SABELLIDES AND SERPULIDES l8l 



Honolulu : 



47. Dasychonopsis pallidus sp. nov. 



South Pacific. 

 Australia : 



48. Sptrorbts inversus sp. nov. 



49. Spirorbis tridentatus sp. nov. 



The accompanying heliotype plates are from photographs of 

 the annelids lying under water, that they might appear as life- 

 like as possible, a process developed by Mr. A. H. Verrill, who 

 has also prepared for reproduction most of the camera-lucida 

 drawings of the setae and opercula. 



I am especially indebted to Professor A. E. Verrill and Dr. 

 W. R. Coe, of Yale University, for valuable advice and criti- 

 cism, and to Mr. J. Percy Moore, of the University of Penn- 

 sylvania, for many courtesies, especially the great privilege of 

 studying some of his North Greenland and Japanese forms. 



YALE UNIVERSITY MUSEUM, 

 NEW HAVEN, CONNECTICUT, 

 January, 1904. 



