487 



[1915-19-] 



Pistacia. — Reid, C, 6. 



Pit structures, in sedimentary rocks. 



—Kindle, E. M., 6. 

 Pilar.— Pilsbry, H. A., 3. 

 Pitaria— Clark, B. L., 1 & 5; Coss- 



mann, M., 8; Dall, W. H., 5; 



Dickerson, R, E., 4 & 9. 

 Pitcairn I. (S. Pacific).— Marshall, P., 



14. 



Pitchblende, Colorado. — Alsdorf, P. 



R. ; Collins, H. 

 , Cornwall. — -Penrose, R. A. F. 



fiU 1. 



, Devonshire. — Anon., 116. 



, Mexico. — Castro, C, 2. 



, extraction of radium from. — 



Cable, Mrs. R. 

 Pitchstone, Arran. — Scott, A., 5. 



, Cantal. — Lacroix, A., 41. 



, I. of Mull.— Anderson, E. M., 2. 



■ , xenoliths of, in basalt, Arran. — 



Tyrrell, G. W., 7. 

 Pitcullo (Fife).— Balsillie, D., 1. 

 Pithecanthropus. — Gregory, W. K., 



5 ; Hrdlicka, A., 1 ; Vallois, H. V. 

 Pithecolobium. — Matson, G. C, 3. 

 Pits, in zincblende crystals. — Ichi- 



kawa, S., 4. 

 Pittizite.— Doelter, C, 1. 

 Pittsburgh (Pennsylvania). — Kuhn, 



H. A. 



Pityophyllum. — Mceller, H. 

 Pityoxylon. — Stoj^es, M. C, 2. 

 Piura R. (Peru). — Portocarrero, J. 

 N., 1. 



Pizzetti, P., Obit. — See Jadanza, N. ; 



& Reina, V., 2. 

 Pizzo Valanghe (Sicily). — Gregorio, 



A. de, 5. 



Place names, geologv &. — Reusch, 

 H., 6. 



Placenticeras. — Waring, C. A. 



Placer deposits. — Beyschlag, F. 



, British Columbia. — Tyr- 

 rell, J. B., 11. 



, California. — Ailing, M. N. 



Placopsilina. — Chapman, F., 18. 



Plac.oxaurus. — Deperet, C., 5. 



Placotelia. — Oppliger, F. 



Plagiocardium. — Newton, R. B., 1. 



Plagioclase, dipyrisation of. — Lacroix, 

 A., 31. 



, grouping of. — Calkins, F. C, 2. 



, twinning of. — Goldschlag, M. 



. See also Felspar. 



Plagiodontia. — Miller, G. S., 2. 

 Playioecia. — Canu, F., 9. 

 Plaaior/lypta. — Branson, E. B., 3; 



Girty,' G, H., 1. 

 Playiolophus. — Deperet, C, 5. 

 Plwjiopodopsis. — Knowlton, F. H., 4. 

 Plagioptychus. — Douville, H., 22. 

 Plagio8mittia. — Canu, F., 11. 

 Plagiostoma. — Cossmann, M., 5; 



Girty, G. H., 1. 

 Plaqiozam ties. — Bassler, H. 

 Plainview (Texas).— Merrill, G. P., 



12. 



Plan d'Aups (Var). — Repelin, J., 2. 

 Planaxis. — Cossmann, M., 1. 

 Plancheite. — Zambonini, F., 9. 

 Planera. — Knowlton, F. H., 4. 

 Planipennia, Triassic. — Tillyard, R. 



J., 2 & 6. 

 Planolites.— Walcott, C. D. 3 2. 

 Planorbis. — DaU, W. H„ 2; Dollfus, 



G. F., 5; Johansen, A. C. ; Roman, 



F. , 2. 



Planorbulina. — Yabe, H., 7. 

 Plant beds, Finland. — Ramsay, W. 



, S. America. Berry, E. 



W., 17. 



zones, Carboniferous. — Ber- 



trand, P., 10. 



Plantse, Carboniferous.— Arber, E. 

 A. N., 1; Barbour, E. H., 2; Ber- 

 trand, P., 1-10 ; Bureau, E. ; Camp- 

 bell, R., 2; Carpentier, A., 1; 

 Gordon, W. T., 1 & 2; Kidston, 

 R., 1, 2, 4 & 5; Renier, A., 4; 

 Scott, D. H., 5-7 & 9; Stopes, 

 M. C, 1; Welsch, J., 5; Wilson, 

 W. J. 



, Cretaceous. — Berry, E. W., 



3 & 4; Cockerell, T. D. A., 11; 

 Knowlton, F. H., 3; Kryshto- 

 fovich, A., 1 & 2; Penhallow, D. 

 P. ; Stopes, M. C, 2, 4 & 6; Zeiller, 

 C. R„ 2. 



, Devonian. — Arber, E. A. N., 



8; Halle, T. G., 5; Home, J., 7 & 

 10; Johnson, T. ; Kidston, R., 

 6; Kolderup, C. F., 6; Matthew, 



G. F., 3; Nathorst, A. G., 2; New- 

 lands, G. 1. 



, Eocene. — Smith, W. S., 2. 



, Jurassic. — Backlund, H., 1 ; 



Knowlton, F. H., 5; Thomas, H. 

 Hamshaw, 2 & 3 ; Walkom, A. B., 7. 



, Liassic. — Lozano, E. D., 1 & 



2; Wieland, G. R., 1. 



, Mesozoic. — Antevs, E., 1; Ben- 

 son, W. N., 10; Chapman, F., 34; 

 Halle, T. G., 1 & 3; Knowlton, 



F. H., 6; Walkom, A. B., 1-7. 

 , Miocene. — Chauvet, G. ; Knowl- 

 ton, F. H., 4; Principi, P., 2 



, Neolithic. — Gidon, F. 



, Oligocene. — Jennings, O. E. ; 



Matson, G. C, 3. 



, Palajozoic. — Chapman, F., 33. 



, Pleistocene. — Berry, E. W., 



5 & 13; Gertz, O., 1; Halle, T. 



G. , 4; Nathorst, A. G., 7; Reid, 

 C, 1. 



, Pliocene.— Reid, C, 0; San- 



giorgi, D., 2. 



, Rhsetic.— Pelourde, F., 1 & 2. 



, Tertiary. — Baumberger, E., 2; 



Berry, E. W., 10, 18 & 20; Chaney, 



R. W.j Colani, M. ; Koiwai, K. ; 



Nathorst, A. G., 1. 



, Triassic— W herry, U T., 10. 



. See also Alga>. 



Plants, ancient types of. — Turrill, 



W. B. 



