4 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



14. A small collection, accompanied with notes on coloration, 

 made by Mr. A. J. Carlson of Stanford University at Pacific (xrove, 

 Cal. 



15. Several specimens collected in Puget Sound by Prof. Trevor 

 Kincaid of the University of Washington. 



16. Since this report was first completed, in June, 1903, I have 

 received the collection of neinerteans made by the U. S. Fish Com- 

 mission Steamer Albatross in connection with the Alaska salmon 

 investigations of 1903. The data obtained from a stud}' of this col- 

 lection are now incorporated in the j)resent report. 



It should be added that the above include all the nemerteans from 

 the West Coast of North America contaijied in the U. S. National 

 Museum. These, together with Mi-. Grifiin's collections, were first 

 placed in the hands of Dr. W. McM. Woodworth of the Museum of 

 Comparative Zoology, Harvard College, and by him were turned 

 over to me. 



The type specimens of many of the species described below are 

 from my personal collections and are to be deposited in the Yale 

 Museum. Cotypes of most of these species are to be found in the 

 Museum of Comparative Zoology. Other types are the property of 

 the United States National Museum, where, as far as the material 

 will allow, a duplicate set of specimens of all species will he sent. 



General Charatters of the Nemerteans. 



Proboscis. — The most characteristic feature distinguishing the 

 nemerteans from all other groups of worms is the possession of a 

 highly developed, tubular, eversible proboscis, situated dorsal to the 

 alimentary canal, bathed in acorpusculated fluid enclosed in a special 

 muscular sheath, and opening at the anterior end of the body, some- 

 times in connection with the mouth and sometimes separately. In 

 many species the proboscis is nearly as long as the body itself ; it is 

 lined with glandular epithelium, and in certain geneni is proA'ided 

 with rhabdites, nematocysts or highly specialized calcareous stylets of 

 definite size and shape. 



Form and size. — The body of the nemertean is commonly long, 

 flattened, and ribbon-like (Cerebratulus), filiform (Cephalothrix, 

 LiNEUs), broad and flat (Drepanophorus), thick and rounded (Er- 

 borlasia), or short and cylindrical (Tetrastejima), but in nearly 



