114 ^°^ 



number of species which were not collected on the Harriman 

 Expedition, and a large proportion of which have proved to be 

 new to science. 



A study of the Nemerteans of the California coast reveals the 

 fact that a number of the Alaska species extend southward 

 throughout the whole length of the State, and that many others 

 occur as far south as Monterey Bay. We may thus expect that 

 many of those forms w^hich I have more recently found in Cali- 

 fornia may range northward into Alaska, so that their incor- 

 poration in the report on the Alaska species can by no means 

 be out of place. 



In the following pages I shall not attempt to describe all the 

 species which have come into my hands from the Pacific coast, 

 but shall here confine myself to those forms which I had an op- 

 portunity of collecting personally and studying while they were 

 still alive. The specific descriptions can thus be made far more 

 precise and exhaustive than when preserved material only is to 

 be had. In all cases, however, serial sections have been care- 

 fully studied to determine the anatomical peculiarities of each 

 species recorded. 



The most strikingly colored forms were drawn as nearly as 

 possible in their natural colors, and an attempt was made to re- 

 produce the natural shape and characteristic position of the body 

 when alive. 



A single species (A. -patilinus) has been described by Pun- 

 nett^ from the Pribilof Islands, Bering Sea, since the first por- 

 tion of this report appeared. A brief description of this species 

 will be found on p. 155. 



At the time of publishing the first portion of the report, I was 

 unfortunately unaware that a preliminary paper by the late B. 

 B. Grifiin on Some Marine Nemerteans of Puget Sound and 

 Alaska^ had appeared since the death of this enthusiastic young 

 investigator. Several of the species very briefly described by 

 Griffin were through this oversight redescribed by me in my 

 previous paper with names which must be now relegated to syn- 

 onymy. Griffin's drawings, notes, and collections have recently 



' Proc. Zool. Soc. London, p. 92, 1901. 



*Ann. New York Acad. Sci., xi, pp. 193-217, 1898. 



