362 



BRACHIOPODA. 



[PHO PRO. 



nysius, Hall & Whitfield, 1872, 24th Rep. 



N. Y. St. Mue. Nat. Hist., p. 184, Niag- 

 ara Gr. There are two varieties, one 



having coarse and the other finer 



radii. These are designated P. nysius 



var. crassicostus and P. nysius var. 



tenuicostus. 

 oblongus, Sowerby, 1839, Murch. Sil. 



Syst., p. 641, and Pal. N. Y., vol. 2, p. 



79, Clinton and Niagara Gr. 

 oblongus var. cylindricus, Hall & Whit- 

 field, 1872, 24th Rep. N. Y. St. Mus. 



Nat. Hist., p. 183, Niagara Gr. 

 occidentalis, Hall, 1852, Pal. N. Y., vol. 



2, p. 341, Guelph Gr. 

 occidentalis, see Gypidula occidentalis. 

 ovalis, Hall, 1852, Pal. N. Y., vol. 2, p. 



103, Clinton Gr. 

 papilionensis, see Pentamerella papilion- 



ensis. 

 pergibbosus, Hall & Whitfield, 1875, Ohio 



Pal., vol. 2, p. 139, Niagara Gr. 

 peeovis, Whitfield, 1882, Desc. New Spec. 



Foss., from Ohio, p. 195, Low. Held. Gr. 

 pseudogaleatus, Hall, 1857, 10th. Rep. 



N. Y. St. Mus. Nat. Hist., p. 106, and 



Pal. N. Y., vol. 3, p. 259, Low. Held. Gr. 

 reverms, see Anastrophia reversa. 

 salinensis, Swallow, 1860, Trans. St. Louis 



Acad. Sci., vol. 1, p. 652, Devonian, 

 similior, Winchell & Marcy, 1865, (Spirif- 



era similior,) Mem. 



Bost. Soc. Nat. Hist., 



p. 93, Niagara Gr. 

 subglobosus, Meek & 



Worthen, 1868, Geo. 



Sur. 111., vol. 3, p. 



429, Ham. Gr. 

 trisinuatus, McChes- 



ney 1861 Desc. New FIG. 598. Porambonites ottawensis. n, b, c, d, Different views; e, in- 



Pal ffnaa eft terior of ventral valve ; /, interior of dorsal valve ; g, showing oral 



rai. J 088., p. so, arms 



Niagara Gr. 

 ventricosus, Hall, 1861, Rep. Progr. Wis. 



linguloides, Hall, 1867, Pal. N. Y., vol. 4, 



p. 414, Ham. Gr. 

 oblata, Hall, 1867, Pal. N. Y., vol. 4, p. 



414, Ham. Gr. 

 ovalis, Hall, 1863, Trans. Alb. Inst., vol. 



4, p. 209, Niagara Gr. 

 ovata, Hall, 1859, Pal. N. Y., vol. 3, p. 



490, Low. Held. Gr. 

 quadrangularis, Walcott, 1885, Monogr. 



U. S. Geo. Sur., vol. 8, p. 114, Devonian, 

 squamiformis, Hall, 1843, (Orbicula squa- 



miformis,) Geo. Rep. 4th Dist. N. Y., 



p. 108, and Pal. N. Y., vol. 2, p. 250, 



Niagara Gr. 

 subtruncata, Hall, 1847, (Orbicula sub- 



truncata,) Pal. N. Y., vol. 1, p. 290, 



Hud. Riv. Gr. 

 terminalis, Hall, 1859, Pal. N. Y., vol. 3, 



p. 490, Oriskany sandstone, 

 trentonensis, Hall, 1866, 24th Rep. N. Y. 



St. Mus. Nat. Hist., p. 221, Trenton Gr. 

 Platystrophia, King, syn. for Orthis. 



regularis, syn. for Orthis lynx. 

 Plectambonites area, syn. for Leptana trans- 

 versal is. 



glabra, syn. for Leptsena sericea. 

 tenera, syn. for Leptsena transversalis. 

 Plicatula, Lamarck, 1809. Not Palaeozoic. 

 striatocostata, see Meekella striatocostata. 

 PORAMBONITES, Pander, 1830, Beitrage zur 



Geog. des Russichen Reiches, p. 99. 



Sur., p. 2, and 20th Rep. N. Y. St. Mus. 

 Nat. Hist., p. 374, Niagara Gr. 

 verneuili, see Anastrophia verneuili. 

 PHOLIDOPS. Hall, 1859, Pal. N. Y., vol. 3, p. 

 489. [Etv. pholis, pholidos, a scale.] 

 Small, thin, subelliptical, inequivalve ; 

 apex excentric, foramen in front of the 

 apex of the ventral valve ; surlace marked 

 by concentric lamellae of growth ; dorsal 

 valve marked with bilobed muscular 

 impressions. Type P. squamiformis. 

 arenaria, Hall, 1867, Pal. N. Y., vol. 4, p. 



413, Oriskany sandstone. 

 areolata, Hall, 1863, 16th Rep. N. Y. Mus. 



Nat. Hist., p. 31, Schoharie grit. 

 bellula, Walcott, 1885, Monogr. U. S. Geo. 

 Sur., vol. 8, p. 113, De- 

 vonian. 



cincinnatiensis, Hall, 1872, 

 24th Rep. N. Y. St. Mus. 

 Nat. Hist., pi. 7, fig. 10, 

 Hud. Riv. Gr. 



cinn P a S tiensi n s hamiltoniw, Hall, 1860, 13th 

 cinnatienais. Rep N ^ ^ ' Mug j ^ 



Hist. p. 92, and Pal. N. Y., vol. 4, p. 

 32, Ham. Gr. 



t 



FIG. 597,-Plio- 



[Ety. poros, opening ; ainbon, umbone.] 

 Subglobose, depressed, dorsal valve the 

 larger, beaks obtuse, subequal, sepa- 

 rated by a small cardinal area in each 

 valve ; foramen in each valve small, 

 triangular, reaching the hinge-line ; 

 two long, slightly diverging dental la- 

 mella; in each valve, those of the ven- 

 tral valve closer together; surface 

 coarsely punctured in lines. Type P. 

 aequirostris. 



dentatm, see Orthis dentata. 



obscurus, Hall & Whitfield, 1877, U. S. 

 Geo. Expl. 40th parallel, vol. 4, p. 234, 

 Quebec Gr. 



ottawensis, Billings, 1862, Pal. Foss., vol. 



1,3>. 140, Black Riv. Gr. 

 PRODUCTELLA, Hall, 1867, Pal. N. Y., vol. 4, 

 p. 153. [Sig. diminutive of Productus.~] 

 Shells having the general form of Pro- 

 ductus, but with a narrow area on each 

 valve, a foramen or callosity on the 

 ventral area, small teeth, and more or 

 less distinct teeth sockets. Type P. 

 subaculeata. 



arctirostrata, Hall, 1857, (Productus arcti- 

 rostratus,) 10th Rep. N. Y. St. Mus. 



