ALPHABETICAL INDEX. 



t I 



N. 



PAGE 



Natural selection 20 



Neo-Darwiuism xii, 11,51 



Neo-Darwiuismand Neo-Lamarckisni . xii, n 



Neo-Ivamarckism xii, 11, 53 



Nomenclature, notes on xi 



North America, historical review of 

 faunal and floral divisions proposed for . vii 



Notes on nomenclature xi 



Notes on the genus Phylloxera, new . . . xi 



Notes on parasites xvii, x\nii 



Notes, paleontological. from the north- 

 west coast X 



Nurture vs. Nature 33 



o. 



odor of flowers in attracting insects . . xiv 



Officers for 1891 xii 



Orban, Alexis, election of x 



Ordovician strata, discovery of vertebrate 



life in xiii 



Organisms in St, Peter's sandstone . . . . ix 



Organisms, problematic x 



Origin of variation . . . . : 1,4 



Osborn, H. F 2,61,62 



Osborn, H. F. — Review of the discovery 

 of cretaceous mammals xiii 



P. 



Packard, A. S 53 



Paleontological notes from the northwest 



coast x 



Paleopathology, notes on xvii 



Paleozoic genera, variation in vii 



Palmer, T. S. — Some early views of the 

 geographical distribution of species . viii 

 The winter aspects of the Mohave Des- 

 ert region xviii 



Palmer, Wm. — The occurrence of the 

 Asiatic cuckoo on the Pribylov 



Islands xi 



The distribution of certain mammals, 

 birds and plants on the Pribylov 



Islands xvi 



The fate of the fur seal in .\merican 



waters xvii 



Palms, date, recent introduction of ... . xv 



Pangenesis 26 | 



Panmixia 52 ! 



Parasites, notes on .xvii, xviii 



Parasites of live stock, practical value of 



investigating xv 



Parrakeet, Carolina, monograph of . . . . xv 



P.\GE 



Peace Creek bone beds in P'lorida. age of xiv 

 Pelecypods, development of hinge in . . . 8. 9 



Perigenesis of the plastidule 29 



Pfliiger . 25 



Phylloxera, new notes on xi 



Physiological selection . . 52 



Physiological units 26 



Plant diseases, recent progress in the 



study of xvi 



Plants, distribution of, on the Pribylov 



Islands xvi 



Plants, food, of the Indians of the Death 



Vallej- region xvii 



Plants, Potomac fossil, recent discoveries 



of xix 



Plants, some F'lorida xv 



Plastidule, perigenesis of the 29 



Possibility of variation not equal in every 



direction ." 5 



Poulton, Edward B 34 



Prairie dogs, remarks on the affinities of xix 

 Prentiss, D. W. — Change in the color of 

 human hair ; change in the color of 

 plumage of birds, and in the fur of 



mammals vi 



Pribylov Islands, the distribution of cer- 

 tain mammals, birds and plants on the xvi 

 Pribylov Islands, the occurrence of the 



Asiatic cuckoo on the xi 



Propagation, vegetative, of Dicentra 

 cuciiUaria x 



R, 



Rabbit, a new, from Snake Plains, Idaho, 



Lfpus idahoensis xi 



Radiolario, Haeckel's, of the Challenger 



expedition xviii 



Relations of conscious eflfort 3 



Review, historical, of faunal and floral 



divisions proposed for North America . vii 

 Re%nsio Generum Plantarum, review of 



Kuntze's xix 



Reyburn, Robert.— The life history of 

 micro-organisirs with its relation to 



the theory of evolution viii 



Ricardo 65 



Richardson, C. \V., election of vii 



Riley, C. V. — Colors of insects vii 



New notes on the genus Phylloxera . . . xi 

 The Mexican arrow weed and jumping 



bean xvi 



Romanes. G. J 10, 51, 52 



Roome, E., election of v 



Rose, J N. — Coulterella. a new genus of 

 Compo-sitje ix 



