LIST OF PLATES. 



I— II . — Plasmocytes: elements in the blood of Batrachoseps attenu- 



atus Esch. 

 III. — Illustrating life-history of Diemyctylus torosus Esch. 

 IV. — Illustrations of Aphrosylus. 

 V-X. — Illustrations of Pacific Coast Marine Annelids. 

 XI-XII. — Mitstikurina owstoni, gen. et sp. nov. 

 XIII-XVII. — Illustrations of Arachnida from Baja California. 



XVIII. — Illustrations of anatomy of Chelyosoma productum Stimpson. 

 XIX-XX. — Illustrations of North American Gordiacea. 

 XXI. — Illustrations of Metridium fimbriatum Verrill. 

 XXII-XXIV. — Osteological characters of Sebastolobus. 



XXV. — Illustrations of Odonata from Tepic, Mexico. 



DATES OF PUBLICATION OF SEPARATE ARTICLES. 



No. i, April i, 1897; No. 5, Dec. 11, 1897; No. 9, Oct. 12, 1898; 



No. 2, Jan. iS, 1897; No. 6, Jan. iS, 1898; No. 10, Oct. 25, 1898; 



No. 3, April 10, 1897; No. 7, May 28, 1898; No. 11, Dec. 22, 1898; 



No. 4, July 10, 1897; No. 8, Oct. 5, 1898; No. 12, May 22, 1899. 



