R. BuUen Newton — Shells from Raised Beaches, Red Sea. 501 



with tlie Red Sea beach deposits, recognizing the Wadi Mellaha beds 

 as of Miocene age, whilst Neumayr and Beyrich both regard them 

 as Pliocene, 



Some importance may be attached to the identification of Fecten 

 Vasseli, a species originally described by Fuchs from the terrace 

 formation of the Bitter Lakes, and which is doubtless the same 

 shell referred to by Fraas under the name of Fecten radula, var. 

 snhfossilis, found in the beach deposits near Kosseir. Examples 

 of this species, with its peculiar dichotomizing ribs and minute 

 striated sculpture, are represented from the following localities in 

 this collection : (a) Raised beach, Northern Wadi Gueh, Camp 6, 

 240 feet above sea; (b) raised beach north of Kosseir ; (c) Upper 

 Coral terrace (Pecten-hed) between Nebk and Sherm, South-East 

 Sinai. At (c) Fecten Vasseli is associated with Ghlamys latissima ; 

 at (a) with a fragment of CJilamys opercularis ; and at (b) with 

 modern Red Sea forms, Codalcia exasperata, etc., and some extinct 

 ones, such as Litlwpliaga Lyellanus. In its typical locality this 

 shell is found with Circe pectinata and other familiar Red Sea species 

 (see Fischer post "Literature"), although not known in the living 

 state. 



Among the more abundant shells of modern species in this 

 collection, and which occur repeatedly at various localities, are : 

 Comis nussatella, Natica melanosfoma, Strombus fasciatiis, Turbo 

 radiatus, Anadara antiquata and radiata, Chama nivalis, Circe 

 pectinata, Codakia exasperata, etc. 



Zist of the Pleistocene Mollusca from the Baised Beach Deposits of the 

 Bed Sea, collected by Mr. Thomas Barron, F.G.S. 



The identification of the following species has been carried 

 out after careful comparison with the finely arranged series 

 of modex-n shells in the Zoological Department of the British 

 Museum. To Mr. Edgar Smith, the Assistant Keeper of that 

 section of the Museum, the writer records his indebtedness for 

 much help, especially with regard to some of the more difficult 

 determinations that have arisen during the progress of this work. 

 The classification of the families is that adopted at the British 

 Museum, and originally suggested by Pelseneer in his "Introduction 

 a I'etude des Mollusques" (Ann. Soc. Roy. Malac. Belgique, 1894, 

 vol. xxvii, pp. 31-243). 



The following explanation of bracketed names, etc., quoted under 

 "Distribution," should be noted:— (B.M.) = British Museum (Recent 

 Shell Department) ; (Barron) = a small collection of unnumbered 

 specimens from Ras Gharib and Jebel Zeit, sent separately by 

 Mr. Barron in August, 1898 ; (Tryon, Issel, etc.) = authorities 

 for distribution of the species, vide " Literature " appended. 



Class GASTEROPODA. 



Family PATELLlDiE. 



Helcioniscus variabilis, Krauss. 



Patella variabilis, Krauss : Die Sudal'rikanisclieu jMoUusken, 1848, p. 35, pi. iii, 

 %. 12. 



