POLYNOE INNATANS. 71 



Parapodia shorter than the somite to which attached, decreasing in length 

 cephalad and caudad. A typical parapodium is deep dorsoventrally at the base 

 and outward to the low, stout notopodial process which is distad of the middle; 

 the neuropodium beyond the notopodial elevation narrows subconically; distally 

 it is obliquely subtruncate and is extended above into a short, slender, finger-like 

 process. The dorsal cirrophore is a stout, subcorneal joint arising just proximad 

 of the middle; no styles were found in the type, all appearing to have been lost. 

 The ventral cirri are attached toward the distal end close to the setae; the cirro- 

 phore is a thick, rounded lobe; the style is smaller at the base, then conspicuously 

 and continuously narrowing to the slender tip ; extending well beyond the distal 

 end of the neuropodium but not reaching the tips of the setae. Ventral cirrus 

 of the first metastomial parapodia attached farther toward the base, much longer 

 than the others, and attaining or nearly attaining the distal ends of the setae. 



Most of the elytra are missing from the type. Those present are thin and 

 transparent. They extend outward on the parapodia as far as the notopodia, 

 the setae of which extend from beneath the outer edge of the elytra. Elytra 

 well overlapping both mesally and anterocaudally. The elytra are subcircular, 

 with two or more weak notches on the exterior side opposite the notopodial 

 fasciae. The exterior and anterior parts of the elytra are nearly uniformly 

 covered with numerous, small, low tubercles each of which has a somewhat 

 hemispherical basal portion and an abruptly narrower short, conical, apical por- 

 tion which is commonly bent toward one side. 



The acicula are colorless. The notopodial is stouter than the* neuropodial, 

 but slightly curved, its acute apex protruding among the setae. The neuropodial 

 typically presents a more distinct and double curve; its acute distal portion 

 extends through the finger-like process of the neuropodium. The notopodial 

 setae are arranged in a whorl on the distal end of the notopodium; they are 

 typically ten to twelve in number; there are two principal types, a posterior 

 group of larger, weakly and evenly curved setae, and an anterior group of smaller 

 ones most of which are abruptly bent at the beginning of the pectinate distal 

 division and are much the widest in the region of the head and somewhat boom- 

 erang-shaped. The notopodials of the first type have over the distal portion 

 along the convex edge a series of mostly near eight scales which are widely 

 separated; the tip is distinctly bifid, but is frequently broken off. (Plate 8, 

 fig. 2). Those of the second type have along the convex edge distad of the 

 bend a series of mostly near twelve more closely arranged scales; the tip weakly 

 bifid. (Plate 8, fig. 1). The neuropodial setae are much naore numerous, 



