Reports and Proceedings — Geological Society of London. 475' 



Another spider, Gerali/cosa, frora Eakonitz, admits of being ably 

 restored by the author, in whose honour it is named by Professor 

 Kusta. 



The genus HemipTirynus is also well preserved in a fossil state, 

 showing many details of its anatomy. 



Promygale with 3 species has much of its structure preserved 

 both on the upper and under side, especially in P. elegans from 

 Nyran, which is honoured with a plate, 2 text-figures, and a vignette 

 on the cover ; Eophlocus, a long-legged spider from Nyran, shows 

 the reproductive organs and limbs and the general form well 

 preserved. 



Anthracomartus is another well preserved type represented by 

 8 species ; 4 from Bohemia, 3 from Germany, and 1 from Arkansas, 

 U.S.A. This round-bodied and very distinctly segmented type is 

 closely allied to Brachypyge and Eophrynus ; in most of these forms 

 the dorsal surface of the body-segments is ornamented by a pattern 

 of minute raised granules. Antliracosiro appears not to have 

 possessed this ornamentation on the dorsal surface. 



Among the Pseudoscorpions Proihelyphonns boJiemicus, Kusta, is 

 a remarkably well preserved species, giving nearly every detail of 

 its structure and its attenuated series of abdominal segments. 



Good figures are also given of the Carboniferous and Silurian 

 scorpions of Bohemia, England, Scotland, Sweden, and America, of 

 which much has already been written in this country by Woodward, 

 Peach, Pocock, and others. 



But space does not admit of our dwelling more fully on this 

 interesting group of terrestrial air-breathing trachceated paleozoic 

 Arthropods, the direct descendants of the still more remote aquatic 

 branchiated Merostomata, Pterygotus, Slimonia, Stylonunis, and their 

 allies. 



We congratulate Dr. Fritsch upon this interesting monograph, and 

 wish him health and strength to pursue his studies on the fossil 

 fauna of his beloved country of Bohemia which he has done so much 

 to illustrate. 



:re^^oi?,ts ji^i^rjD lE'i^oaiBiBiDiisrcs-s. 



Geological Society of London. 



June 22nd, 1904.— J. E. Marr, Sc.D., F.E.S., President, in th& 

 Chair. The following communications were read : — 



1. "The Igneous Eocks of Pontesford Hill (Shropshire)." By 

 Professor William S. Boultou, B.Sc, Assoc. E.C.S., F.G.S. 



This paper is confined to a description of the characters and 

 sequence of the rocks within the limits of Pontesford Hill, and no 

 attempt is made to correlate them with those of the Uriconian 

 areas. The hill is a ' plagioclinal ridge,' bounded on all sides by 

 faults ; it is made up entirely of igneous rocks, but some of the fine 

 tuffs and volcanic grits show unmistakable signs of deposition in 



