INDEX 



1143 



Secretion, of reserve bodies, 122; Golgi 

 bodies' relationship to, 143; external, 

 166-68 



Secretion granules, formation comparable 

 to segregation granules, 168; defined, 

 178 



Segregation granules, 132-38; term va- 

 cuome substituted for, 126; morphologi- 

 cal variations, 133; composition, 134; 

 formation comparable to secretion 

 granules, 168; universality of, rejected, 

 171, 174; defined, 178 



Seifriz, 49, 51, 52, 67, 87, 89, 95 



Selection, results of long-continued, 726- 

 29 



Self-fertilization (autogamy), 606-11, 

 654-59 



Serbinow, 104l, 1051, 1052, 1053, 1065 



Sergent, Ed., 848 



Sergent, Ed., and Sergent, Et., 844 



Serological reactions, specific, 873 AF. ; non- 

 specific, 875 f. 



Serotherapy against trypanosomes, 867 f. 



SevertzofF, 463 



Sex, an inherent characteristic of organ- 

 isms? 568; analogies in metazoan and 

 protozoan phenomena, 583 f.; sex, and 

 sex-linked, inheritance, 740-50 



Sexuality in unicellular organisms, 666- 

 709; Chlamydomonas, 666-87; Para- 

 mecium and other ciliates, 687-706; lit- 

 erature cited, 706-9 



Sexual reproduction, in all animals and 

 plants.'' 568; alternation of asexual 

 with, 566 f., 571-73 



Seyd, 803 



Shapiro, 519, 520 



Sharp, R. G., fibrillar system, 206, 251, 

 252, 258 



Sharp, R. H., 585 



Shettles, L. B., responses to light, 292 ff. 



Shock reaction to light, 273-77, 281, 295, 

 298 



Shoup and Boykin, 376 



Shumway, 423 



Siebold, Th. von, 413; established the 

 phylum Protozoa, 11; asserted unicel- 

 lularity of Protozoa, 13, 191 



Siegmund, 833 



Silverline system, 194, 227 



Simic, 820 



Simpson, 520 



Singh, 81 



Sinton et al, 847, 848 



Sinton and Mulligan, 846 



Size, factor in regeneration, 784-87 



Skvortzow, 1042, 1053, 1065 



Slater, 387 



Smith, 528, 539 



Snell, 534 



Soil-dwelling Protozoa, ecological consid- 

 erations, 6 



Soil extracts, 493 



Sokoloff, B., 774, 775, 782, 785, 786 



Sokolofif, D., 903, 1068 



Sonneborn, T. M., 588, 611, 615, 6l6, 

 654, 660, 661, 677, 690, 693, 696, 699, 

 700, 701, 704, 714, 752, 753, 754, 755, 

 756, 757, 758; Sexuality in Unicellular 

 Organisms (Chap. XIV), 666-709 



Sonneborn, T. M., and Cohen, B. M., 615 



Sonneborn, T. M., and Lynch, R. S., 697, 

 766 



Sotiriades, 850 



Soule, 356, 371 



Spallanzani, Lazaro, 8, 404 



Spasmoneme, 94 



Specht, 360, 362, 363, 369, 370, 425 



Specific gravity (or density), whole or- 

 ganisms, 77-79 ; relative, of cell inclu- 

 sions and components, 80-82 



Specificity in symbiosis, 894 



Spek, 54, 82 



Spencer, 653 



Spermatozoa, discovery, classification, 11 



Sphaerita, and Nucleophaga, 1040-59; 

 historical account and distribution, 

 1040-47; in free-living Protozoa, 1040- 

 43; in endozoic Protozoa, 1043-46; life 

 history and structure, 1047-53; eflfect 

 on host, 1057 f. 



Sphaeromyxa sahrazesi, life cycle, 608 f. 



Sphenophryidae, 933; adaptation, 941, 

 942 f. 



Spindle fibers, 90 



Spirochetes and rods adherent by one end, 

 1015-21 



Spirostomum ambiguum, fibrillar system, 

 250, 251 



Splenectomy and blockade, 832 



Spontaneous generation, history and solu- 

 tion of problem, 8 



Sporozoa, division processes, 28 ; survey 

 of functions having granular basis, 168- 



