376 



IXDEX. 



Onion Bulbs, White Rot Disease of, 244 

 Oochoristica from Lizards, 201 

 Oogenesis, Kelationship between the For- 



raation of Yolk and the ^litochondria 



and Golgi Apparatus during, 129 

 Ophio;i;loss;tCe8e, IMt-clo.sing ^lembrune in, 



218 

 Optical Instruments, Standardization of 



the Elements of, 357 

 Orthoptera, British, 321, 357 



— Olfactory Sense in. 196 



Osborn, Herbert, 3l( ado-.v I'lant-bng, 51 

 Ostracods, Cave, 324 

 Ostrich, Germ-plasm of. 35 



— Xew Adaptive Callosity in, 43 



— I'lumet-, Increasing Number of, 309 

 0strup, Ernst. Fresh- water Diatonis from 



Iceland, 341 

 Overholts, L. O., INIvcological Notc^s for 



1919, 348 

 Owen, M. N., Skin Spot Disease of Potato 



Tubers, 349 

 Oxus, 5o 

 Oxytricha without a Micronucleus. 207 



Painter, T. S., Spermatog(uesis in Anolis 



caroH^ensis, 181 

 Pancreas, Development of, 182 

 Fanorpa comnamis. Venation of, 196 

 Pantel, J,. Dorsal Bloo 1 -vessel in Larval 



Muscids, 50 



— Intestinal Glands in Larval Insects, 50 

 Paramoecia in Sterile Culture Medium, 210 

 Parasa lejiida, Urtieating Hairs of, 317 

 Parasitism of Pytlouiu dthariianum on 



Potato Tuber, 242 



Parasitized Fish, 189 



Paravicini, Eugen, Behaviour of the 

 Nuclei in Reproduction of Smut 

 Fungi. 91 



Paravicini, Z., Fusaiiinn, 235 



Pardo, Luis, Fresh- water Plankton from 

 Gandia (Valencia), 222 



Paris, Paul, Cave Ostracods, .■>24 



I'armelin cdmlsrhadalis, 99 



Parodiella, (♦() 



Partheuogenetic Development, 30(1 



Paseher, A., Colourle.-^.s Series of P^'lagel- 

 lates, 221 • 



Patch, p]dith M.,-]Midge Infesting Pota- 

 toes, 51 



— I'syllid Gall on Juncus, 51 

 I'atouillard. N., Clfivariop-is Holt, 237 

 Paulson, Robert, I, ichen-Flora of Hertford- 

 shire, 99 



— and Percy (i. Th()nip.,on. Lielieus of 



Eppintr Forest. 245 

 Peaclies, Dipterous Parasite of, 50 

 Pelagic Flora of the Hav of Quarto dei 



Mille, 83 



Pentastomid in Man, 200 



Peridermiuru cerebrum and Peridermium 



Harknesaii, Facultative Heteroccism 



in, 347 

 I'eridinese of New South Wales, 222 

 Perisphinctiuse. Cost£e in, 45 

 l*erisi)oriace8e. South African, 234 

 Periwinkle, Breeding and Habits of, 313 

 Peronospora, 86 



— New, for Italy (Peronospora Radii De 



Bary), 231 



Peters. R. A., Nutrition of Protozoa : 

 Growth of Paranlcecia in Sterile Cul- 

 ture Medium, 210 



Petersen. C. G. Joh., Development of 

 Gobies, 301 



Petch, T., Ceylon Fungi. 92 



— Gasttroiiiycetes ZeyUnticx, 92 

 I'ethybridge, G. H., and H. A. Lafferty, 



Disease of Tomato and other l*lants 

 caused by New Species of Phyto- 

 phthora, 243 

 Petraek, F., Fungus-Flora of jMoravia 

 and Austrian Silesia, 97 



— Myctdogical Notes, 348 



Peyronel, B., Blepharo^pora terrestris 



(Sherb.) Peyr., 345 

 Phacidiales, 86 



Philocopra eoeruleotecta Rehm sp. n., 232 

 Phlebotomus, Pliilii)pine Species of, 51 

 Phomopsis jiiniperorora, 235 

 Phyllosticta Blight of Snapdragon, 241 

 Physiological Inertia and Momentum. 186 

 Phytophthora Disease of Tomato and 



other Plants, 243 



— i)ifestans. Amount of Copper required 



for the Control of, 349 

 I'ictet, Arnold, Lymantria dispar. 49 

 I'icris and Euchloe. Caterpillars of. 193 

 Pieron, Henri, Homing of Limpet, 191 

 Pig, Absence of Hind Legs in, 36 



— Development of Shoulder-Girdle of, 



303 

 Pilsbry, Henry A.. Peculiar Venezuelan 



Land Snail, 46 

 Pinrhat paralitica Grove, 239 

 Plana rians. Head-generation in, 325 

 Plankton, Acticm of Sulphate of Copper 



on, 81 



— Fresh-wator, from Gandia (Valencia), 



222 

 Plant Diseases, 244 

 IMant-bug, 51 



lice, .Iumi)ir.g, 53 



Plants, Alternation of Generations iu. 79 

 Plasmopara, S6 



IMastids, Mitochondrial Origin of, 212 

 Plath. O. E.,Muscid [>arva Sucking Blood 



of Nestlings. 320 

 Phttyzorna mirrophi/Umn R.Br., 74 

 Plavfair. G. L, IVridineaj of New South 



* Wales, 222 

 Pleahocitrrhia pileus, 205 



