488 JR. I. Pocock — On Eoijhrynus and Allied Arachnida. 



have been described as prestvicii, salmi, and sturi be unreservedly 

 admitted, the type-specimens must be carefully compared together. 



Another species that has been assigned to the genus JSophrynus is 

 the form that was described by Dr. Woodward as Brachypyge carbonis, 

 the principal synonymy of which is as follows : — 



Brachypyge carbonis, Woodw, 



Brachypyge carbonis, H. Woodw. : Geol. Mag., Dec. II, Vol. V (1878), pp. 433-6, 

 PI. XI ; id., Bull. Acad. Belg. (2), vol. xlv (1878), No. 4, pp. 410-415, 

 Avith plate. 



Anthracomartus carbonis, Scudder : C.R. Soc. Ent. Belg., vol. xxix (1885), pp. 84-85. 



Eophrynus carbonis, H. Woodw.: Geol. Mag., Dec. Ill, Vol. IV (1887), p. 49 

 (footnote) ; Q.J.G.S., vol. Hi (1896), p. cix. 



This species is represented by eight somites of the opisthosoma, 

 exposed from the dorsal side. The possibility of the correspondence 

 of these to the nine tergal plates of Eophrynus prestvicii by the 

 complete fusion of the original second and third to constitute the 

 large second tergal plate of the fossil, has been already discussed 

 (cf. supra, Pt. I, p. 444). The somites have the same general form and 

 structure as in Eophrynus, Kreischeria, and Anthracomartus, but differ 

 markedly in that the edges of the lateral laminse are emarginate 

 with projecting anterior and posterior angles. This structural 

 modification gives rise to the characteristically scalloped appearance 

 of the borders of the opisthosoma. The latter is wider than long ; 

 its central area is raised into an axial elevation due to the develop- 

 ment of a bilobed excrescence on each of the terga, that of the 

 second being exceptionally large and recalling the tubercular 

 eminence on the third tergal plate of Eophrynus prestvicii. No 

 lateral laminae are present upon the first or second plates, which 

 were themselves possibly fused ; and the last tergum visible on the 

 dorsal side is exceptionally large as compared with the homologous 

 plate in Eophrynus prestvicii. 



Nearly allied to but apparently quite distinct from the foregoing 

 species is the following, to which I am compelled to give a new name : 



Brachypyge celtica, sp.n. 

 Eophrynus carbonis, Howard & Thomas : Trans. Cardiff JSTat. Hist. Soc, vol. xxviii 

 (1896), pt. 1, pp. 1-2, figs. A and c. {Nee Woodward.) 



This species is also represented only by the opisthosoma; but 

 although the ventral surface instead of the dorsal is exposed, it 

 presents three characteristics in which it differs markedly from the 

 opisthosoma of B. carbonis, Woodw. In the first place it is much 

 wider than long, in the second place the second somite is con- 

 siderably wider than the first, and in the third place both the first 

 and second somites are furnished with lateral laminae similar in form 

 to those of the somites that follow. 



It consists of nine somites, in addition to the anal valve. The 

 first and second show very distinctly the impression of the missing 

 coxa and trochanter of the last appendages of the prosoma, which 

 were overlapped by their laterally expanded dorsal area. There is an 

 angular depression in the middle of the posterior half of the sixth 



