404 SUPPLEMENT FOR 1874. 



are mostly hidden by the Cretaceous. The base of the lignitic is the 

 *' Roche Percee," a hard nodular sandstone weathering into fantastic 

 shapes, and resembling the base of the Wyoming Lignitic. The thickest 

 coal-seam in the Souris valley is 7^ feet, in Porcupine Creek 18 feet. 

 The presence of Corhula indicates brackish as well as fresh water. The 

 lignite is prone to smoulder away in place. The series is most developed 

 in Montana Territory, extending to the Coteau de Missouri, proving the 

 former existence of forests in a now treeless region. Analyses of 

 lignite from Souris Yalley and Porcupine Creek are given. The 

 horizontality of the beds would enable the " long wall" system to be 

 adopted. The base of the Lignitic is Lowest Tertiary (Eocene), an ex- 

 tension of Hayden's Port Union group. E,. B. N. 



Delestre, E. A propos de la mer interieure en Algerie, ou fausse 

 interpretation geographique. [The Inland Algerian Sea.] Pp. 23. 

 Algiers. 



Desplace, — . Resistance des pierres a I'ecrasement. [Crushing 

 Resistance of Stone.] Bull. Soc. Sci. Indust. Marseille^ t. i. 

 pp. 189-204. 



Account of experiments, made in 1845, on 88 kinds of stone. 



Dewalque, G. Quelques notes sur le sondage Menin. [Boring at 



Menin.] Ann. Soc. Geol. Belg. t. i. Bull. pp. Ixxv, Ixxvi. 

 Cretaceous on Silurian ? 



Compte Rendu de la Reunion Extraordinaire de 1874 tenue 



a Marche du 4 au 6 Octobre. [Excursion at Marche.] Ann. Soc. 

 Geol. Belg. t. i. Bull. pp. Ixxviii-xcv. 

 Details of ground traversed (Cambrian, Silurian, and Devonian). 



Doering, Dr. Ad. Studien iiber die chemischen und physikalischen 

 Verhaltnisse des Bodens der Pampa-Eormation. [Chemical and 

 Physical Composition of the Soil of the Pampas.] La Plata 

 Monatsschrift, no. 8, pp. 113-119. 



Eisen, Gustaf. Om foglars formaga att bidraga till sammanbland- 

 ning af fossilforande jordlag. (Efv. K. Vet. Akad. Fork. Arg. 31, 

 no. 7, pp. 17-21, pi. vii. (section). 



Refers to San Pedro, California. 



Elliot, Prof. J. Geology of the Hawick District. Proc. Berwick. 



Field Club, vol. vii. no. 1, pp. 71-74. 

 In Teviotdale above and for 4 miles below Hawick the rocks are 

 Silurian ; Old Red Sandstone occurs lower down the vaUey. The hills 

 are capped by basalt, and the district is traversed by basaltic dykes. 



W. T. 



Feistmantel, Karl. Die Steinkohlenbecken bei Klein- Prilep, Lisek, 

 Stilec, Holoubkau, Mireschau und Lelkow. [Coal- basins, Bohemia.] 



