788 CALIFORNIA ACADEMY OF SCIENCES. 



Sound in 1880. The extensive collections made by the 

 Albatross in the north have been mostly from much greater 

 depths. 



The plates of the present paper are all drawn by Miss 

 Anna L. Brown, artist of the Hopkins Seaside Labora- 

 tory. 



Family PETROMYZONID^. 



1. Entosphenus tridentatus (Gairdner). 



Common; ascending the fresh waters in spring to 

 spawn, reaching a length of over 2 feet. It is not used 

 as food. Not taken by us. 



2. Lampetra cibaria (Girard). 



Not rare; ascending streams, reaching a length of 8 

 inches; not used as food. Not taken by us. 



Family HEXANCHIDyE. 



3. Notorhynchus maculatus Ayres. 



Recorded (as Notorhynchus borealis) from Nisqually, 

 Washington, by Dr. Gill. Not taken by us. 



4. Hexanchus corinus Jordan & Gilbert. 

 Originally described from Neah Bay and from the Bay 



of Monterey. Not seen by us. 



Family GALEID.F. 



5. Prionace glauca (Linnaeus). Blue Shark. 



Recorded by Jordan & Gilbert; rare. Not seen by 



us. 



Family DALATIID.E. 



6. Somniosus microcephalus (Bloch). Ground Shark. 

 Not uncommon. A very sluggish shark. Recorded 



by Jordan & Gilbert from Victoria. A stuffed specimen 

 from Seattle in the Museum of the Young Naturalists' 

 Society. 



