34 TERRESTRIAL OARBONTFEROTTS ARACHNTDA. 



which iioai'ly inoct in tlio michllo line. This coplialic area boars the eyes, arranged 

 in a transversely clong-ated, suboblong cluster, near its anterior border. The 

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

 those of tlie 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. 



Tijpe Species. — Fjodenmi sllricola, sp. nov. 



In the Carboniferous genera and species of Arane^e with segmented opistho- 

 soma, namely Arlhrohjcosa tinfii/iNi, Harger, Snidih'ria cdrbniKiria, Kusta, ? genus 

 forfis, Fritsch, ? genus heeclieri, Fritsch, Eohjrosa lorenzi, Knsta, I' rof of i/cosa (niflira- 

 cophila, Roemer, Gerali/cosa fritschi, Kusta, and RakoDincia ((iitiqna, Kusta, there 

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

 Falaranea bonissi/oUa, Fritsch, which its describer, in his last paper, re-named 

 Arthroli/cosa ? ixdaranea, there is no evidence that the opisthosoma is segmented, and 

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

 Eohjcosa 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 species 

 anfiqua, carhonarla,fortis, heecheri, lorenzi, and horasnfolia, which Fritsch refers to 

 the one genus Arthroli/rosa, 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, ;>'5 mm. wide. 



Coseley, near Dudley. 



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



Genus ARTHROLYCOSA, Harger. 



1874. Arthrnlycosa, O. Harger, Araer. Journ. Sci. [3], vol. vii, p. 219. 



1889. Arthroli/cosa, C E, Beecher, Amer. Journ. Sci. [3], vol. xxxviii, p. 219. 



I refer with doubt to this genus a fossil (Text-fig. 10) in Dr. AVheelton 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 liorders and evenly convex lateral borders. 

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



