338 CARBONIFEROUS LAMELLIBRANCHIATA. 



Family CYPRINID^E. 



Cypeicabdia, Phillips, 1836. Geol. Yorks., pt. 2, p. 209. 

 Cypbicabdixes, Conrad, 1841. Aim. Rep. Geol. Surv. N.Y., p. 53. 

 Cypbicaudja (purs), cfe Koninelc, LS42. Desc. des Anim. Foss., p. 94. 

 Morris, 1843. Cat. Brit. Foss., 1st edit., p. 85. 



— Murchison, de Verneuil, and de Keyserling, 1845. Geol. Russie 



d'Europe, p. 304. 

 Goniophoea, Phillips, 184S. Mem. Geol. Surv. Gt. Brit., vol. ii, p. 264. 

 Cypeicaedia, d'Orbigny, 1849. Prodrome de Paleontol., p. 130. 

 Brown, 1849. Must. Foss. Conch., p. 198. 



— Eichwald, 1853-61. Lethsea Rossica, pt. 1, p. 1011. 

 Teapezixjm (pars), de Bychholt, 1853. Melanges paleont., pt. 2me, p. 130. 

 Solenopsis (pars), de liyclcholt, 1853. Ibid. 



Ctpuicaedia (pars), Morris, 1854. Cat. Brit. Foss., 2nd edit., p. 198. 

 Goniophoba (pars), Eiclm-ald, 1860. Lethsea Rossica, p. 1014. 

 Cypbicabma, Armstrong, 1864-5. Trans. Geol. Soc. Glasgow, vol. ii, pt. 1, p. 28. 

 Sanguinolites, Hall, 1870. Pal. New York, vol. v, p. 299. 



Cypuicakdia, Young and Armstrong, 1871. Trans. Soc. Geol. Glasgow, vol. iii, 



Supplement, p. 50. 



— Young, Armstrong, and Robertson, 1876. Cat. Western Scottish 



Fossils, p. 53. 



— Biysby, 1878. Thesaurus Uevonico-Carboniferus, p. 305. 

 EliCHAEis, Waagen, 1881. Pal. Iudica, ser. xiii, vol. i, pt. 3, p. 189. 

 Goniophoka, Hall, 1883. Pal. New York, vol. v, pt. 1, p. xxiii. 

 Sanguinolites (pars), de Koninck, 1885. Ann. Mus. Roy. d'Hist. Nat. de 



Belgique, torn, xi, p. 58. 

 Gonioi'HOEa, Hall, 1885. Nat. Hist. New York Palaeontol., vol. v, pt.l; Lamelli- 

 brauchiata, pt. 2, p. xxiii. 



— Fischer, 1SS7. Manuel de Couchyliologie, p. 1077. 

 Cypeicaedia (pars), Etheridge, 1S88. Brit. Foss., pt. 1, Palaeozoic, p. 282. 

 Gokiophoba, Miller, 1889. N. American Geol. and Palaeontol., p. 481. 



Whidborne, 1891. Devonian Fauna, vol. ii, pt. 1, p. 16. 



— Neumayr, 1895. Beit. z. einer Morpbol. Eintb. d. Bivalven, p. 35. 



— Beushausen, 1895. Abb. de K. Preuss. Geol. Landesanstalt, neue 



F., Heft 17, p. 196. 

 Caeuiomoeioia (pars), Beushausen, 1895. Abb. k. Preuss. Geol. Landesanstalt, 



neue Folge, Heft 17, p. 2S3. 



Generic Characters. — Shell equivalve, very inequilateral, more or less tri- 

 angularly rhomboiclal, with a very sharp elevated ridge passing backwards and 

 downwards from the umbo to the postero-inferior angle. The umbones are small 

 and acute, keeled. Lunule small, escutcheon well marked and elongate. 



Interior. — The adductor muscle-scars are well marked and deep. Hinge : the 



