1908.] NATURAL SCIENCES OF PHILADELPHIA. 325 



until on the last but one remains. In the several specimens the 

 caudal cirri have from 16 to 25 joints. 



No notopodial aciculum is present, but there are usually 3 neuropodials 

 (/) with knobbed ends of various forms. The neuropodial setae usually 

 number about 10, disposed in 3 or 4 ranks. They are colorless, homo- 

 geneous, and rather milky vitreous in appearance. The rather stout 

 stems have 4 or 5 minute teeth on the convexity of the enlarged ends 

 (d and e) which are strongly oblique and possess a well-developed socket. 

 The appended blades of the dorsalmost setae (d) are quite long, some 

 of those of the anterior segments exceeding by ^ the one figured. The 

 ventral and posterior ones are shorter (e), and some of the shortest are 

 claw-like and little exceed the obliquity of the end of the shaft in 

 length. The end is strongly hooked, the accessory tooth well developeti , 

 and the marginal fringe very fine. 



In one specimen the protruded proboscis is a short and nearly 

 cylindrical cup bearing 10 prominent soft marginal papillse. In 

 another the gizzard lies in somites IX to XXI, in still another in XIX 

 to XXXVII. The cuticle of this species is noticeably thick. No trace 

 whatever of color remains. 



Station 4228 (type), vicinity of Naha Bay, Behm Canal, southeastern 



Alaska, 41-134 fathoms, gravel and sponges; 4235, vicinity of Yes Bay, 



Behm Canal, 130-193 fathoms, gray mud; 4261, Dundas Bay, Ic}^ 



Strait, Alaska, 8-|-10 fathoms, gra}^ mud and rocks. 



Syllis (Chaetosyllis) quaternaria Moore. 



Syllis quaternaria Moore, Proc. Acad. Nat. Sci. Phila., 1906, pp. 352-354 

 (text fig.). 



This epitokous form of the type for which Malmgren established his 

 genus Chcetosyllis is probably a true Syllis, though it cannot be corre- 

 lated with any known non-sexual form. The type and about a score 

 of other specimens are No. 1091 of the Academy's collection. They 

 were taken by A. E. ^Icllhenny at the "surface in a lead four miles 

 from shore" at Point Barrow, Alaska. 



Pionosyllis magnifica Moore. 



Plonosyllis magnifica Moore, Proc. Acad. Nat. Sci. Phila., 1906, pp. 223-225, 

 PI. X, figs. 9-11. 



This large and handsome syllid is represented by two specimens, one 

 (the type) coming from Station 4219, Admiralty Inlet, vicinity of Port 

 Townsend, Washington, 16-26 fathoms, green mud, sand and broken 

 shells; the other from Station 4244, Kasaan Bay, Prince of Wales 

 Island, southeastern Alaska, 50-54 fathoms, green mud. 



Pionosyllis gigantea new species. 



Three fragments of the anterior end, the largest comprising but 40 



