302 THE AMERICAN NATURALIST. [Vor. XXXVI. 
A pair of ventral nerve cords (Fig. 6, n.c.) are conspicuous 
in transverse sections, in which the cut ends of the nerve fibers 
appear, surrounded at intervals by a few darkly stained bodies, 
the nuclei of ganglionic cells. The ganglia, one to each seg- 
ment, can be plainly seen in a zooid cleared with glycerine. 
The nerve cords, although in direct contact with the epidermis, 
are plainly not fused with it. 
No head or eyes were detected; but as these structures are 
obviously present in the zooids of the closely allied Trypano- 
syllis gemmipara, failure to find them in the present species is 
almost certainly due to the broken condition of the material, 
the tips of the buds being especially liable to injury. 
The place of origin of the buds is near the posterior extrem- 
ity of the stock. Probably, as in 7. gemmipara, it is about the 
length of a zooid, or twenty somites, in front of the pygidium. 
The proliferating region, although now destitute of buds, has 
been sectioned, and shows merely a mass of undifferentiated 
tissue pervaded by a radiating system of muscle fibers, which, 
in all probability, passed into the zooids, as they certainly do in 
T. gemmipara. 
The rudimentary and apparently functionless condition of 
the alimentary canalis noteworthy. Although impossible, from 
the defective material, to tell whether a mouth and anus are 
really absent, it is highly probable that they are. 
Trypanosyllis gemmipara. 
The other species with collateral buds was found in a collec- 
tion of Polychaeta gathered in Puget Sound and vicinity by 
Nathan R. Harrington, since deceased, member of the expedi- 
tion sent out by Columbia University in the summer of 1896. 
It has been described and figured in the writer's report! on the 
Polychzta of that expedition under the name Trypanosyllis 
gemmipara. | 
Although much smaller than the preceding, 7. gemmipara is 
nevertheless very large for a syllid. The Puget Sound speci- 
men measures 68 mm. in length and 3 mm. in width. Like 
1 Johnson, H. P. The Polychata of the Puget Sound Region, Proc. Boston 
Soc. Nat. Hist., vol. xxix (1901), No. 18, p. 405, Figs. 72-76. 
