ANCESTRAL Sl'lDEUS AND TIIEIK lIAlilTS. 



457 



The horizon from wliich this fossil was obtained is tiio Eocene Ter- 

 tiary, Garnet Bay, Isle of Wight. It is, therefore, probaljly somovvhat olilci- 

 than most European and American aranead fossils. 



According to Scudder, more tiian one-half the genera of known fossil 

 spiders to which species have been referred have been described as new 

 and peculiar to Tertiary times. These genera include about two-tifths of 

 the species. Among the genera are some remarkable forms, such as Archea 

 and Mizalia, each of which is considered by Thorell and others as repre- 

 senting distinct families.^ Further on I reproduce Berendt's drawings of 

 Archea paradoxa, to illustrate these peculiar forms. 



Fig. 385. Fic. 386. 



Figs. 385 and 386. Views of Palpipes priscus, a fossil crustacean larva. (After Von Meyer.) 



Two genera only of the thirteen to which the American species are 

 referred are described as new, and to them are referred seven of the thirty- 

 two species. Other genera not before recognized in a fossil state, but here 

 recorded from American strata, are Titanoeca, Tetragnatha, and Nephila. 

 To enter into details, seventy-one genera of spiders have been described 

 from the Tertiaries, sixty-six from Europe, and thirteen by Scudder from 

 America, eight genera being connnon to both. Of these seventy-one gen- 

 era, thirty-seven are counted extinct, thirty-five from Europe, and two 

 from America, none of these extinct species being found in both countries. 

 The European genera are, as may be supposed, largely composed of amber 

 species, no less than fifty-two, including thirty-two distinct genera, being 

 confined to amber deposits, besides others which they possess in common 

 with the stratified beds.'-^ 



Palpipes priscus ^ has been so long regarded as a Jurassic spider that I 

 have alluded to it in this chapter, but that it is not a true spider, but 



» Thorell, European Spiders, pages 223-233. 



- Sfudder, Tertiary Insects of X. A., page 51. I do not here include Eoatypus. 



3 Von :\Ieyer, Palieontographica, Bd. X., pages 299-304, Taf. L., Figs. 1-4, Cassel, 1863. 



