1908.] NATURAL SCIENCES OF PHILADELPHIA. 345 



EUNICID^. 

 Eunice kobiensis Mcintosh. 



Eunice kobiensis Mcintosh, Challenger Reports, ZooL, Vol. XII, pp. 278-280. 



Several specimens of Eunice exhibiting considerable variation inter 

 se, but presenting a mean very close to this species originally taken off 

 the coast of Japan, were collected in Alaskan waters. The largest 

 individual is 90 mm. long and 5 mm. wide, being therefore larger than 

 those described by Mcintosh. The maximum raunber of branchial 

 pinnae exhibited by different specimens varies from 5 to 8 according to 

 the size, and the gills begin on V or VI and end at from XLV to LVIII. 

 The characters of the setae and acicula are very constant and differ in 

 no respect from those assigned to Eunice kobiensis. On the other 

 hand the ja^vs vary considerably and the large paired plates may 

 exhibit a number of teeth either greater or less than is shown in 

 Mcintosh's figure. The cephalic appendages generally average shorter 

 and the peristomium longer than on the Japanese specimens, and the 

 ventral cirri are larger than is usual in this genus. 



Stations 4235, vicinity of Yes Bay, Behm Canal, southeastern Alaska, 

 130-193 fathoms, gray mud; 4253, Stephens Passage, Alaska, 131-188 

 fathoms, rock and broken shells; 4272, Afognak Bay, Afognak Island, 

 12-17 fathoms, sticky mud; 4274, Alitak Bay, Kadiak Island, 35-41 

 fathoms, green mud and fine sand; 4289, Uyak Bay, Kadiak Island, 

 74-80 fathoms, gray mud. The last recorded specimen is stated to 

 have come from a "tube 11 inches long, formed of small stones and 

 attached to a slab of slate," 



ONUPHIDiE. 

 Nothria iridescens Johnson. 



Nothria iridescens Johnson, Proc, Bos. Soc. Nat. Hist., XXIX, p. 408. 

 This species was originally described by Johnson from a single 

 specimen lacking the caudal end which was dredged by Prof. Herd- 

 man at Victoria, B. C, It proves to be abundant on muddy bottoms 

 ih the Gulf of Georgia and much less common northward to Prince of 

 Wales Island, southeastern Alaska, The presence of a posterior end 

 permits the completion of Johnson's description. After gradual 

 reduction in length the branchiae are totally wanting from the last 30 

 somites. The pygidium is provided with a thickened circumanal welt, 

 from the ventral side of which arise 4 cirri in a close tuft. The 2 

 median are about ^ longer than the lateral pair and correspondingly 

 stouter. Besides hooded crochets (of which Johnson's figure shows 

 one foreshortened) and capillary setae, posterior segments contain a 



