REVISION OF PREVIOUSLY PROPOSED CLASSIFICATIONS. 3 



Whenever possible, therefore, I have avoided making them. The characters of the 

 orders, families, and often of the genera are, on the contrary, of the highest interest. 

 They show that the Pedipalpi, Araneas and Ricinulei, and some of the Scorpiones 

 have existed almost unchanged down to the present day ; and that other Scorpions, 

 on the other hand, e. g. Eobuthns, differed considerably from modern types in one 

 feature at least, which may be described as Merostomatous. Apart from this one 

 fact, and for a possibly closer connection between the spider named Arthrolijcosa 

 and the Amblypygous Pedipalpi than exists in modern types, these orders were as 

 sharply defined as they are now ; and unless, as is possible, the extinct orders, 

 Haptopoda, Anthracomarti and Phalangiotarbi, serve to bridge to a certain extent 

 the interval between the Opiliones and more primitive orders of Arachnida, it can 

 hardly be claimed that the Carboniferous fauna throws much, if any, light upon the 

 origin and mutual relationship of existing orders of the class. In other words, 

 the available palasontological data supplied by a study of these Carboniferous 

 Arachnida do not furnish any strong evidence in favour of the evolution of the 

 class. Hence, for the common stock whence the Epectinate Arachnida originated, 

 we must look to deposits much earlier than those laid down in the Carboniferous 

 epoch. 



II -ANNOTATED REVISION OF PREVIOUSLY PROPOSED 

 CLASSIFICATIONS OF CARBONIFEROUS ARACHNIDA. 



1. Kaksgh, F. E., Zeitschr. deutsch. geol. Ges., 1882, pp. 556—561. 



Order 1. ARANE^]. 



Family Liphistiid^;. 



Genus Protolycosa, Roemer : P. anthracophila, Roemer. 

 Order 2. OPILIONES. 



Family Teogulid^. 



Genus Kreischeria, Geinitz : K. iviedei, Geinitz. 

 Order 3. ANTHRACOMARTI. 

 Family Aechitaebid^;. 



Genus Architarbus, Scudcler : A. rotundalus, Scudder ; subovalis, Wood- 

 ward ; silesiacus, Roemer. 

 Genus Anthracomartus, nov. : A. volkelianus, nov. 

 Family Eopheynid^;. 



Genus Eophrynus, Woodward : E. jjrestvicii, Buckland. 

 Order 4. SCORPIONES. 



Genus Eoscorpius, Meek and Worthen : E. anglicus, Woodward ; carlo- 



narius, Meek and Wortlien. 

 Genus Microlabis, Corda : M. stembergi, Corda. 

 Genus Cyclophthalmus, Corda : C. senior, Corda. 

 Genus Mazonia, Meek and Worthen : M. woodiana, Meek and Worthen. 



