146 GEOLOGY. 



[Excursion from Gaboon up the River Como.] Yerh. k.-k. geol. 

 Eeiclis. pp. 319-321. 

 Lenz, Dr. OsKAR. Reisen in West-Afrika. [Journeys in West Africa.] 



Verh. k.-k. geol. Eeiclis. pp. 363, 364. 



Lesseps, Ferdinand de. Communication sur les lacs amers de 



I'isthme de Suez. [Bitter Lakes of Suez.] Compt. Rend. t. Ixxviii. 



pp. 1740-1748. 



Shows that eleven centuries ago the mean level of the Red Sea was 



about three metres higher than now, and that then the rising of the 



land had been going on for a long time. Describes the great bed of 



salt in the middle of the great basin of the Bitter Lakes, which consists 



of a number of horizontal beds of salt, from 8 to 10 centimetres 



thick, divided by thin films of sand. Each bed of salt, in the author's 



opinion, represents the time which elapsed (after the obstruction of 



the two branches of the ancient canal of communication mentioned 



by Herodotus) between each exceptionally high tide of the Red Sea, 



when the influx of comparatively fresh water for a time stopped the 



formation of the deposits. Tables are given showing the evaporation 



going on in the Bitter Lakes, the velocity of the currents in the Suez 



Canal, the area and capacity of the lakes, and the volume of the 



salt-beds. G. A. L. 



Matjpas, E. Note sur la moraine terminale d'un ancien glacier 



trouvee dans le ravin de I'Oued El-Kebir (Blida). [Terminal 



Moraine of an old Glacier in the Ravine of Oued El-Kebir.] BuU. 



Soc. Clim. Alger. 



Maw, George. Geological Notes on a Journey from Algiers to the 



Sahara. Quart. Journ. Geol. Soc. vol. xxx. pp. 105-122, 



pi. ix. and 5 figs. 



The rocks noticed are : — 1. Micaceous schists and gneiss ; 2. Rocks 



of the Lower Atlas, age unknown, but underlying Neocomian beds ; 3. 



Sandstones of Guelt-el-Stel and Sidi Makhelouf (Triassic?); 4. 



Saliferous Marls (Keuper ?) ; 5. Red and green marls (age ?) ; 6. 



Grey marls of Hants Plateaux (age?); 7. Eossiliferous beds of 



L'Aghouat, Miocene ; 8. Tertiary Beds of the TeU and Algiers ; 9. 



Post-Tertiary deposits. The author gives a summary of his views as 



to the succession of events and changes of level. G. A. L. 



Milne, John. Geological Notes from the Neighbourhood of Cairo. 



Geol. Mag. dec. 2, vol. i. pp. 353-362, 3 figs, in text. 

 Written to accompany some specimens now in the British Museum, 

 The rubbish-mounds outside Cairo are noticed, as well as the great Moc- 

 cattam quarries in Nummulitic limestone, with a N.E. dip beneath the 

 red quartzose hills. The general succession of the beds from the 

 summit of the hills behind the citadel is given, with notes on the red 

 quartzose range of Jebel Achmar and on the geological features of the 

 road leading to the so-called " Petrified Forest.'' G. A. L. 



PoMEL, A. Sur la pretendue mer Saharienne. [The aUeged 



Saharan sea.] Compt. Rend. t. Ixxix. pp. 792-794. 

 Asserts that in his work on the Sahara (1872) he sufiiciently proved 

 the non-existence of an old Sahara sea. By his reading of the word 



