- MMARY. 117 



Alps, and thence they passed southerly into the Italian bu a M grants also 



• in all other directions into the residua] basins to the north and south 



of tli> S tli Germany, in the province of Central 



While these faunas in the Northeastern Al|>- and Italy became analdainic 

 ur as the Arietidae were concerned, they were aldainio fauna- for Borne 

 other groups, like the Lytoceratidse, and also very likely for the LiparoceratidsB, 

 I 1 era tides, and possibly other families. These mixed faunas, which have been 

 deemed su are in reality the most instructive, and will 



to trace both chronological and chorological migrations with greater 

 security, if the views here advanced are correct 



Table V. shows thai there are but two examples of what Neumayr call- cryp- 



1 entral Europe, • pearing suddenly without apparent 



• : /' v '. l:D\\t'\ er, 



cannot \«- called an unquestionable cryptogenous form in the Northeastern Alps. 



! sin connected by intermediate forms, as stated above, with Psilo- 



uid it i« therefo tie thai in course of time the I evidences 



which . will be brought into accord with the paleozoblogy. 



• radical derived from PtU. caUpkyUum, or else from pre-existing 



i completi onnecting it or P 



'"iii with Gymnites of the I vidently due to the absence of an 



equally complet formations. That the intermediate Bpecies might have 



I ii forms, and therefore not represented in the rocky strata now 



I by Neumayr, is an admissible explanation. Newberry's 



hypothesis' of the retirement of the owever, equally supposable, and has 



Iditional recommendation of explaining the absence both of intermediate 



forms and of the Bedimenl thinks thai the presence of intermediate 



links in j. .and their absence from localities so far explored, 



ible on the on that the chain of the rockj deposits is incom- 



. 1 that tin- sea had n-tircd from them carrying with it 



the threads of life The missing links of the ere thin evolved in other 



brought back by tin- return of ' to its fori 



1 to us more in accord with what is already known of the merelj 



■: i «'t th ird in any one region, tl wal discov- 



»rd in cither places, and the want of absolute 

 synchronism I" I ■ and tliof \ 



That /'" pla i littoral form, ;>< well at ners, can hardly be 



doubt! • facta quoted above, the ited in the 



with bom ms and even remains of insects it 



fond. The ren M utin and other author-, < i ti< >t • pon the charac- 



helle in the < ind the broken ' the .-hells 



of Ami ired with those of swimmers like the Nautiloid* 



leparrmenl iii and Blak< 



■ 



