414 



H. F. OSBORX RECTIGRADATIOXS AND ALLOMETRONS 



Tablk II. — CoHtniift hrtirrcn npacc evolution (geographic) aud time evolution 

 {geologic) from a central or strm form A 



A I-\l is x\n actually rcconleU series of ascending: •Mutations of Waa.:;eii" 

 and "siJecies," assenibleil in the '•jreuiis" Menodiis. 



A-n and A'-D* are hypothetical ireoj^raphie varieties, et cetera, of Menodus. 

 which prohably existed in Ix)wer Olijrocene times for the *j;:enus'* is now 

 known to have raiijreil jreiiirraiihically from South Dakota to the vicinity of 

 I'rajr. Bohemui [AJenodus hohemieus). 



Hamid 

 base-level 

 environ- 

 ment 



Melanistic and 



perhaps large 



forms 





~ •> 



VI 



MriiO'luSi f/iiftihtriis 





2 ^ 





ast^-ending 'iiiniations 





11 





8 



o 



£ 7 





/ 7 













rs » 





6 



•J 









> 



^-r 





5 



~ 



- :r' 







--S 



5, 2 





4 



< 



tl 





3 



K 



? = 





>) ( > 



u 



« £ 







Z, 









E>3 



= tc 





1 " 



9 









^ 



a 





\' 



Meitodns gigantem 





-c r 







5 



s ^^ 





4 





2 ^ 







— 



-^ " X 





3 



^ 



--: oj 







a 



z: 



- n - 



- ,2 fc. 





2 



a 



1 



c 



,— "^ ^ 







> 



^' I'' 



IV 



Menodus trigonoceras 



r 



E-ri:- 





4 



^ 



Z -'■ = 





3 



^ 



5 " vi 







5i 



•-2 3 





2 



;3 



*- ~ " 









o 



n .- ^ 





1 " 



M 



oj *j :: 







o 



3[ * 







O 



OB C3 C 



III 



Mt-n(Hlus proudi ' ' 



2 2 2 





1 





3 *- - 

 III 



6-A , 



II 



MnifHins tornn' 



2 

 1 



I Mrnfuins helfx-eras 



® 



Arid 

 liigh-level 

 environ- 

 ment 

 D 



Pallid and per- 

 haps dwarfed 

 forms 



Si'A( i;. (;i:o(;i;ai'iii( I )i vi;i:gknck, and Kvolltiox 



Sotnatir changes rapid and i ouMpicuous ; germinal changcH gradual 



Environmental «e<t>lo;;ici and ontogenetic ( habitudinal ) intluences produc- 

 ing divergent somatic eflfe<ts on animals of similar ancestral stock, "environ- 



