52 



TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



Measurciiiciifs in nun. — Total length 13; leng'tli of carapace 5, width 5"5 ; 

 median length of opisthosonia 8, width of opi«tliosoraa 7 ; length of ventral 

 surface of opisthosonia fi-oni apex of first sternal plate 11; length of first leg, 

 excluding coxa, 8, of third leg 11. 



Coseley, near Dudley. 



Type and only knoAvn si)ecinien in the Collection of Dr. Wheelton Hind. 



Geraphrynus tuberculatus, sp. nov. Text-figure 23. 



Carapace thickly and closely granular, short, much wider than long, its median 

 length about equal to that of the first seven tergal plates of the opisthosonia ; its 



Fig. 23 — Geraphrynus tuberculatus, sp. n. ; dorsal surface, four times nat. size. — Coal Measures; Coseley, 



near Dudley. W. Eggintou Collection. 



posterior border straight and transverse, in no sense convex, in the middle, almost 

 straight and inclined obliquely forwards and outwards at the sides. The anterior 

 six tergal plates of the opisthosoma each with a pair of distinct tubercles in the 

 middle; the first and second curved round the posterior edge of the carapace; the 

 third with its posterior border nearly straight; the median area of the first quite 

 distinct; the sixth nearly twice as long as the fifth, and about half the length of 

 the seventh or eighth ; the latter about two-thirds the length of the ninth, the 

 anterior Avidth of which is about two-thirds the width of the sixth ; the length of 

 the ninth about three-quarters its anterior width. The posterior borders of the 

 median area of the seventh and eighth terga straight, not angled. 



Ventral surface and appendages unknown. 



Measurements in mm. — Total length 1 8 ; length of carapace G, Avidth nearly 8 ; 

 median length of opisthosonia 12, Avidth of opisthosoma 8'5. 



