240 bulletin: museum of compakative zoology. 



oped (Text-tig. 19), the latter extending backward well toward pos- 

 terior end of esophageal region. 



Intestinal caecum^ with pouch-like diverticula, extends nearly to 

 brain. 



Nephridia extend from near brain well back in esophageal region, 

 with one or two pairs of efferent ducts in anterior portion of this 

 region. 



Habitat. — The species is extremely abundant along the whole 

 Alaska coast as far west as Unalaska Island, and Stimpson ('57) 

 records it from Uering Strait. It is found under stones between 

 tides in all sorts of situations. Stimpson 's sjjecimens came from a 

 depth of five fathoms. The species is found on the Atlantic coast 

 of North America from Massachusetts Bay to Greenland (Coe, : 01, 



In addition to the s|)ecimens collected on the Harriman Expedi- 

 tion, the following localities are represented in these collections : — 



1. Sitka, Alaska. 2 specimens of fair size. Griffin, July, '97. 



2. Security Bay, Alaska. 1 specimen. W. H. Jones, Dec, '81. 



3. Belkoff'sky, Alaska Peninsula. Fragments which probably 

 belong to this abundant and widely distributed species. 15-25 fms. 

 W. H. Dall. 



4. Saldovia, Cook Inlet. 2 large specimens, the colors of which 

 are well retained. U. S. F. C. S. Albatross. 



5. Bering Strait, 13 fms. 2 small specimens. 



6. Near Indian Point, Siberia, 17 fms. 1 small specimen. W. 

 H. Dall. 



7. Plover Bay, Siberia, 10-25 fms. 2 rather small specimens. 

 W. H. Dall. 



8. Same locahty and collector, 10-25 fms. 2 medium sized 

 specimens. 



9. "Alaska" U. S. R. S. Corwin, 1884. 



10. Copper Island, Commander group (off Kamchatka), L. Stej- 

 neger, 1897; 5 small specimens which I could not distinguish from 

 this species. 



11. Griffin ('98, p. 212) records the species with a query from 

 Sitka. 



12. Bering Sea, near Unalaska Island (Sta. 3311, 53° 59' N. Lat., 

 166° 29' W. Long.), 85 fms., green mud, U. S. F. C. S. Albatross^ 

 1890. 



