Vol. 56.] FOSSIL CORALS AND BCHTNIDS OF SOMALILAND. 



27 



Pq 





I 





capped by purple grits, red 

 sandstones, and conglo- 

 merates. The more rugged 

 peaks of the coastal belt 

 are outliers of the Archsean 

 plateau ; but the main geo- 

 logical interest of this area 

 is due to the occurrence in 

 it of a series of limestones. 

 That the limestones belong 

 to more than one period was 

 obvious from the earliest 

 accounts of them. Thus 

 M. de Rochebrune, 1 who 

 in 1882 first described the 

 Somali limestones, identified 

 the fossils collected by 

 Revoil in the Singeli country 

 (lat. 11° N. & long. 49° E.) 

 as Neocomian ; and Miss 

 Raisin, 2 who six years later 

 gave an account of the spe- 

 cimens collected by Capt. 

 King at Mount Eilo, south 

 of Zeila (lat. 10° 30' N". & 

 long. 43° 35' E.), suggested, 

 on the evidence of the fora- 

 minifera, that the limestone 

 at that locality was late 

 Cretaceous or more probably 

 Kainozoic. 3 The fossils de- 

 scribed by M. de Rochebrune 

 were obtained in Eastern 

 Somaliland ; the limestone 

 described by Miss Raisin 

 came from the western part 

 of the Guban ; while the 

 Neocomian fossils described 

 by Prof. Mayer-Eymar s 



1 A. T. de Rochebrune, 'Obs. 

 geol. & pal. Region Comalis ' 

 Mission Revoil, Faune & Flore 

 des Pays Comalis, 1882 (pt. vii), 

 39 pp. & 4 pis. 



2 C. A. Raisin, ' Rock- speci- 

 mens fr. Somaliland ' Geol. Mag. 

 1888, p. 418. 



s C. Mayer-Eymar, ' Neocom. 

 Verst. Somali-Lands,' Viertel- 

 jahrsschr. naturf. Gresellsch. 

 Zurich, toI. xxxviii (1893) 

 pp. 249-65. 



