WRITINGS OF JULES MARCOU. 243 



Page. 

 Construction of the Geological map of tlie United States and the British Provinces ; 

 Criticisms of the American Journal of Science and Arts, conducted by Professors 



B. Silliman, B. Silliman, jr., and James D. Dana 85-98 



A synopsis of the history of the progress and discoveries of Geology in North America. 99-121 



List of maps and memoirs on the Geology of North America 122-143 



Note 144 



PALEONTOLOGY. 

 FOSSILS OF THE TEKTIARY ROCKS. 



Ostrea virginica var. californica, Marcou, 1858, pi. v, figs. 2, 2a 32-33 



FOSSILS OF THE CRETACEOUS ROCKS. 



Ptychodun wkipplei, n. s., Marcou, 1858, pi. i, figs. 4, 4a 33 



Ammonites shionardi, n. s., Marcou, 1858, pi. i, figs. 1, 1 a 33-34 



Amm,onitei! belknapii, n. s., Marcou, 1858, pi. ii, figs. 1 a, 1 6 34 



Ammonites peruvianus, de Buch., pi. v, figs. 1, 1 a, 1 6 34-35 



Ammonites gibbonianus, Lea, pi. ii, fig. 2«, 26 35 



A inmonites not'i-mexicana, n. s., Marcou, 1858, pi. i, figs. 2, 2 a 35-36 



Hamites fremonti, n s., Marcou, 18.58, pi. i, fig. 3 36 



Inoceramus leroxixi, n. s., Marcou, 185S, pi. ii, fig. 3 36-37 



Isoeardia washita, n. s., Marcou, 1858, pi. iii, figs. 2, 2 a, 2 6 37 c 



Gryphcea sinuata var. americana, Marcou, 1858, pi. iii, flg. 1 37-38 



Oryphcea pitckeri, Morton, pi. iv, figs. 5, 5 a, 6, and 6. 1 38-40 



Holaster comanchesi, u. s., Marcou, 1858, pi. iii, figs. 3, 3 a 40-41 



Exogyra fiabellata, Goldf 41-42 



Cytherea missouriana, Mort 42 



Tellina occidenlnlis, Mort .-. 42 



Gapratinn texana, Eoem 42 



FOSSILS OK THE JURASSIC ROCKS. 



Gryphcea dilatata var. tueumcarii, Marcou, 1858, pi. i v, figs. 1, 1 a, 1, 2, 3 43 



Ostrea marshii, Sow., pi iv, fig. 4 43-44 



FOSSILS OF THE MOUNTAIN LIMESTONE OR LOWER CARBONIFEROUS BOCKS. 



Orthoceras nDua-mexicana, n. s., Marcou, IS.iB, pi. vii, fig. 1 44 



Myalina apachesi, n. s., Marcou, 1858, pi. vii, figs. 6, 6 re 44-45 



Productus delawnrii, u. s. , Marcou, 1858, pi. v, fig. 3 45 



Prodiictus cora, d'Orb., ])1. vi, figs. 4, 4 « 45 



Productus cora var. inognyoni, Marcou, 1858, pi. vi, fig. 5 4.5-46 



Productus se.mi-rccticulatus, Mart., pi. v, figs. 4, 4 a, pi. vi, flg. 6 46 



Productus costatus, Sow. , pi. v, fig. 5 • 46-47 



Productus fleiningil. Sow., pi. vi, flg. 7 47 



Productus scabrtculiis, Mart., pi. v, figs. 6, 6 a 47-48 



Productus pyxidiformis, do Kon. , pi. vi, flgs. 3, 3 a 48 



Productus pustulosus, Phill., pi. vi, flg. 1 48 



Productus punctatus. Mart., pi. vi, fig. 2 48 



Orthis pecosii, n. h., Marcou, 1858, pi. vi, flgs. 14, 14 «, 6 48-49 



Orthis cre7iistria, Pliill 49 



Spirifer striatus, Mai t., pi. vii, fig.s. 2, 2 a 49 



Spiri/er striatus var. triplicatus, Marcou, 1858, pi. vii, fig. 3 49, 50 



Spirifer rocky-montani, n. s., Marcou, 1858, pi, vii, flgs. 4, 4 a-e 50 



Spirifer lineatus, Mart., pi. vii, flgs. 5, 5 re-c 50 



Terebratula rocky-montana, n. s., Marcou, 18.58, pi. vi, flgs. 13, 13a-c 50-51 



Terebratula mormonii, n. s., Marcou, 1858, pi. vi, flgs. 11, 11 a-c 51 



Terebratula uta, n. s., Marcou, 1858, pi. vi, figs. 12, 12 a-c 51 



Terebratula royssii, Leveill6, pi. vi, flgs. 10, 10 a, 6 51-52 



Terebratula piano -sulcata, Phill., pi. vi, figs. 8, 8 a-b 52 



Terebratula subtilita, Hall, pi. vi, figs. 9, 9 a-f 52 



Zaphrentis stansburyi, Hall, pi. vii, flg. 7 52-53 



Zaphrentis cylindrica, Milne-Edwards & Jules Haime, pi. vii, fig. 8 53 



Amplexus coralloides ? Sow 53 



