WRITINGS OF JULES MARCOU. 243 



Paga 

 Construction of the Geolofcical map of tlie TTnited 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 THK TERTIARY ROCKS. 



Ostrea virginica var. calif ornica, Marcou, 1858, pi. v, figs. 2, 2 « 32-33 



FOSSILS OF THE CRETACEOUS ROCKS. 



Ptychodug whipplei, n. s., Marcou, 1858, pi. i, tigs. 4, 4 a 33 



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



A7nmonites belknapii, n. s., Marcou, 18i58, pi. ii, figs. 1 a, 1 6 34 



Ammonites peruviamis, de Buch., pi. v, figs. 1, la, lb 34-35 



Ammonites gibbonianus, Lea, pi. ii, fig. 2 a, 2 6 35 



Ammonites nooi-mexicana, n. s., Marcou, 1858, pi. i, figs. 2, 2 a 35-36 



Samites freinonti, n s., Marcou, 18.58, pi. i, fig. 3 36 



Inoceramus lerouxi, n. s., Marcou, 1858, pi. ii, fig. 3 36-37 



Isoeardia wash! fa, n. s., Marcou, 1858, pi. iii, figs. 2, 2 a, 2 6 37 



Oryphcea fdnuata var. americana, Marcou, 1858, pi. iii, fig. 1 37-38 



Oryphcea pitcheri, Morton, pi. iv, figs. 5, 5 a, b, and 6 38-40 



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



Exogyra flabellata, Goldf 41-42 



Cytherea migsouriana, Mort 42 



Tellina occidentalis, Mort 42 



Caprotina texana, lioeui 42 



FOSSILS OF THp; JURASSIC ROCKS. 



Gryphcea dilatata var. tucumcarii, Marcou, 1858, pi. iv, figs. 1, 1 a, 1, 2, 3 43 



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



FOSSILS OF THE MOUKTALM LIMESTONE OR LOWER CARBONIFEROUS ROCBK. 



Orthoceras nova-mexicana, n. s., Marcou, 1858, pi. vii, fig. 1 44 



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



I'roductus delawarii, n. s., Marcou, 1858, pi. v, fig. 3 45 



Prodvctus Cora, d'Orb., pi. vi, figs. 4, 4 « 45 



Prnductits cora xav. viogayoni, Marcou, 1858, pi. vi, fig. 5 45-46 



Productus sewirecticulatvs. Mart., pi. v, figs. 4, 4 a, pi. vi, fig. 6 46 



Productiis costafus,i>osv. ,\)l.\', fin;, 5 46-47 



Productus Jletiiingii, Sow., pi. \ i, fig. 7 47 



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



Productus pyxidiformis. de Kon., pi. vi, figs. 3, 3 a 48 



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



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



Orthis pecosii. n. s., Marcou, 1858, pi. vi, figs. 14, 14 a, 6 48-49 



Orthis crenistria, Phill 49 



Spirifer striatus. Mart., pi. vii, fig.s. 2, 2 a 49 



Spirlfcr striatus var. triplicatus, Marcou, 1858, pi. vii, fig. 3 49, 50 



Spirlfcr rocky- montani, n. s., Marcou, 1858, \A, vii, figs. 4, 4 rt-€ 50 



Spirifer Uneatus, Mart., pi. vii, figs. 5, 5 a-c 50 



Terebratula rocky-montana, n. s., Marcou, 1858, pi. vi, figs. 13, 13 a-c 50-51 



Terebratula marmonii, n. s., Marcou, 1858, pi. vi, figs. 11, llo-c 51 



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



Terebratula royssii, L6veill6, pi. vi, figs. 10, 10 a, 6 51-52 



Terebratula piano- sulcata, Phill., pi. vi, figs. 8, 8 a-6 52 



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



Zaphrentis stansburyi, Hall, pi. vii, fig. 7 62-53 



Zaphrentis cylindrica, MUne-Ed wards & Jules Haime, pi. vii, fig. 8 53 



Atnplexus coralloides ? Sow 53 



