448 



INDEX. 



Pottia, 213 



" Poiirquoi-pas ? " Expedition of the, 214 



Powell and Lealand, 414 



Powell, Hugh, 413, 414 



Praeger, 11. Llo}'^d. Irish Fungi, 83 



Prashad, Baini, 187, 384 



Pratt, O. A., Storage-rot in Potatoes, 224 



Presidential Address, 153 



Prioenemis variabilis, 47 



Pritchard, Dr. Urban. Donation of Diatom 



Slides, 410 

 Pro-cestrum, 35 

 Protozoa of Lahore, 391 

 Protula meilhaci, Segmentation of Ovum of. 



58 

 Psathyrometra, 38G 

 Pseud idotheidsB, 382 

 Fseudocalanus elongatus, 370 

 Pseudohermaphroditism. 304 

 Pseud oklossia, New Species of, (!;> 



— pedinis sp. n., 63 



Pseudomonas Citri, the Cause of Citrus 



Canker, 222 

 Pseudo-pregnancy, 36 

 Pteridese, Lines of Phylesis of, 208 

 Pteridium, 208 

 Pteris, 318 



— (^Histiopteris) incisa, 208 



— loiKjifolia, (58 

 Pterodrilns iJurhini, 307 

 PteroidesB, Phylogeny of the, 208 

 Ptilidium puJcheirimum, 319 

 Ptychomitrium suhcrispatum, 321 

 Puccinia graminis, 84 



Experiments on Cereals with, 219 



Infection of Timotiiy-grass by, 219 



tritici-compacti, 327 



— SclerisB, 327 



— siibstriata, 327 

 Puget Sound Algse, 77 



Marine Station. 77 



Punjabensis, 391 

 Pustularki gigantea, 220 



Puymaly, A. de, Dichotomosiphon tuhero- 



sus, 74 

 Pyenidia, Growth of, SO 

 Pyrenopolyporis, 82 

 Pythium Deharyanum, 86 

 Pyxidicula invisitata, 170, 243 



Q 



Quaujer, H. H., Phloem Neeropis, 8.") 

 Quekett, Dr. Edwin, 414 



R 



Eabaud, Elienre, " Dislocated " Mice, 33 

 — Paralyzing Habits of some Hymeuop- 

 tera, 46 



Rabaud, Etienne, Reflex Immobilization in 

 Arthropods, 372 



— Role of Ganglia in Immobilization' 373 

 Rabbit. Development of Hypophysis of, 



362 



— Male, Sexual Activity of, in Relation to 



Progeny, 297 

 -■ — of, 298 



— Mammary Glands of. 35 

 Itamalinae cah'caris, 89 



— fastigiata, 89 



— fraxinea, 89 



— polHnaria, 89 

 Ramsbottom, J., 79 



Ramsey, G. B., A Ehizoctonia Potato 



Disease, 225 

 Rana pipiens, 296, 3G8 

 Rao, C. R. N., Iridocytes in Batrachian 



Larvae, 367 

 Rasmussen, A. T., Seasonal Changes in 



Interstitial Cells of AVoodchuck, 184 

 Raspberry, Disease of. 85 

 Rat, Albino, Growth ot Kidney of, 186 



— Development of Mammary Glands in, 



179 

 Eats and Evolution, 185 



— Growth of Parts of. and of the Whole, 



366 



— Young Albino, Effects of Underfeeding, 



297 



Rawdon, H. S., Unusual Feature in Micro- 

 structure of Wrought-Iron. 103 



Rawlins, F. I. G., Technique of the 

 Vertical Illuminator, 116 



Raw.son, H. E.. 115 



Rea, Margaret W., and Margarita de 

 Stelfox, Irish Mycetozoa, 90 



Beboulia Clutrrieri, 319 



— hemispherica, 319 



— oxidenfalis, 319 



— Eaddi, 319 



Redfield, Alfred C, and Elizabeth M. 

 Bright. Eifect of Radium on Fertili- 

 zation Membrane of Nereis, 307 



Reese, Albert M., Blood-corpuscles of 

 Alligator, 183 



Reeves, Edna M., Inheritance of Extrn 

 I5ristles of Drosophila, 375 



Refractometer, Interference, 94 



Regeneration, Osseous, 41 



Reiehenow, Ed.. Intracellular Digestion 

 in an Acarid, 379 



Rendle, Dr., The Use of Microscopical 

 Characters in the Systematic Study 

 of the Higher Plants, 317 



Report for 1917, 109 



Reptiles, Tapeworms of, 198 



— and Frogs, Trematodes of Queensland, 



308 

 Retroplumida;, 382 

 Retterer, Ed., and H. Neuville, Fatty 



Tissue of Crocodilians, 183 

 Reynolds, F. C, Polarization of Light, 397 



