UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 13, No. 9, pp. 235-238, 7 figures in text October 12, 1914 



NEW SYLLIDAE FROM SAN FRANCISCO BAY 



COLLECTED BY THE U. S. S. "ALBATROSS" 



BY 

 AAEON L. TEEADWELL 



The two annelids here described were discovered in the collections 

 submitted to me for identification which were inade by the U. S. S. 

 "Albatross" in conjunction with the Survey of San Francisco Bay, 

 made jointly by the United States Bureau of Fisheries and the Uni- 

 versity of California. The paper is published hy permission of the 

 United States Commissioner of Fisheries. 



Trj^anosyllis adamanteus sp. nov. 



Type a sexually mature female of 90 somites. Length 22 milli- 

 meters. Greatest width rather less than 2 millimeters. 



Head (see fig. 1, from cotype), with width about 4 times length. 

 Anterior and posterior edges parallel, the latter a trifle shorter than 

 the former, sides decidedly convex. Palps 1.5 times the length of 

 head, separate to their bases, but closely appressed along their median 

 edges. Eyes, 2 pairs, about equal in size, brown, the posterior with 

 its lens pointing dorsally, the anterior with its lens pointing antero- 

 laterally. Paired tentacles with 9 or 10 joints, extending only to a 

 short distance beyond palps. Median tentacle longer, with 13 joints. 



Somite 1 very short dorsally, much longer ventrally, forming a 

 posterior and 2 lateral lips to the mouth. Tentacular cirri with 9 to 

 12 joints, and much thicker on one side than on the other in the 

 specimen figured. This was probably due to unequal pressure of the 

 cover glass. 



Somite 2 about 4 times as long as 1, widening noticeably from 

 anterior to posterior border. Later somites are still wider, the full 

 width of the animal being reached at about somite 20. 



