52 



POLYPI. 



splendens, Billings, 1874, Pal. Foss. vol. 

 2, Up. Sil. [Sig. splendid.] 



websteri, Dawson, 1868, Acad. Geol., 

 Niagara Gr. [Ety. proper name.] 

 DicTYosTROM,\, Nicholson, 1875, O. Pal., vol. 

 2. [lity. dictyon, a net ; stroma, a layer.] 



undulata, Nicholson, 1875, Ohio Pal. vol. 

 2, Niagara Gr. [Ety. from the undu- 

 lating layers.] 

 DiDY>roGRAPTUs, McCoy, 1851, Pal. Foss. 

 [Ety. didymos, twin or double ; graplio, 

 to write.] 



caduceus, Salter, 1853, (Graptolithus ca- 

 duceus) Quar. Jour. Geo. Soc, vol. 9, 

 Quebec Gr. [Sig. falling down, frail.] 

 DiPHYPHYLLUM, Lonsdalo, 1845, Rusa. & 

 Ural. Mts. [Ety. diphyia, a division ; 

 phyllmi, a leaf.] 



archiaci, Billings, 1859, Can. Jour., Up. 

 Held. <*i Ham. Gr. [Ety. proper name.] 



arundinaceum, Billings, 1859, Can. Jour. 

 Corniferous Gr. [Sig. like a reed.] 



csespitosum. Hall, 1852, (Diplophyllum 

 ciespitosum) Pal. N. Y., vol. 2, Niagara 

 Gr. [Sig. turf-like.] 



coralliferum. Hall, 1852, (Diplophyllum 

 coralliferum) Pal. N. Y., vol. 2, Coral- 

 line limestone. [Ety. coralium, a coral; 

 fero, to bear; in allusion to the fact 

 that the specimens were found en- 

 closed in a species of Stromatopora.] 



gigas, Rominger, 1876, Foss. Corals., Ni- 

 agara Gr. [Sig. great.] 



huronicum, Rominger, 1876, Foss. Corals, 

 Niagara Gr. [Ety. proper name.] 



rectiseptatuni, Rominger, 1876, Foss. 

 Corals, Ham. Gr. [Ety. from the 

 straight septae.] 



stramineum, Billings, 1859, Can. Jour., 



Corniferous Gr. [Sig. made of straw.] 



DiPLOGRAPTus, McCoy, 1854, (Diplograpsus) 



Brit. Pal. Rocks. [Ety. aiphos, duplex ; 



grapho, to write.] 



amplexicaulis. Hall, 1847, (Graptolithus 

 amplexicaule) Pal. N. Y., vol. 1, Trent. 

 Gr. [Ety. awipkxiw, emliracing; rnulis, 

 a stalk or stem. ; in allusion to the 

 triangular scales surrounding the cen- 

 tral stipe.] 



angustifolius. Hall, 1859, (Graptolithus 

 angustifolius) Pal. X. Y., vol. 3, Hud. 

 Riv. Gr. [Sig. narrow-leaved.] 



ciliatus, Emmons, 1856, Am. Geol., Trent. 

 Gr. [Sig. fringed.] 



dissimilaris, Emmons, 1856, Am. Geol., 

 Quebec Gr. [Sig. dissimilar.] 



foliacfus, (7) Murch, 1839, (Graptolitegfoli- 

 aceus) Murch, Sil. Syst., Hud. Riv. Gr. 

 [Sig. leaf-like.] 



foliosus, Emmons, 1856, Am. Geol., Que- 

 bec Gr. [Sig. full of leaves.] 



folium, (7) Hisinger, 1837, (Prionotus 

 folium) Leth. Suec, Hud. Riv. Gr. 

 [Sig. a leaf or thin plate.] 



inutilis. Hall, 1865, Can. Org. Rem., Dec. 

 2, Quebec Gr. [Sig. not useful.] 



laciniatus, Emmons, 1856, Am. Geol., 

 Quebec Gr. [Sig. pointed, jagged.] 



marcidus. Hall, 1859, (Graptolithus mar- 

 cidus) Pal. N. Y., vol. 3, Hud. Riv. 

 Gr. [Sig. rotten, flagging, from the 

 shrunken stipe.] 



mucronatus. Hall, 1847, (Graptolithus 

 mucronatus) Pal. N. Y., vol. 1, Hud. 

 Riv. Gr. [Sig. sharp-pointed.] 



obliquus, Emmons, 1856, Am. Geol., Que- 

 bec Gr. [Sig. oblique.] 



peosta. Hall, 1861, (Graptolithus peosta) 

 Geo. Rep. Wis., Trenton Gr. [Ety. 

 proper name. (?)] 



pristiniformis. Hall, 1858, (Graptolithus 

 pristiniformis) Rep. of Progr. Can. 

 Sur., Quebec Gr. [Sig. an ancient 

 form.] This species is probably iden- 

 tical with Fiicoides dentata, Brongiart, 

 1828, Hist. Veg. Foss., vol. 1. 



pri.stis, (?) Hisinger, 1837, (Prionotus pris- 

 tis) Leth. Suec, Hud. Riv. Gr. [Sig. 

 a saw fish.] 



putillus, Hall, 1865, Can. Org. Rem., De- 

 cade 2, Hud. Riv. Gr. [Sig. a dwarf.] 



rugosus, Emmons, 1856, Am. Geol., Que- 

 bec Gr. [Sig. rugose.] 



rectangular! s, McCoy, 1854, Brit. Pal. 

 Rocks, Low. Sil. [Sig. rectangular.] 



secalinus, Eaton, 1847, (Fucoides secali- 

 nus) Pal. N. Y., vol. 1, Hud. Riv. Gr. 

 [Sig. resembling a small grain.] 



setaceus, Emmons, 1856, (Glossograpsus 

 setaceus) Am. Geol., Quebec Gr. [Sig. 

 hairy.] 



spinulosus. Hall, 1859, (Graptolithus spin- 

 ulosus) Pal. N. Y., vol. 3, Hud. Riv. 

 Gr. [Sig. full of little spines.] 



whitfieldi, Hall, 1859, (Graptolithus whit- 

 fieldi) Pal. N. Y., vol. 3, Hud. Riv. 

 Gr. [Ety. proper name.] 

 Diplophyllum, Hall, 1852, Pal. N. Y., vol. 2, 

 syn. for Diphyphyllum. 



caespitosum, see Diphyphyllum caespi- 

 tosum. 



coralliferum, see Diphyphyllum coralli- 

 ferum. 



DiscoPHVLLUM, Hall, 1847, Pal. N. Y.. vol. 1. 



[Ety. diikos, a disc; phylkrn, a leaf.] 

 peltatum. Hall, 1847, Pal. N. Y., vol. 1, 



Hud. Riv.Gr. [Sig. half-moon-shaped.] 

 DuxcAXELLA, Nicholson, 1874, Ann. Mag. 



Nat. Hist., 4th ser., vol. 13. [Ety. 



proper name.] 

 borealis, Nicholson, 1874, Ann. Mag. Nat. 



Hist., 4th ser., vol. 13, Niagara Gr. 



[Sig. belonging to northern latitudes.] 

 Emmoxsia, Edwards & Haime, 1851, Mono- 



graphie des Polyp., Foss. des Terr. 



Palaeoz. [Ety. proper name.] 

 hemispherica, Troost, 1840, (Calamopora 



hemispherioa) 5th Cxeo. Rep. Tenn., 



Corniferous Gr. (Sig. hemispherical.] 

 liemisphericn , Yandell & Shumard, 1847, 



(Favosites hemispherica) Contrib. to 



Geol. of Ky., Corniferous Gr. This 



species was first described by Troost, 



who gave the Falls of the Ohio as one 



of its localities. 



