27 



Discina, Turton. Craniidce. 1833. 



Dithyra Brit. p. 238, ex parte. (= Crania sp.) 

 Discinella, Hall. {Incertce sedis.) 1871. 



23d Regent's Rep. p. 24-6, 1873. Extras Mar. 1871, fide Hall. Diag- 

 nosis only; no ex. cited. Gen. incert. Said to ::i^ operculum of Hyolithea 



( Pteropoda). 



DiscinidsB, Gray. Lyopomata. 1 840. 



Synops. Brit. Mus. i, p. 155. Ann. Mag. Nat. Hist, ii, p. 439. Fam. 

 Bracb. cont. Discina. 



Di§€mid£e, King. Lyopomata. 18^0. 



Perm. Foss. p. 81. Fam. Brach. cont. Discina, Orbiculoidea, Trematis. 



©iscinidae, Davidson. Lyopomata. 18^3. 



Intr. p. 51. Fam. Brach. coat. Difcina (f Oriiculoidea, Trematis), Sijyho- 

 notrela {? Acrotreta). Ibid. 1856, p. 90. 



Disciiiina, Agassiz. Lyopomata. 1 847. 



Norn. Zool. Index, p. 366. {:=^ Disdnidce, Gray corrig.) 



]>isciilisca, Ball. Biscinidce. 1871. 



Bull. Mus. Comp. Zool. iii, p. 37, May, 1871. Type Discina lamellosa, 

 Broderip, Reeve, Conch, Icon. pi. i, f, 4, 1862. (= Discina, auct. not Lam.) 



Eatoiiia, Hall. Bliynchonellidw. 1857. 



lOth Regent's Rep. p. 90, f. 1-7. No diagnosis. First sp. Atrypa mcxti- 

 alls, Vanuxem, Pal. N. York, iii, t. 37, f. 1. (L. Held.) Ibid. 12th 

 Regent's Rep. Oct. 1859, p. 35, f. 1-7, 1st. sp. E. peciiliaris, Conr. 184 1. Not 

 Eatonia, Edgar Smith, gen. Gasterop. 1875. 



£ichwaEdia, Billings. (?) Rhynchonellidw. 1858. 



Rep. Prog. Canadian Geol. Surv.p.l90. (L.Sil.) Type, p. 102, f. 24 

 a-e, 1. c. E. suhtrigonalis, Bill. Hall, 20th. Reg. Rep. p. 274. (Relations 

 doubtful.) Syn. DictyoncUa, Hall. 



Elonia, Meek & Hayden. Ehynchonellidce. 18G4. 



Pal. Upper Missouri (Jurassic), p. 70, September ; lapsus, pro Eatonia. 

 (= Eatonia, Hall.) 



Enteietes, Fischer de Waldheim. Arthropomata. 1 830. 



Oryct. Gouv. Moscou, 1830, p. 193, t. 26, f. 6-7. Ex. E. glabra, Fisch. 1. 

 c. Ibid. Bull. Soc. Imp Nat. Moscon, 1843,p. 16. 'E,x.E.Phillipsi,Y'mch. 

 {Gen. incert., probably = Spirifer, Sby.) 



Eittellites, G. B. Sowerby. Arthropomata. 1 842. 



Conch. Man. ed. ii, p. 144 ; lapsus (= E'tt/e7e<es, Fisch.). SaidbySow- 

 erby to be a heterogeneous assembly. 



Entog^yrse, Dalraan. Arthropomata. 18S8. 



Kougl. Vet. Acad. Handl. f. 1827, p. 89. Sect. Brach. cont. Dcltlujris, 

 Ci/rtia, Atrypa. 



Epithyi^ldse, Morris. Arthropomata. 1846. 



Quart. Journ. Geol. Soc. Loud, ii, p. 387. Division of Tcrebratula 

 cont. sections characterized by sculpture. 



