No. 608] BIOCIIARACTERS AND ORGAXIC STBUCTUBE 453 



''groups of determiners" in the germ. ]\[any 

 characters are not entirely separable, but tend 

 to go in gi-on]is or to blend. 

 3. Charnrtrr In rifa<ir hlrurlnui, Castle, Osborn, 

 etc.. (.1)-ci-\-(m1 ill color, size, proportion, etc. 

 II. Separ<(l>iHtii in f/nicsls, Ijinrlmrartrr origin and evo- 



1. Origin through saUiifinn, laruc heritable leaps 



{saltiis, a leap, syii. (liM-oiitimiily. Bateson). 



2. Origin through mimifr hrrifuhJc f/radations 



{gradus, a step). Darwin (minute lieritable 

 variations), De Vries (imitations). 



3. Origin through continuiti/ (continuatio, an un- 



broken series ; continuous describes that which 

 is absolutely without pause or break, in con- 

 trast to saltation = leaps, gradation = steps). 

 It has been shown (Osborn) that characters 

 continuous in origin may be separable or dis- 

 continuous in heredity, as in both the new 

 roctigradations and now jiroprrtion characters 

 of tlie livbrid of tlie hor>o and the ass. 



tlnniinii nn/< jini/lcnf oru/nis. the irMle]>endent 

 pro(hict!(»n of siimhir hiocharaeters in organ- 

 isms of simih-ir ancotral athnitx'. tlie *'poten- 



