INDEX. 



Abutilou aurantiacura, 357. 



Berlaiulieri, Gray, 358. 



Lemmoui, 357. 



Parishii, 357. 



Wright ii, 357. 

 Acalvpha mollis, IIBK., 373. 



Priuglei, 373. 



vagans, 373. 

 Aceratcs bifida, Rusby, 29G. 

 J]]cieliuni columuare, 322. 



pseudo-columiiare, 322. 

 Air, upper, on obtaining the electric 



potential of the, 459. 

 Aluminum, on the separation of tita- 

 nium and, Avitli a note on the 

 separation of titanium and iron, 

 435. 

 Angelica Dawsoni, 3G9. 

 Anoplocaryum, Ledeb., 261. 

 Anthracene filter, 391, 392. 

 Anthracomarti, Karscli, 13, 14, 15. 

 Anthracomartus, Karsch, 14, 17. 



Krejcii, 17. 



pustulatus, 18. 



trilobitus, 17. 



Volkeliauus, Karscli, 14, 17. 

 Antiphytum, 2G5. 

 Antirrhinum subcordatum, 30G. 

 Aphyllon Cooperi, 307. 

 Aplopappus Orcuttii, 297. 

 Apparatus, self-recording, 453. 

 Arabis retrofracta, 353. 



subpinnatifida, 353. 

 Arachnida, paleozoic, a contribution 



to our knowledge of, 13. 

 Aranese, 13, 22. 

 Architarboida3, Karscli, 14, 16. 

 Architarbus, Scudder, 14, 17. 



rotundatus, Scudder, 14, 17. 



silcsiacus, Roemer, 14, 17. 



subovalis, Woodward, 14, 17. 



Arenaria Howellii, 354. 

 Aristolochia subclausa, 372. 

 Arizona, California, and their Mexi- 

 can borders, new genera of, 

 and two additional Asclepia- 

 daceai, 290. 

 Arthrolycosa, Harger, 15. 

 antiqua, Harger, 15. 

 Artlirolycosidffi, Harger, 15. 

 Asbestos filter, 390. 

 Asclepiadacea3, two additional gen- 

 era of, 290, 294, 295. 

 Astacus Colchicus, 158. 

 Dauricus, 151. 

 fluviatilis, 155. 

 Gambelii, 152. 

 Japouicus, 149. 

 Klamatheusis, 151. 

 leniusculus, 151. 

 leptodactylus, 157. 

 nigrescens, 152. 

 pachypus, 158. 

 pallipes, 154. 

 Schrenckii, 151. 

 torrentium, 153. 

 Trowbridgii, 152. 

 Astacus and Cambarus, descriptions 

 of new species of, to which is 

 added a synonymical list of the 

 known species, 107. 

 Astacus, list of the known species of 



Cambarus and, 135. 

 Astragalus acntirostris, 3G0. 

 castaneaeformis, 3G1. 

 Congdoni, 3G0. 

 fallax, 3G2. 

 ■ Tendleri, 3G2. 

 graeilentus, 363. 

 Greenei, Gray, 363. 

 Mohavensis, 361. 

 Orcuttianus, 361. 

 procumbcns, 361. 

 troglodytus, 362. 



