CLASS ARAGHNIDA 



GENERA.— Architarbus, xVrthrolycosa, Eoscorpius, Mazonia. 



Architarbus, Scudder, 1868, Geo. Sur. UL, 

 vol. 3. [Ety. arche, beginning ; tarhoi, 

 object of alarm.] 

 rotundatus, Scudder, 1868, Geo. Sur. 111., 

 vol. 3, Goal ileas. [Sig. rounded.] 



Aethrolycosa, Harger, 1874, Am. Jour. Sci., 



3rd series, vol. 7. [Ety. arthron, a 



joint ; lyhos, a spider.] 



antiqua, Harger, 1874, Am. Jour. Sci., 3d 



ser., vol. 7, Coal JNIeas. [Sig. ancient.] 



Eoscorpius, ileek & Worthen, 1868, Am. 



Jour. Sci., vol. 4.5. [Ety. eos, dawn ; 



scorpius, a scorpion.] 

 carbonarius. Meek AAV orthen, 1868, Am. 



Jour. Sci., vol. 4.5, Coal Meas. [Sig. 



pertaining to coal.] 

 Mazonia, Meek'& Worthen, 1868, Geo. Sur. 



111., vol. 3. [Ety. proper name.] 

 woodana. Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, Coal Meas. [Ety. 



proper name.] 



CLASS MYRIAPODA. 



GENERA. — Anthracerpes, Arohiulus, Euphoberia, Xylobius. 



Anthracerpes, Meek & Worthen, 1865, Proc. 

 Acad. Nat. Sci. Phil. [Ety. anthrax, 

 coal; erpo, to creep; in allusion to its 

 Carboniferous age and probable 

 habits.] 

 typus. Meek & Worthen, 1865, Proc. Acad. 

 Nat. Sci., Coal Meas. [Ety. type of 

 the genus.] This is probably a worm. 



Akciiiulus, Scudder, 1868, Mem. Bost. Soc. 

 Nat. Hist., vol. 2. [Ety. arclie, begin- 

 ning ; ioulos, a wood louse.] 



xylobioides, Scudder, 1868, Mem. Bost. 

 Soc. Nat. Hist., vol. 2, Coal JMeas. 

 [Ety. from its resemblance to the 

 genus Xylobius.] 

 Euphobbria, Meek & Worthen, 1868, Am. 

 Jour. Sci., vol. 45. [Ety. eu, very; 

 phoberos, formidable.] 



armigera. Meek & Worthen, 1868, Am. 



Jour. Sci., vol. 45, Coal Meas. [Sig. 



armed.] 

 major, INIeek & AVorthen, 1868, Am. Jour. 



Sci., vol. 45, Coal Meas. [Sig. large.] 

 Xylobius, Dawson, 1860, Quar. Jour. Geo. 



Soc, vol. 16. [Ety. xylobius, living in 



wood.] 

 dawsoni, Scudder, 1868, Mem. Bost. Soc. 



Nat. Hist., vol. 1, Coal Meas. [Ety. 



proper name.] 

 fractus, Scudder, 1868, Mem. Bost. Soc. 



Nat. Hist., vol. 2, Coal iNIeas. [Sig. 



frail.] 

 sigillarise, Dawson, 1860, Quar. Jour. Sci., 



vol. 16, Coal Meas. [Sig. from the 



Si^ilkiria in which it was found.] 

 simihs, Scudder, 1868, Mem. Bost. Soc. 



Nat. Hist., vol. 2, Coal Meas. [Sig, 



similar.] 



