310 The Upper Cretaceous Floras of the World 



are other scattered references to the Mesozoic flora too unimportant for 

 enumeration in the present connection.' 



Upper Cretaceous Alu.k 



Giimbel." Steinmann," Rothpletz/ and other students 3 have described 

 numerous remains of calcareous and other algae with more or less of their 

 structure preserved from marine beds at various horizons in the Upper 

 Cretaceous. Since these papers usually contain material from widely 

 scattered localities it is not usually feasible to cite them by areas, although 

 a few of them arc mentioned. They are not incorporated in detail in the 

 foregoing discussion for the reason cited above, and also because their 

 study has heretofore been a special field but little cultivated by either 

 botanists or paleobotanists and is as yet in its infancy, although promis- 

 ing results of immense value. 



1 The writer has been unable to consult Nowak, J., Kopalna flora senonska 

 z. Potylicza. Krakow, 1907. 



2 Giimbel, C. W., Geognostische Beschreibung des bayerischen Alpengebirges 

 und seines Vorlandes., pp. 1-950, pis. i-xlii, Gotha, 1861. 



Die sogenannten Nulliporen (Lithothamnium und Dactylopora) und 



ihre Betheiligung an der Zusammensetzung der Kalkgesteine. Abh. k. Akad. 

 Wiss. Munchen. Bd. xi, pt. i, 1871, pp. 11-52, 232-290, pis. i, ii, Di-Div. 



Vorlanfige Mittheilung iiber Flyschalgen. Neues Jahr. Bd. i, 1896, 



pp. 227-232. 



3 Steinmann, G., Zur Kenntniss fossiler Kalkalgen (Siphonean) Neues 

 Jahrb., Bd. ii, 1880, pp. 130-140, pi. v. 



Ueber fossile Dasycladaceen vom Cerro Escamela. Beitr. Geol. Pal- 



aont. Republ. Mexico von Felix and Leuk, Ab. ii, 1899, pp. 189-204, tf. 



Ueber Bouei'na, eine fossile Alge aus der Familie der Codiaceen. 



Bericht. naturf. Gesell. Freiburg. Bd. xi, 1901, pp. 62-72, tf. 1-13. 



4 Rothpletz, A., Das Verhaltniss der fessilen zu den lebenden Lithotham- 

 nium-Arten. Bot. Centralblatt, Bd. xlv, 1891, pp. 235, 236. 



Fossile Kalkalgen aus den Familien der Codiaceen und der Coral- 



lineen. Zeits. deutsch, geol. Gesell. Bd. xliii, 1891, pp. 295-332, pis. xv-xvii. 



Ueber die Flysch-Fucoiden und einige andere fossile Algen sowie 



iiber laisische Diatomeen-fiihrende Hornschwamme. Ibidem, Bd. xlviii, 1896, 

 pp. 854-914, pis. xxii, xxiv. 



5 Martin, K., Lithothamnium in cretaceischen und jiingeren Ablagerungen 

 tropischer Inseln. Centralblatt f. Mineral 1901, pp. 161-165. 



Stopes, M. C, Catalogue of Cretaceous Plants in British Museum (Na 

 Hist.), pt. i, 1913. 



