AETHEOPODA — AEACHNIDS. 



91 



breathing took place by the admission of air to them through G-allery 



the stigmata. They are no longer gills, but lungs. Specimens ipgj^-j^Q'^e'g^ge 



of EosGorpius from England, and a fine scorpion from 23. 



Bohemia called Ci/clojMialmus sue exhibited. Later scorpions Wall-case 

 differ in no important respects from Eoscorpius. 



Adjoining the British fossil Eoscorpms are some other Table-ease 

 Carboniferous Arachnida, mostly found on splitting open 



Fig. 44.— An example of the Antliracomarti, Eophrynus Prestvicii, from 

 the Coal Measures of Dudley. A, upper surface; B, side view of front 

 shield, the front end being to the left ; C, under surface. i-VJ, appen- 

 dages of the fore-body, the base of ii bearing a biting process, mx ; 

 car, front shield with eye-pit, o ; pr. st, sternal plates on its under sur- 

 face ; the upper (tergal) and under (sternal) segments of the hind-body 

 are lettered 1-lOtg and l-9st respectively, that lettered gen. tg in A 

 corresponds to the generative openings on the under side. Enlarged 

 about 2 diameters, (From R. I. Pocock, Geological Magazine, 1902, 

 by permission of the Editor. Table-case 23.) 



nodular concretions of ironstone that occur in the Coal 

 Measures of Staffordshire and Lancashire. The most interest- 

 ing genera are Aiitliracosiro and Eoplirynus (^Fig. 44), which 

 belong to a group called Anthracomarti, apparently ancestral 

 to the recent Pedipalpi (whip-scorpions and allies) and 

 Opiliones or harvest-spiders, and in some respects inter- 

 mediate between them. The hind-part of the body is still 



