34 TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



which nearly meet in the middle line. This cephalic area bears the eyes, arranged 

 in a transversely elongated, snboblong cluster, near its anterior border. The 

 posterior area of the carapace is marked with three pairs of radiating grooves, 

 those of the first pair being short and of the other pairs long ; behind the posterior 

 pair of these there is an angular median depression, the central fovea, from which 

 passes a posterior pair of grooves. Opisthosoma oval, showing six distinct tergal 

 plates. 



Type Species. — Eocteniza silvicola, sp. nov. 



In the Carboniferous genera and species of Araneae with segmented opistho- 

 soma, namely Arthrolycosa antigua, Harger, Scudderia carbanaria, Kusta, ? genus 

 fortis, Fritsch, ? genus beecheri, Fritsch, Eolycosa lorenzi, Kusta, Protolycosa anthra- 

 cophila, Roemer, Gerahjcosa fritschi, Kusta, and Rahomiicia antiqua, Kusta, there 

 appears to be no differentiated cephalic area such as is seen in Eocteniza. In 

 Palaranea borassifolia, Fritsch, which its describer, in his last paper, re-named 

 Arthrolycosa ? palaranea, there is no evidence that the opisthosoma is segmented, and 

 therefore no reason for assigning the fossil to the genus Arthrolycosa. The type of 

 Eolycosa lorenzi shows only a side view of the animal ; but in this genus it appears 

 that the whole carapace is strongly elevated. It may be added that the sjoecies 

 antiqua, carbonaria, fortis, beecheri, lorenzi, and borassifolia, which Fritsch refers to 

 the one genus Arthrolycosa, represent at least six genera and possibly as many 

 families if the drawings are to be trusted. 



Eocteniza silvicola, sp. nov. Plate IT, fig. 4. 



Carapace 5 mm. long, 4 mm. wide ; abdomen about 5 mm. long, 3*5 mm. wide. 



Coseley, near Dudley. 



Type and only known specimen in the Collection of Mr. Walter Egginton. 



Genus ARTHROLYCOSA, Harger. 



1874. Arthrolycosa, 0. Harger, Amer. Journ. Sci. [3], vol. vii, p. 219. 



1889. Artlirolycosa, C. E. Beeclier, Amer. Journ. Sci. [3], vol. xxxviii, p. 219. 



I refer with doubt to this genus a fossil (Text-fig. 10) in Dr. Wheelton Hind's 

 Collection, which is of very great morphological interest, although its exact syste- 

 matic position is indeterminable. That it belongs to the order Araneae rather than 

 to the Pedipalpi, I infer from the shape of the carapace and of the opisthosoma. 

 The carapace, although imperfect, appears to be about as broad as long, with 

 nearly straight anterior and posterior borders and evenly convex lateral borders. 

 It is marked with radial impressions and a somewhat A-shaped median 



