GERALINURA. 29 



between Prothelyphonus and Geralinura is the segmentation of the carapace in the 

 latter and its entirety in the former ; but since I cannot find any evidence from 

 Scudder's figures of the type of Geralinura, namely G. carbonaria, that the carapace 

 is segmented, I have placed Prothelyphonus as a synonym of Geralinura, reserving 

 this name for the Carboniferous species of the Thelyplionidse, not because they 

 exhibit characters distinguishing them with certainty from existing genera, but 

 because it is impossible to be sure that they belong to one or to more than one 

 existing genus, and because the probabilities are in favour of their distinctness 

 from all modern types. 



No species of this group has hitherto been recorded from Great Britain. 

 Several specimens, however, are contained in the collections at my disposal, 

 although the material is, in my opinion, neither sufficiently abundant nor well 

 preserved to admit of specific differences being with certainty established between 

 the specimens. Provisionally, therefore, I refer them to one species. 



The real interest of the specimens lies in the evidence they afford of the former 

 existence of these Pedipalpi in Great Britain, and of their close agreement in 

 structural characters with recent representatives of the suborder. Some of the 

 Carboniferous specimens, that is to say, the two figured in this Monograph, seem to 

 differ from modern types in having the three last segments of the opisthosoma 

 less sharply marked off from the ninth segment and both wider and longer. But 

 it is impossible to affirm this character of all extinct forms. 



Geralinura britannica, sp. nov. Plate I, fig. 3; Plate II, fig. 3; Text-figure 9. 



A species of small size with the dorsal surface covered with coriaceous granula- 

 tion. Chela3 rather short and small, the five distal segments together rather 

 shorter than the carapace. The three terminal segments of the opisthosoma long, 

 nearly half the length of the rest of this region. Segments of the caudal flagellum 

 about as wide as long. 



Measurements in mm. — Total length from anterior end of carapace to end of the 

 last segment about 17; length of carapace about 5, width 3 - 5; total length of 

 opisthosoma (excluding flagellum) 11*5 ; width 4 - 5 ; length of segments two to nine, 

 8, ten to twelve (caudal portion) 3 - 5 ; length of visible portion of chela from base of 

 femur 4 - 5. 



Coseley, near Dudley. 



Type in Mr. Walter Egginton's Collection, No. 51 (PI. I, fig. 3). 



This collection contains a second and less well-preserved specimen (No. 49) 

 showing no features justifying its specific distinction from the type ; and in Mr. 

 Madeley's Collection there is an example from Coseley exhibiting the underside 

 structurally in agreement, so far as can be seen, with recent forms. Its total 



