-No. 643] SEROLOGICAL PHENOMENA 



119 



members of the group is found in a pronounced purplish and green- 

 In the male of P. emphanes. while there are numerous green metallic 

 iridescent areas on the feathers of the uiiper wings and hack, they 

 have not yet progressed to the condition of being definite ocelli, 

 although on the tail of this same individual there are two trans- 

 verse bands (the one on the retrices, the otlier on the upper tail 

 coverts) of ocelli. Still a step in advance, in the male of P. tliihct- 

 anum, Gm. alhooreUatum Cuv.; type, Mus. d'hist. nat., Paris) 

 the small feathers of the wings and the feathers of the inter-scapular 



black, light brown, and whitJ. The tail is also banded with' ocelli. 

 In the male of P. germami the wing-coverts and back bear numer- 

 ous green ocelli. The female of this siK^cies, as usual less advanced 

 phylogenetically tliaii the male, lias the ocelli of the body much less 

 distinctly marked. 



An idea freciuciitly attaclicd to the theory of ortho- 

 genesis, yet which 1 holievo is in no wise a necessary 

 part of it, is tliat the various grades of a feature sui>posed 

 to show orthogenesis liave arisen as a connected succes- 

 sion, tlie su])]'»osedly most advanced stage liaving emerged 

 from th(' >tauv next in onler lu'lou- it.' That the individ- 

 uals ,.r a laruv -r..np wlm-h .^ho^v so,„r particular cliar- 

 actcri^li.- ,.xpr.-.rd in dilTciviit d. -ivr •-an Im- aiTam:v<l in 

 a u-radationa! m'i'k- ^^\\\^ icI'.'Ivimt lliat dia ra.-tcri^tic 



tluM.ry. thi^ <h>(- n<!t \^yn^v that tlir Nari.ui^ cxi .n-^ion. 

 (.r the chaia.-trr in .[n.-tion arc^.' thn^ ^.'.|nrntially. In 

 n iv.-Mit ^tn<ly vet nnpnl.!idu-d. ma.lr hv Mi^^ Swrali V. 

 d..iu- in thr dcpnrtnirnt of uviu'ti.- at tlir Vrnxw^hx m 

 WiM'.msin. ,.n the -mctical lieliavior cf .-h.-cks and hars in 

 inheritance in piuven^. h>r example. Mi^^ .lene^ eMiT,,!.- 

 orates the result- chtained hy Staph- i?i'..une an. I hy 

 Bonhote and Smalle\- which show that tiic two pattern- 

 are independently inlici-ited in Men.h'lian fa-iilen witli 

 checked-wing dominant to haiTed. She also found the 

 relation of uniform 1)]ack to cheek to he one of simple 

 dominance, and furthermoiv, tliat certain grades of check- 

 ing are inlieiatcd indein-n lent ly. lint -he found no evi- 



