364 PROCEEDINGS OF THE ACADEMY OF [April, 



eate; when complete the distal thickening tapers into a long tenuous 

 tip armed with conspicuous pectinations. Very few setae possess tnis 

 tip, being broken off just beyond the thickening as shown in figure 

 46 but it is probable that the filament is normally present in all. 



Elytrophores on II, IV, V, VII, IX, XI. XIII, XV, XVII. XIX. 

 XXI, XXIII, XXVI, XXIX and XXXII = 15. All other metas- 

 tomial somites bear notocirri and dorsal tubercles. Elytrophores 

 are situated close to the posterior border of the base of the parapodia 

 and slightly mediad of the alternating notocirrophores. They are 

 very small and little elevated with depressed circular centers. Dorsal 

 tubercles are scarcely noticeable on anterior segments but rather 

 better developed behind the elytrophores region. 



Elytra (PI. XXX, fig. 44) rather firmly attached but so small that 

 they were at first overlooked altogether. They about equal the 

 antero-posterior diameter of the parapodia and because of their 

 posterior position slightly overlap the following foot and leave the 

 anterior portion of the one to which they are attached uncovered. 

 The lateral border reaches the lateral side of the notocirrus and the 

 mediae! border falls far short of the base of the parapodium, the body 

 being of course, entirely uncovered. They are not in the slightest 

 degree imbricated but are separated by a space equal to at least one- 

 half their own diameter. All are rather thick, firm and leathery, 

 circular or nearly so with the circular or elliptical scar close to the 

 anterior border; the cuticle thick and smooth, without trace of 

 surface or marginal cilia or papilla?; the interior finely granular and 

 opake. 



Extended proboscis 4.5 mm. long, 3.5 mm. wide at end; stout, 

 terete at base, somewhat depressed at end; seven blunt bifid papilla 1 

 above and seven below, the lateral pairs of most polynoids wanting. 

 Jaws rather thin, the median sutures obliterated, forming above and 

 below an entire transverse plate of a gray color thickened near middle 

 line by a pair of brown ridges that rise into very small points cor- 

 responding to the fangs of other polynoids. 



No color or pigmentation. 



Station 4,522, Monterey Bay, off Point Pinos Light, 149-130 fathoms, 

 gray sand and shells (type only). 



Next follow the descriptions of four very imperfectly known blind 

 species described from very imperfect material. They are not very 

 closely related but owing to my doubts regarding their generic designa- 

 tion and my hesitation to establish any new genera that more complete 

 knowledge may show to be superfluous all are here provisionally placed 

 in the genus Polynoe. 



