CEPHALOPODA. 



typica, Billings, 1865, Pal. Foss., Black 



Riv. Gr. [Sig. type of the genus.] 

 Diplockras, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8. [Ety. diploos, double; 



keras, horn.] 

 vanuxemi, Conrad, 1842, Jour. Acad. 



Nat. Sci., vol. 8, Trenton Gr. [Ety. 



proper name.] 

 Discites, DeHaan, 1825, Mongr. Amnion., 



etc. [Ety. diskos, a quoit.] 

 disciformis, Meek & Worthen, 1865, Proc. 



Acad. Nat. Sci. Phil., Keokuk Gr. 



[Sig. in the shape of a quoit.] 

 highlandensis, Worthen, 1875, Geo. Sur. 



111., vol. 6, Coal Meas. [Ety. proper 



name.] 

 ornatus, syn. for Nautilus marcellensis. 

 tuberculatus, Owen, 1852, Geo. Sur. Wis., 



Iowa and Minn., Low. Carb. [Sig. 



covered with tubercles.] 

 Discosorus, Hall, 1852, Pal. N. ¥., vol. 2. 



[Ety. diskos, a quoit; sows, a heap or 



pile.] 

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



Clinton & Niagara Gr. [Sig. conical.] 

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



[Ety. eridos, within; keras, horn.] 



This genus seems to be founded upon 



the same fossils that Conrad previ- 

 ously founded his genus Diploceras 



upon, 

 angusticameratum, Hall, 1847, Pal. N.Y., 



vol. 1, Trenton Gr. [Sig. narrow- 

 chambered.] 

 annulatum, Hall, 1847, Pal. N. Y., vol. 



1, Trenton Gr. [Sig. ringed.] 

 approximatum, Hall, 1847, Pal. N. Y., 



vol. 1, Trenton Gr. [Sig. approximat- 

 ing-] 

 arctiventrum, Hall, 1847, Pal. N. Y., vol. 



1, Trenton Gr. [Ety. arctus, close; 



venter, a cavity.] 

 atlanticum, Barrande, 1869, Syst. Sil. de 



Boh., 2d ser., 4me, Quebec Gr. [Sig. 



Atlantic] 

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



Trenton Gr. [Sig. distant.] 

 duplicatum, Hall, 1847, Pal. N. Y., vol. 



1, Trenton Gr. [Sig. doubled.] 

 gemelliparum, Hall, 1847, Pal. N. Y., vol. 



1, Black Riv. Gr. [Sig. twins, in allu- 

 sion to the two embryo-tubes enclosed 



within the siphuncle.] 

 insulare, Barrande, 1869, Syst. Sil. de 



Boh., 2d ser., 4me, Quebec Gr. [Sig. 



belonging to an island.] 

 lativentrum, Hall, 1850, 3rd Reg. Rep. 



N. Y., Trenton Gr. [Ety. lotus, broad ; 



venter, cavity.] 

 longissimum, Hall, 1847, Pal. N. Y., vol. 



1, Black Riv. & Trenton Gr. [Sig. 



of unusual length.] 

 magniventrum, Hall, 1847, Pal. <S. Y., 



vol. 1, Trenton Gr. [Ety. magnus, 



large ; venter, cavity.] 

 marcoui, Barrande, 1869, Syst. Sil. de 



Boh., 2d ser., 4me, Quebec Gr. [Ety. 



proper name.] 



multitubulatum, Hall, 1847, Pal. N. Y., 



vol. 1, Black Riv. & Trenton Gr. [Sig. 



having manv pipes.] 

 proteiforme, Hall, 1847, Pal. N. Y., vol. 



1, Hud. Riv. and Trenton Gr. [Sig. 



having many shapes.] 

 proteiforme var. elongatum, Hall, 1847, 



Pal. N. Y., vol. 1, Trenton Gr. [Sig. 



lengthened.] 

 proteiforme var. lineolatum, Hall, 1847, 



Pal. N. Y., vol. 1, Trenton Gr. [Sig. 



marked with fine lines.] 

 proteiforme var. strangulatum, Hall, 1847, 



Pal. N. Y., vol. 1, Trenton Gr. [Sig. 



constricted.] 

 proteiforme var. tenuistriatum, Hall, 1847, 



Pal. N. Y., vol. 1, Trenton Gr. [Sig. 



fine-lined.] 

 proteiforme var. tenuitextum, Hall, 1847, 



Pal. N. Y., vol. 1, Trenton Gr. [Sig. 



finely woven.] 

 rapax, Billings, 1860, (Orthoceras rapax) 



Can. Nat. & Geol., vol. 5, Black Riv. 



Gr. [Sig. ravenous.] 

 rottermundi, Barrande, 1866, (Orthoceras 



rottermundi) S3'st. Sil. de Boh., 2d 



ser., 2me, Trenton Gr. [Ety. proper 



name.] 

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



Black Riv. Gr. [Sig. nearly central.] 

 Endolobus, Meek & Worthen, 18 65, Proc. 



Acad. Nat, Sci. Phil. [Ety. endos, 



within; lobos, a lobe.] Prof. Meek 



said later that this genus is not distinct 



from TemnocJieilus, and if distinct it 



would probably be a synonym for 



Montfort's genus Bisiphites. 

 peramplus, see Temnocheilus peramplum. 

 spectabUis, see Temnocheilus spectabile. 

 Glossoceras, Barrande, 1865, Cephalopoda 



of Bohemia, vol. 2. [Ety. glosse, the 



tongue ; keras, a horn.] 

 desideratum, Billings, 1866, Catal. Sil. 



Foss. Antic, Clinton Gr. [Sig. rare.] 

 Gomphoceras, Sowerby, 1839, Murch. Sil. 



Syst. [Ety. gomplios, a club ; keras, a 



horn.] 

 beta, see Cyrtoceras beta. 

 conradi, see Cyrtoceras conradi. 

 eos, Hall & Whitfield. 1875, Ohio Pal., 



vol. 2, Cin'ti Gr. [Sig. the dawn.] 

 eximium, Hall, 1861, 14th Reg. Rep., Up. 



Held. Gr. [Sig. choice, unparalleled.] 

 fischeri, Hall, 1860, 13th Reg. Rep., Ham. 



Gr. [Ety. proper name.] 

 marcyse, Winchell & Marcy, 1865, Mem. 



Bost. Soc Nat. Hist., Niagara Gr. 



Syn. for G. scrinium. 

 obesum, Billings, 1857, Rep. of Progr., 



Utica Gr. [Sig. plump in form.] 

 omicron, Winchell, 1866, Rep. Low. Pen- 

 insula Mich., Ham. Gr. [Ety. a letter 



of the Greek alphabet.] 

 oviforme, Hall, 1860, 13th Reg. Rep. 



N. Y., Ham. Gr. [Sig. egg-shaped.] 

 saccidum, see Cvrtoceras sacculum. 

 scrinium, Hall, 1864, 20th, Reg. Rep. 



N. Y., Niagara Gr. [Sig. a casket.] 



