Fossil Scorpions 127 



family Eoscoipionidae. He considered the genus Microlabis as synony- 

 mous with Cyclophthalmus. In the genus Eoscorinus Meek and Worthen, 

 he placed carbonarms Meek and Worthen, anglicus Woodward, euglyptus, 

 glaber, inflatus and tubercidutus Peach. The genus Cyclophthalmus 

 contained st ember gii and senior Corda. 



Hasse's Redivision of the Order. Hasse^' redivided the order Scor- 

 piones with respect to the true scorpions, into the sub-order Anthraco- 

 scorpii, family Eoscorpionidae and sub-families Eoscorpionini and Cyc- 

 lophthalmi. 



Frit sell in Continental Europe. Under the order Scorpiones, 

 Fritsch" recognized the sub-order Dionychopades and family Anthraco- 

 scorpii, which he divided in seven genera. To the four genera, — Eoscor- 

 pius Meek and Worthen, Microlabis Corda, Cyclophthalmus Corda, and 

 Mazonia Meek and Worthen, recognized by Karsch, he adds three new 

 genera and two new species from material mainly undescribed. These 

 new genera and species are as follows: Isobuthiis kralupensis (Thorell 

 and Lindstrom), Eobuthus rakovnicensis and Feistmantelia ornata. 



Pocock in England. In his monograph on the English forms, Po- 

 cock" made some radical revisions of the classification. He first divided 

 the order Scorpiones (other than Silurian) into two divisions, the 

 Lobosterni, and the Orthosterni. The Lobosterni contained those forms 

 having bilobed, joosteriorly-laminate sternal plates on the opisthosoma 

 and skeletal plates on each side of the genital operculum. In the di- 

 vision Lobosterni, he placed the genus Eobuthus of Fritsch to which he 

 assigns a single species holti, a very fragmentary specimen, from the 

 Shipley Clay pits. Pocock also thought Isobuthus of Fritsch might be 

 assigned to the same grov^p. The division Orthosterni contains the 

 genera Archaeoctonus, CyclopJithalmus and Ayithracoscorpio. To Arch- 

 aecctonus Pocock, he assigned Eoscorpius glaber Peach, and E. tubercu- 

 latus Peach. In the genus Cyclopthalmus Corda, he placed the species 

 Eoscorpius euglyptus Peach. In the genus Anthracoscorpio he placed 

 Eoscorpius sparthensis (Baldwin and Sutcliffe) and added two new 

 species, dunlapi and buthiformis. 



Late Revision of the Ainerican S^iecies by Petrunketntch. In Amer- 

 ica Petrunkevitch^ ' has revised the entire Class Arachnida. In his work 

 on the scorpions he was able to bring together all the then known speci- 

 mens for re-examination. He divided the order Scorpiones into two 

 sub-orders, the Apoxypoda containing the Silurian forms and the Diony- 

 chopoda containing the Carboniferous forms. In the sub-order Diony- 

 chopoda he recognized four families, 12 genera and 23 species, of which 

 six genera with nine species are restricted to Europe, and five genera 

 with six species are restricted to America. The genus Eoscorpius, 

 regarded by Pocock as unsound, is accepted by Petrunkevitch. To it he 



" Hasse, E.— Zeitsch. deutsch. Geol. Ges. 1890, pp. 629-657. 



'^ Fritsch, A. — Palaeozoische Arachniden, 1904, Prasue pp. 5-80. 



'^ Pocock, R. I. — Monosiaph of the Carbonifeious Arachnida of Great Britain, Pal. 

 Soc. 



'^Petrunkevitch, A.— Monograph of the Carboniferous Arachnida of North Amer- 

 ica, Trans, of Conn. Acad, of Arts and Sciences, Vol. 18. 



