Dr. H. Woodrvard — Carboniferous Arthropods. 465 



Bivalve mollusca are extremely abundant in certain shale beds of 

 the Coal-measures, and many have been described and figured by 

 Sir Wm. Dawson, Dr. Wheelton Hind, and others.^ 



Fig. 1. — Anthraco7nya arenacea, Dawson, x 1^. Found on the same slab 

 with Euproops Amice, H. Woodw. From Donkin Pit, No. 6. Coal- 

 measures : Glace Bay Mines, Cape Breton, Nova Scotia. 

 The specimens of Limuloid Arthropods already described by me 

 from Nova Scotia in this Magazine (for September, 1899) were 

 referred to the genus Bellinurus ; those about to be noticed were also 

 obtained by Dr. Ami, but from the northern extremity of the province 

 at Glace Bay Mines in the Island of Cape Breton, and are referred 

 to the genus Euproops. (See Text-figs. 2-4, pp. 466-7, infra.') 



Order MEROSTOMATA, Dana, 1852. 



Sub-order II. XIPHOSUEA, Gronovan, 1764. 



1. Genus EuPKOops, Meek & Worthen, 1868, Geol. Surv. Illinois, 



vol. iii, 1868. 



Synonymy. — Prestivichia (H. Woodward, 1867), having been preoccupied 

 by Lubbock in 1863 for a genus of Hymenopteea, Euproops becomes the 

 type for the following species : — 



Euproops DancB, Meek & Worthen, Geol. Surv. Illinois, vol. iii, 1868. 

 E. {Prestivichia) anthrax, H. Woodw., Quart. Journ. Geol. Soc, vol. xxiii, 



p. 32, pi. i, fig. 2, 1867. 

 E. [Bellinurus) anthrax, Bailey, Ann. Mag. Nat. Hist., ser. ill, vol. xi, 



p. 113, 1863. 

 E. Colletti, White, Fauna of Indiana Coal-measures, Geol. & Nat. Hist., 



pi. xxxix, fig. 2, 1883. 

 E. longispina, Packard, American Naturalist, vol. xix, p. 292 (not figured), 



1885. 

 E. (Limulus) anthrax, Prestwich, Trans. Geol. Soc, ser, II, vol. v, pi. xii, 



figs. 1-4, 1840. 

 E. (Prestwichia) anthrax, Bolton, Trans. Manchester Geol. Soc, vol. xxxiv, 



fig. 120, p. ix, 1915. 

 E. (Prestwichia) Birtivelli, H. Woodw., Geol. Mag., Vol. IX, p. 440, PL X, 



Figs. 9, 10, 1872. 

 E. {Prestivichia) Birtivelli, H. Woodw., Pal. Soc Mon., Merostomata, pt. vi, 



p. 247, pi. xxxi, figs. 7a, b, 1878. 

 E. {Prestivichia) anthrax, H. Woodward, Pal. Soc. Mon., Merostomata, pt. v, 



p. 244, pi. xxxi, fig. 6, 1878. 



Euproops Amice, H. "Woodw., sp. nov. (Text-figs. 2-4, pp. 466-7.) 

 The specimens referred to this species consist of an almost 

 complete example and two detached head-shields of a new species 

 of "king-crab ", exposed on the surface of three slabs of black-grey 

 shale, associated with specimens of a bivalve mollusc, Aiithracomya 



1 See Quart. Journ. Geol. Soc, vol. 1, pi. xx, fig. 4, 1894 (W. Hind). 

 DECADE VI. — VOL. V. — NO. X. 30 



