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)
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