R. I. Pocock — On Eophrynus and Allied Arachnida. 487 



EXPLANATION OF PLATE XX. 



Fig. 1. FMUipsia Folleni(?). Lower Culm-measures : Coombe Wood, Coddon 

 Hill, near Barnstaple. Nat. size. Mrs. Coomaraswamy's (Miss E. M. 

 Partridge) collection. 



,, 2. Ibid. Hanuaford Quarry, x 2. 



,, 3. FMUipsia spatulata, sp. nov. Same form. : Coombe Wood. Nat. size. 

 Mr. Coomaraswamy's collection. 



,, 4. Ibid. Overton Quarry. Nat. size. Mr. J. G. Hamling's coUectiou. 



,, 5. Froetus Coddonensis, sp. nov. Entire specimen. Lower Culm-measures : 

 Coombe Wood, near Barnstaple, x 5. Mr. Coomaraswamy's coll. 



f, 6. Ibid., pygidium. Hannaford Quarry, x 2. Mrs. Coom§.raswamy's coll. 



„ 7. Ibid., cephalon. Coombe Wood, x 3. Coll. ditto. 



,, 8. Ibid., entii'e specimen. Same form., loc, and coll. x 4. 



,, 9. Ibid., cephalon. Same form., loc, and coU. x 3. 



„ 10. Ibid., cephalon. Same form, and loc. x 4. Mr. J. G. Haml in g's coll. 



,, 11. Ibid., entire specimen. Same form, and loc. x 4. Mr. Coomaraswamy's coll. 



,, 12. Froetus, sp., pygidium. Same form. : Hannaford Quarry. Nat size. 

 Mr. Coomaraswamy's coll. 



,, 13. FMUipsia Folleni (^), hee ch.eek.. Same form., loc, and coll. x 1|. 



,, 14. Grijithides FarkeifST^.noY. Culm-measures (?) : Bishopston, Glamorgan- 

 shire. X 3. Mr. F. Barke's collection. 



,, 15. Ibid., hypostome. Same form., loc, and coll. x 3. 



II. — Eophrynus and Allied Carboniferous Arachnida. 



By E. I. Pocock, F.Z.S., of the British Museum (Natural History). 



{Concluded from p. 448.) 



Part II. 



2. Classification of Eophrynus and its Allies. 



Several Arachnida allied to Eophrynus prestvicii have been dis- 

 covered in beds of Carboniferous age. Of these the only species 

 known to me as belonging unquestionably to the genus Eophrynus 

 that has been properly described and figured is the form from 

 Silesia named Eophrynus (in error written Euphryniis) salmi by Stur.^ 

 The type is 27 mm. in total length, the prosoma being 8 long and 

 the opisthosoma 19 long and 14 wide. The last-named region is 

 thus considerably narrower in relation to its length than it is in 

 E. prestvicii. Apart from this, it is noticeable that the admedian 

 dorsal tubercles, except on the second and third terga, are much 

 smaller than the laterals. 



Haase ^ has characterized a third species of Eophrynus as E. sturi. 

 It is said to be intermediate between E. prestvicii and E. salmi 

 in having the joints of the lateral tergal laminse less distinct 

 than in the latter, and more distinct than in the former. Haase's 

 knowledge of E. prestvicii, however, was derived from the figure 

 of the type from which the artist omitted the sulci in question. 

 As already described, they are well developed. Hence any inference 

 that is based upon their assumed absence is erroneous. It seems 

 probable that the degree of their distinctness in any given case 

 is more likely to be attributable to the state of preservation of 

 the fossil than to a natural structural variation. Lastly, it appears 

 to me that before the specific distinctness of the three forms that 



' Abb. k.k. geol. Eeich., vol. viii (1877), pt. 2, Vorwort, p. v, with figure. 

 2 Zeitschr. deutsch. geol. Ges., vol. xlii (1890), p. 64. 



