LAMELLIBRANCHIATA. 



197 



recurvirostris, Meek & Worthen, 1860, 



Proc. Acad. Nat. Sci. Phil., Up. Coal 



Meas. [Sig. beaked, recurved.] 

 squamosa, Sowerby, 1827, Trans. Geo. 



Soc. Lond., 2d ser., vol. 3, Permian 



Gr. [Sig. rough, scaly.] 

 subquadrata, Shumard, 1855, Geo. Rep. 



Mo., Coal Meas. [Sig. somewhat qua- 

 drate.] 

 St. ludovici, Worthen, 1873, Geo. Sur. 111., 



vol. 5, St. Louis Gr. [Ety. proper 



name; Sanctug Ludovicus, St. Louis.] 

 swallovi, McChesney, 1860, New Pal. 



Fobs. , Coal Meas. [Ety. proper name.] 

 Mytilakca, Hall, 1870, Prelim. Notice Lam. 



shells. [Ety. from the two genera 



Mytilus and Arca.'\ 

 arenacea. Hall, 1870, Prelim. Notice Lam. 



shells, Schoharie grit. [Sig. sandy.] 

 attenuata, Hall, 1870, Prelim. Notice 



Lam. shells, Chemung Gr. [Sig. 



elongated.] 

 canadensis, Billings, 1874, Pal. Foss., vol. 



2, Devonian. [Ety. proper name.] 

 carinata, Hall, 1877, Pal. N. Y., vol. 5, 



Chemung Gr. [Sig. carinated.] 

 chemungensis, Conrad, 1842, (Inoceramus 



chemungensis) Jour. Acad. Nat. Sci. 



Phil., vol. 8, Chemung Gr. [Ety. 



proper name.] 

 cordiformis, Hall, 1859, (Megambonia cor- 



diformis) Pal. N. Y., vol. 3, Low. Held. 



Gr. [Sig. heart-shaped.] 

 flbristriata, White & Whitfield, 1862, 



(Mytilus fibristriatus) Proc. Bost. Soc. 



Nat. Hist, Kinderhook Gr. [Sig. 



fibre-lined.] 

 mytilimeris, Conrad, 1842, (Inoceramus 

 ' mytilimeris) Jour. Acad. Nat. Sci., 



vol. 8, Low. Held. Gr. [Ety. Mytilus 



a genus of shells; meros, a part.] 

 nitida, Billings, 1874, Pal. Foss., vol. 2, 



Devonian. [Sig. neat, pretty.] 

 occidentalis. White & Whitfield, 1862, 



(Mytilus occidentalis) Proc. Bost. Soc. 



Nat. Hist., vol. 8, Kinderhook Gr. 



[Sig. western.] 

 oviformis, Conrad, 1842, (Inoceramus 



oviformis) Jour. Acad. Nat. Sci., vol. 



8, Ham. Gr. [Sig. egg-shaped.] 

 ponderosa. Hall, 1870, Prelim. Notice 



Lam. shells. Up. Held. Gr. [Sig. large, 



heavy.] 

 radiata, Hall, 1877, Pal. N. Y., vol. 5, 



Chemung Gr. [Sig. radiated.] 

 sigillum. Hall, 1876, 28th Reg. Rep., Niag- 

 ara Gr. [Sig. a seal.] 

 triquetra, Conrad, 1838, (Pterinea tri- 



quetra) Ann. Rep. N. Y., Ham. Gr. 



[Sig. a triangle.] 

 Mytilus, Linnajus, 1758, Syst. fTat., 10th ed. 



[Ety. MytUus, the fish mussel.] This 



genus does not, so far as known, ex- 

 ist in pateozoic rocks. Most of the 



species referred to it belong to the 



genus Myalina. 



concavus, Swallow, 1858, Trans. St. Louis 



Acad. Sci., Permian Gr. [Sig. con- 

 cave.] 

 fibristratus, see Mytilarca flbristriata. 

 occidentalis, see Mytilarca occidentalis. 

 ottawensis, Shumard, 1858, Trans. St. 



Louis Acad. Sci., Up. Coal Meas. 



[Ety. proper name.] 

 permianui, see Myalina permiana. 

 squamosus, Sowerby, 1839, Trans. Geol. 



Soc. Lend., vol. 4, Permian Gr. [Sig. 



rough, scaly.] 

 tenuiradiatus, Shumard, 1858, Tmns. St. 



Louis Acad. Sci., Up. Coal Meas. [Sig. 



slender-rayed.] 

 whitfleldanus, Winchell, 1862, Proc. 



Acad. Nat. Sci., Marshall Gr. [Ety. 



proper name.] Prof. Hall suggests 



that this is a syn. for Mytilarca fibris- 



triata. 

 Naiadites, Dawson, 1860, Acad. Geol., but 



not defined. The name was used for 



a genus of plants by Buckman in 



1843. The fossils were defined by 



Salter in 1861, under the name of 



Anthracomya. 

 angulaia, see Anthracomya angulata. 

 armaceus, see A. arenacea. 

 carbonarius, see A. carbonaria. 

 elongata, see A. elongata. 

 Ixvis, see A. Isevis. 

 obtrisa, see A. obtusa. 

 ovalis, see A. ovalis. 

 NucuLA, Lamarck, 1815, Hist. Nat. des An. 



sans Vert. [Ety. nuaila, a little nut.] 

 anodontoides. Meek, 1871, Reg. Rep. Uni- 

 versity W. Va., Coal Meas. [Sig. like 



an Anodonta.] 

 arata. Hall, 1852, Stansbury's Ex. to Gr. 



Salt Lake, Coal Meas. [Sig. furrowed.] 

 bellaiula, syn. for N. bellistriata. 

 bellistriata, Conrad, 1841, (Nuculites 



bellistriatus) Ann. Rep. N. Y., Ham. 



Gr. [Sig. beautifully striated.] 

 beyrichia, Schlotheim, as identified by 



Geinitz. See Nucula parva. 

 corbuliformis, Hall, 1870, Prelim. Notice 



Lam. shells, Ham. & Chemung Gr. 



[Sig. resembling a Corbula.] 

 cylindricus, syn. for Cardiomorpha mis- 



souriensis. 

 donaciformis see Tellinomya donaciformis. 

 fabula, see Cleidophorus fabula. 

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



Gr. [Sig. gaping.] 

 houghtoni, Stevens, 1858, Am. Jour. Sci., 



vol. 25, Coal Meas. [Ety. proper 



name.] 

 hubbardi, Winchell, 1862, Proc. Acad 



Nat. Sci., Marshall Gr. Syn. for Nu 



culites sulcatinus. 

 iowensis, White & Whitfield, 1862, Proc, 



Acad. Nat. Sci., Marshall Gr. [Ety, 



proper name.] 

 hazanemm, as identified by Geinitz is Nu 



culana bellistriata. 

 hvata, see Tellinomya levata. 

 lineata, see Tellinomya lineata. 



