412 



H. F. OSBORX RECTIGKADATIONS AND ALLOMETRONS 



transition stages between species which correspond to the "Mutations of 

 Waagen." 



Table I. — Shoirihff the sfKicr, or f/coifrnphic (Viffcrcnccs in niaiiuiials obscrrcd 

 Inj the zoolof/ifit. ami the time, or t/coloffic (liffrrciirca obscrrcd hif the palcon- 

 tolof/iat. A. rrntral or .strin form. .\-(\ .1 ,-/>,. (/(Offraphic ".s7>rc/<'«." A-F, 

 iftolovie siK'cics. 



F 



B 



ij 



D' C B' A 



B C 



Coiitcmporaneons gfograpliic "species," "subspecies," "varieties," in 

 widely ftoparated localities in which there may be wide differences of 

 cuviroomciit and ontogeny or habit 



In a tr^ographic, or space series, on ilic other hand, as in the case of 

 genera of very wide geographic range, wc observe botli color clianges, 

 changes of proportion, or alloinetrons, and in rare instances new struc- 

 tures wliidi appear to resemble revt'ujradations. These geographic sub- 



