138 THE ANNELIDA POLYCHAETA. 



the anterior region the notocirrus has a short but thick cirrophore, with its 

 vertical diameter greater than the horizontal one. Upon this is borne the large 

 foliaceous style, which is subovate in outline with apex obtuse and directed ectad 

 or a little ventrad of ectad. The styles of the neurocirri are smaller. They are 

 shaped much like those of the notocirri, but are relatively narrower and distally 

 more rounded. The neuropodia are cylindrical, distally subconically narrowed 

 processes extending beyond the neurocirri. Each is terminated by a single, 

 long, cirrus-like appendage, at the side of which the aciculum projects. Caudad 

 the style of the notocirrus becomes longer and proportionately much broader. 

 The style of the neurocirrus also becomes larger and more rounded, somewhat 

 widely subreniform, with its longitudinal axis directed ectad. The edges of 

 the styles are frequently irregular, and may be incised or even sublobate. The 

 styles of the notocirri overlap each other and tend also to cover the neuropodia 

 proximally, and often considerably overlap the neurocirri as well. (Plate 24, fig. 

 11; Plate 25, fig. 4-6). 



In each neuropodium there is a single aciculum which is colorless. Proxi- 

 mally it is stout, but narrows to a slenderly acute tip which projects freely a 

 distance about equal in length to the cirriform appendage, at the base of which 

 it emerges. The setae are all transparent. They are of a single type, all being 

 composite. They are long and numerous, forming a large, fan-shaped fascicle. 

 The appendage of each seta is short, distally very fine, and usually more or less 

 curved. (Plate 24, fig. 10; Plate 25, fig. 1). 



The dorsum is light brown, paler on the anterior somites and between the 

 eyes, the latter also paler, excepting the dorsal surface. The specimen from Sta. 

 4727 has a decidedly reddish cast. The venter is yellowish. The parapodia 

 and cirri are lightest, white of a dilute yellow tinge. The segmental glands, 

 showing dorsally at the base of each parapodium as a well-developed lobe and 

 extending down the side caudad of the base of each parapodium, are colored 

 deep purple-brown or almost black, thus forming a conspicuous series of strongly 

 contrasted dark dots along each side as viewed from above. The ventral glands 

 are small and pale. 



Locality. Between the Galapagos and Paumotu Islands: Sta. 4726 (lat. 

 12° 30' S., long. 111° 42' W.). Surface temp. 78° F. 18 January, 1905. Three 

 incomplete specimens, of which only one has the anterior end complete. 



Between the Galapagos and Paumotu Islands : Sta. 4727 (lat. 13° S., long. 

 112° 45' W.). Surface temp. 77° F. 18 January, 1905. Two fragments of a 

 specimen lacking both anterior and caudal ends. 



