head, X 10 ; b, parapodium, X 17% ; c, heavy 

 seta, X 68 ; d, seta, X 185 



ftnd below the acicula, is a row of much heavier ones, blunt-pointed 

 at the apex, with terminal and subterminal bunches of stiff spines. 



(Fig. 1, g.) In more posterior somites the setal row is much shorter. 



Holotype. — U.S.N.M. No. 19543, a single imperfect specimen 



collected at Station D53G9, off Tayabas Light, Marinduque Island 



(13° 48' N. } 121° 43' E.), February 24, 1909, 106 fathoms, black sand. 



IPHIONELLA ELONGATA, new species 



Figure 2 



The single specimen retains about 50 of the anterior somites. In 

 its widest portion, 13 mm. back from the head, it is 9 mm. wide, and 



1 Treadwell, A. L., Acoetes magniflcaj Amer. Mus. Nov., No. 355, June 1, 1929. 



