VOL. XVIII, PP. 35-54 FEBRUARY 2, 1905 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



i 



A PRELIMINARY ACCOUNT OF THE DORIDID^ OF 

 MONTEREY BAY, CALIFORNIA. 



BY F. M. MACFARLAND. 



By permission of Hon. George M. Bovvers, U. S. Commissioner of Fish and Fisheries. 



For a number of years past the writer has been engaged upon 

 a study of the Opisthobranch Mollusca of Monterey Bay and 

 the adjacent sea coast, the results of which will soon appear in a 

 series of systematic and morphological papers upon the families 

 represented, fully illustrated by colored plates and drawings. 

 The present article is intended to serve merely as a preliminary 

 list of the species of the Dorididse found, with sufficient data to 

 render their recognition easy by other students of the group. 

 While occupying the Smithsonian table at the Naples Zoological 

 Station during the months from November to April, 1902-03, 

 I enjoyed the opportunity of studying a large number of Medi 

 terranean Dorididse for purposes of comparison with Pacific 

 forms. My sincere acknowledgments are due to Professors 

 Dohrn, Eisig and Mayer, and to Dr. Lo Bianco and to their able 

 assistants for the many kindnesses shown to me while there. 

 To the directors of the Hopkins Seaside Laboratory, Pacific 

 Grove, California, Professors Jenkins and Gilbert, I would 

 express my gratitude for the facilities afforded me and for the 

 unfailing kindly interest which they have shown in my work. 



The collections upon which the present paper is based have 



7 PROC. BIOL. Soc. WASH., VOL. XVIII, 1905. (35) 



