Yol. 56.] FOSSIL CORALS AND ECHINIDS OF SOMALILAND. 43 



Belemnopsis sulcata. The Parallelodon, according to Mr. Newton, 

 suggested a slightly older date, for he described it as identical 

 with a specimen from the Niti Beds, where it is associated with 

 Parkinsonia ParJcinsoni. The Bihendula Limestones were accordingly 

 suggested to be of Bathonian age ; but with the larger collection 

 now available it seems probable, from the cephalopoda, that some 

 Callovian beds are represented at Bihendula, and possibly the whole 

 fauna may be Callovian. 



The Dobar 1 Limestone has yielded four species of corals and two 

 Neocomian mollusca, which Mr. R. B. Newton has kindly identified 

 as Alectryonia rectangularis (Rom.) and Modiola Ferreti (Rochebr.). 2 

 The evidence of the corals agrees with that of the mollusca, and the 

 Dobar Limestone accordingly may be determined as Neocomian and 

 approximately correlated with the Singeli limestone described by 

 A. T. de Rochebrune, the Eaf limestones discovered by Keller, and the 

 cave-forming or Nerincea-limestone of the Miriya Pass and Bur Dab. 

 Mr. Parkinson has collected from Bur Dab a large Nerincea and a 

 Natica which Mr. R. B. Newton tells me are of Neocomian affinities, 

 and from the cave-forming limestone at Dongorreh a specimen of a 

 Nerincea, also of the Neocomian type. 3 



Above the Neocomian beds occurs a thick series of limestones 

 which include Turonian (or possibly Cenomanian) and Eocene repre- 

 sentatives. The lowest part of this series is formed by a cherty 

 limestone from which, in the neighbourhood of Bur Dab, Mr. 

 Parkinson collected some broken mollusca ; these specimens have 

 been determined by Mr. Newton as Gryphoza vesiculosa, J. de C. Sow., 

 Pecten sp. nov., and Spondylus sp., and he therefore suggests that 

 the horizon is Cenomanian. A richer fauna has been obtained by 

 Mrs. Lort Phillips in Uradu, near the Rugga Pass ; she collected 

 there eight species of corals, which are certainly Upper Cretaceous 

 and correspond most nearly to Turonian species. 



The upper part of this limestone series is no doubt Lower Kaino- 

 zoic and probably Eocene. It has yielded an indeterminable species 

 of Conoclypeus and some foraminifera, among which Mr. C. D. 

 Sherborn and Mr. F. Chapman have identified species of Nummulites 

 and Amphistegina, and Orbitoides dispansa (Sow.). The limestone 

 of Mount Eilo, south of Zeila, may represent this horizon in Western 

 Somaliland. 



The last of the five limestones consists of the raised reefs south 

 of Berbera, which are Pleistocene. 



1 Also spelt Duba and Dubbur. 



2 This species was founded on a specimen from Antalo, and its occurrence 

 at Dobar supports M. de Bochebrune's contention as to the Cretaceous age of 

 the Antalo limestone. 



3 The mollusca have been determined by Mr. Newton as Nerincea, allied to 

 Benauxiana, d'Orb., a Nerincea sp. nov., and Natica, allied to Htiyardiana, d'Orb., 

 and as probably denoting a Barremian (that is, Urgonian or Upper Neocomian) 

 age. 



