AKACHNIDES ARANEIDES. 49 



Percentage! of qroupt of Tertiary Sjii'lira in Europe and America, fffltuiinij thmr found in amber. 



Tho excess of proportion ill America of Orbitelaria 1 is licro nonrly as 

 jjreat as is shown in the former table, hut is not so ^ivat as the now height- 

 ened proportion in Kin-op.- ,>f K.-titclaria-, \vhilc the Tiil>iti.'l:iri;o an- now 

 the ones in which the proportion is similar in each, the Lateri^rail.-e the 

 only one \vhrn- the propoiiion remains nearlv the same as before, and the 

 Saltigradae are nearly lost si^'lit of in Knrop.-. a single species beiii^ 1 known. 



If now we carr\ the analysis a little further we shall find more inter- 

 esting relations, as will appear from the following talile, in which all the 

 groups represented in Knmpe are introduced, and both the total fauna and 

 the >pecie> fVoni the strata tabulaied : 



Number of tpet iary spiders found in Kurojn- nml in America, ty familiet. 



VOL XIII- 



