PHILIPPINE POLYCHAETOUS ANNELIDS 317 



slight surface depression. A smaller acicula extends into the base of 

 the dorsal cirrus (or into the cirrophore of elytra bearing somites). 

 The ventral cirrus reaches about to the end of the setal lobe, tapers 

 gradually to the apex, and has only a very slight basal constriction. 

 The dorsal cirrus is much larger, is flask shaped, and has a broad 

 base. 



Dorsal and ventral to the point of emergence of the large acicula 

 is a row of a few very heavy, j^ellow setae. These (fig. 2, c) have a 

 terminal, somewhat bent tooth, carrying on its convex surface a long 

 slender process densely fringed along its margin. The concave sur- 

 face of the terminal tooth is covered with a dense mass of slender 

 spines. Dorsal and ventral to these setae are two tufts of setae 

 essentially similar in the two cases. They have long, slender shafts, 

 which slightly enlarge toward the ends and then taper to a long 

 slender portion. (Fig. 2, d.) Each side of the terminal portion 

 carries a row of radiating processes. These look like a series of sharp 

 spines but are really thin plates with toothed terminal margins. On 

 the scale of the drawings it is impossible to represent this detail. 

 In the posterior parapods occur heavy, coiled, chitinous rods. 



Holotype. — U.S.N.M. No. 19544, a single incomplete specimen col- 

 lected February 24, 1909. 2 



ONUPHIS BRANCHIATA, new species 



Figure 3 



The Albatross collected three incomplete specimens of this new 

 species of Onuphis at Station D5369, oif Tayabas Light, Marinduque 

 Island (13° 48' N., 121° 43' E.), February 24, 1909, at 106 fathoms, 

 in black sand. The anterior ends were preserved in all cases. One 

 fragment of about 100 somites is taken as the holotype. It is 45 mm. 

 long and nowhere more than 2 mm. in body width. The second 

 somite (first setigerous), the longest of any, is about one-third longer 

 than the first, and those immediately following are progressively 

 shorter. The first 5 somites together are as long as the 12 immedi- 

 ately posterior to them. Throughout the remainder of the body the 

 somites have nearly a uniform width showing only a slight and 

 uniform shortening posteriorly. 



The cirrophores of all tentacles are long, as long as the first somite. 

 Each is ringed for the greater part of its length, leaving a short 

 terminal portion without rings. In the unpaired cirrophore there 

 are six of these rings ; each of the others has eight. The styles of the 



2 On this day the Albatross was engaged off Tayabas Light, Marinduque Island, dredging 

 \n 83 to 159 fathoms, between 8 a. m. and 3 p. m., while at 8 p. m. the dip net and 

 electric light as a lure were used over the side. It is not indicated how this specimen was 

 obtained. Its broken condition would seem to indicate that it had been dredged. 



