114 Alexander Pcirunkevitch, 



Family Architarbidae. 

 Genus Architarbus Scudder 1868. 



1. A. fotundatiis Scudder, Geo). Surv. Illinois, Vol. Ill, 1868, p. 568, 

 fig. 4. 



= Geraphrynus carbonarius Scudder, Proc. Amer. Acad. Arts Sci., 

 Vol. XX, 1884, p. 16. Id., Mem. Boston Soc. Nat. Hist., Vol. IV, 

 1890, p. 446, pi. 40, figs. I, g, 10, 12. 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, 



Illinois. 



2. A . horribilis (Melander) 



= Hadrachne horribilis Melander, Journ. Geol., Vol. XI, 1903, 

 p. 180, pi. V, fig. i; pi. VII, fig. I. 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, 



Illinois. 



3. A. angiUatus (Pocock) 



= Geraphrynus angulaius Pocock, Carb. Arachn., 191 1, p. 49, 

 pi. Ill, fig. 2, text figs. 19, 20. 



From the Coal Measures of Coseley, near Dudley, England. 



4. A. hindi (Pocock) 



= Geraphrynus hindi Pocock, loc. cit., p. 51, text figs. 20, 21. 

 From the Coal Measures of Coseley, near Dudley, England. 



5. A. eggintoni (Pocock) 



= Geraphrynus eggintoni Pocock, loc. cit., p. 53, text figs. 24, 25. 

 From the Coal Measures of Coseley, near Dudley, England. 



6. A. torpedo (Pocock) 



= Geraphrynus torpedo Pocock, loc. cit., p. 54, text figs. 26, 2j ; 

 pi. Ill, fig. I. 



From the Coal Measures of Coseley, near Dudley, England. 



7. A. angustus (Pocock) 



= Geraphrynus angustus Pocock, loc. cit. p. 55. 

 From the Coal Measures of Coseley, near Dudley, England. 



8. A. minor n. sp. 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, 

 Illinois. 



Genus Opiliotarbus Pocock 1910. 

 I. 0. elongatiis (Scudder) 



= Architarbus elongatus Scudder, Mem. Boston Soc. Nat. Hist., 



Vol. IV, 1890, p. 449, pi. 40, fig. 4. 



= Geraphrynus elongatus Fritsch, Pal. Arachn., 1904, p. ^'^, text 



fig- Z7- 



0. elongatus Pocock, Geol. Mag., (V), Vol. VII, 1910, p. 511. 



