[ <; ] 



22. A partial comparison of the Conchology of por- 

 tions of the Athmtic and Pacific Coasts of North 

 America. 



Proceed. Cal. Acad. Sciences, October 7, 1S72. 



[Numbers 18, 19, 20, 21 and 22 included in " Couchological Memoranda, 

 No. X," 7 pages and plate.] 



23, On the Economic Value of certain Australian 

 Forest Trees, and their cultivation in California. 



Proceed. Cal. Acad. Sciences, July 1, 1872. 



[Also in "Calitornia Horticulturist," Vol. II, and elsewhere; and sep- 

 arately in pamphlet, 11 pp. 8vo.] 



24. The California Trivia and some points in its 

 Distribution, 



American Naturalist, Vol. VI, December, 1872, with figures. 



25, Descriptions of a New Genus and two new spe- 

 cies of Nudibranchiate Mollusks from the Coast of 

 California, 



Proceed. Cal. Acad. Sciences, April 7, 1873, with illustrations. 



2G. Descriptions of New Marine Mollusks from the 

 West Coast of North America. 



Proceed. Cal. Acad. Sciences, April 7, 1873, with plate. 



[Numbers 25 and 26, also separately as " Conchological Memoranda, No. 

 XII. Preliminary descriptions of most of the species described in No. 26 

 were printed and distributed in "Conchological Memoi'anda, No. VII," Au- 

 gust 28, 1871 ] 



27. The Pectens, or Scallop Shells. 



Overland Monthly (California), April, 1873. 



[As referred to in History and Poetry; also remarks on their Anatomy.] 



28. On Xylophagous Marine Animals. 



California Horticulturist, etc.. May, 1873, with figures. 



