coe: nemerteans of west and northwest coasts. 201 



It is very abundantly represented in the collections at hand, hav- 

 ing been dre Iged at the following localities : — 



1. Port Angeles, Washington. One specimen apparently of this 

 species collected by the Albatross, 1891. 



2. Near Kadiak Island, Alaska. Collected by the Albatross (Sta. 

 2855, 57° N. Lat., 153° 18' W. Long.) in 69 fms. Bottom green 

 mud ; temp. 44° F, 



3. South of Alaska Peninsula. Collected by the Albatross (Sta. 

 3216, 54° 20' N. Lat., 163° 37' W. Long.) in 61 fms. Bottom black 

 sand and mud; temp. 38.5° F. A number of very large specimens 

 some of which may have been 3 meters in length when alive, and 

 now measure 17 ram. in width and 15 mm. in thickness in esophageal 

 region. 



4. Unalaska Island, Alaska. One specimen collected by the 

 Albatross. 



5. Agattu Island (52° 30' N. Lat., 173° 30' E. Long.), Aleutian 

 Group. One specimen of medium size collected by the Albatross. 



6. Bering Sea. Several large specimens collected by the Alba- 

 tross (Sta. 3311, 53° 59' N. Lat., 166° 29' W. Long.) in 85 fms. 

 15ottora green mud ; temp. 41° F. 



7. Bering Sea. Two medium sized specimens collected by the 

 Albatross (Sta. 3289, 56° 44' N. Lat., 159° 16' W. Long.) in 16 fms. 

 Bottom black sand. 



8. Plover Bay, Siberia (near Bering Strait). A single large 

 specimen dredged by Mr. Bailey in 6 fms. 



The present known range of this species is therefore from Puget 

 Sound, along the Pacific coast of Alaska and the Aleutian Islands, 

 through the Bering Sea to the vicinity of Bering Strait, a distance 

 of more than 3000 miles. Its geographical distribution is thus from 

 about 125° W. Long, to 173° E. Long., and from about 48° to 64.5° 

 N. Lat. 



39. Cerebratulus calif orniensis, sp. nov. 



Body of form most characteristic of genus, rounded in esophageal 

 region, much tlattened and with very thin margins in intestinal 

 region. Head of variable shape, as in many species of genus, com- 

 monly pear shaped or broad lanceolate, pointed anteriorly and con- 

 stricted just back of brain, so that in ordinary states of contraction 



