390 



INDEX 



Comparium, 65 

 Competition 



interspecific, 386 

 Concepts, 10 ff. 



application of, 132, 372 



biological, 42, 45, 57, 74, 126, 

 132, 155, 296, 371 



conflicting, 6 



critique of, 42 



difficulties of, 371-383 



evolution of, 41 



genetic, 16 



and hybridization, 62 



importance of, 383-388 



morphological, 126 



multidimensional, 16 



of naturalist, 41 



nominalistic, 44 



nondimensional, 14-16 



philosophical, 11 



typological, 11, 42, 43, 45, 126 

 Conjugation 



definition, 188 

 Conodonts, 125 

 Constancy, 2, 7 

 Continuity 



evolutionary, 375 

 Copepods, 104 

 Coregonus, 110-120 



hybridization in, 118 



spawning behavior, 118 

 Coregonus albida, 111 

 Coregonus lavaretus, 111 

 Crassostrea, 354 

 C rep is, 70 

 Crinia signifera, 331 

 Criteria 



biological, 9 



serologic, 285 

 Crurithyris, 141 

 Cubitostrea, 145 

 Cuvier, C, 7 

 Cytoplasm, 185 



Danser, B. H., 65, 78 

 Daphnia, 82-110 



characters of species, 105 

 distribution of, 82 



helmet, 97 



hybridization, 106 ff. 



life cycle, 85 



phenotypic variation, 90 ff . 



reproduction modes, 86 

 Daphnia dubia, 106 

 Daphnia galeata mendotae, 106 

 Daphnia longircmis, 99 ff. 

 Daphnia longispina, 83 

 Daphnia middendorffiana, 107, 108 

 Daphnia parvula, 98 

 Daphnia pulex, 83, 84, 107, 108 

 Daphnia retrocurva, 93-99 

 Daphnia sch0dleri, 90, 91, 107 

 Darlington, C. D., 30, 37 

 Darwin, C, 3, 4, 7, 19, 325 

 Davidson, J. F., 44, 65, 78 

 Definitions, 16 



biological, 17, 46 



secondary speciation, 60 

 De Gads, C. F., 158, 317 

 Delimitation, 51 

 Delineation 



borderlines, 54 



difficulties of, 53 

 Deme, 28 

 De Vries, H., 5 

 Differences 



interspecific, 357 



morphological, 12, 376 



nongenetic, 363 



physiological, 386 

 Difflugia, 286 

 Dimorphism 



sexual, 373 

 Dippell, H., 167, 175, 177, 179, 189, 



216,219,317,323 

 Discontinuities 



kinds, 379 



morphological, 47 

 Dispersal 



consequences of, 218 

 Dobzhansky, T., 17, 18, 20, 26, 59, 

 72, 78, 283, 294, 296, 317, 326, 

 337 

 Dougherty, E. C, 19, 380 

 Drosophila, 35, 356 



behavior, 360 



