Vol. 67.] KAIN0Z0IC MOLLTJSCA EROM CYRENAICA. 621 



Chelycontjs mediterraneus (Hwass, in Bruguiere). 



Comis mediterraneus Hwass, in Brugui&re, ' Hist. Nat. des Vers : Moll.' Encycl. 



Meth. 1792, vol. i, pt. 2, p. 701, & ibid. 1798 (edited by Lamarck) pi. cccxxx, 



fig. 4. 

 Chelyconus mediterraneus (varieties) Sacco, 'Moll. Terr. Terz. Piemonte ' 1893, 



pt, 13, pi. x, figs. 1-15 & pp. 103-107. 

 Conus mediterraneus Bede, Bull. Mus. Hist. Nat. [Paris] 1903, vol. ix, 



pp. 422-25. 



Remarks. — A single specimen has been determined as this 

 species, but soon after identification it was unfortunately lost. 

 Prof. Sacco has described varieties from the Upper Tertiary of Italy ; 

 while M. Paul Bede records it from the post-Pliocene deposits of 

 Tunisia (Sfax), and the species lives at the present day. 



Pelecypoda. 



Ostrea edulis Linnaeus. 



Ostrea edulis Linnaeus, 'System a Naturae' 1758, ed. 10, p. 699; Sacco', 'Moll. 

 Terr. Terz. Piemonte ' 1897, pt. 23, pis. i-ii & pp. 4-9. 



Remarks. — This form is represented by a single thick and 

 roughly-worn valve, which partly discloses the ligamental area. 

 According to Prof. Sacco, several varieties of this oyster occur 

 throughout the Helvetian stage of the Miocene and also in the 

 Pliocene rocks of Italy. It has also been recognized by various 

 authors from the post-Pliocene deposits of Mediterranean countries, 

 England, etc., Messrs. Bellamy & Jukes-Browne mentioning its 

 occurrence in such beds at Cyprus. 1 The species belongs to the 

 living fauna of the seas of Europe, etc. 



Glyctmeris glycymeris (Linnaeus). 



Area glycymeris Linnaeus, ' Systema Naturae ' 1758, ed. 10, p. 695. 

 Pecttmcuius glycymeris Searles Wood (pars), Monogr. Pal. Soc. (British Crag 

 Mollusca) 1850, pi. ix, figs, la-lb & p. 66. 



Remarks. — This species is here restricted to the widely orbicular 

 examples and not to the more elongate forms, which are regarded 

 as belonging to the species pilosa of Linnaeus, described in a later 

 edition of the ' Systema Naturae.' Its advent dates from Pliocene 

 times, and it lives at the present day in European seas. 



Cerastoderma edtjle (Linnaeus). (PL XLIII, fig. 6.) 



Cardium edule Linnaeus, 'Systema Naturae ' 1758, ed. 10, p. 681. 

 Cerastoderma edtcle Sacco, 'Moll. Terr. Terz. Piemonte' 1899, pt. 27, pi. xi, 

 fig. 24 (and varieties, figs. 25-32) & pp. 48, 49. 



Tt em arks. — This species and its varieties are regarded as com- 

 mencing in Pliocene times; it is also now found in the seas of 

 Europe. The collection contains two left valves from this deposit, 

 which is regarded as being of more recent origin than those 

 from the compact limestone to be presently mentioned. According 

 to M. Paul Be'de,' 2 the species occurs in both divisions of the 

 Quaternary formations of Tunisia. 



1 ' Geology of Cyprus ' 1905, p. 41. 



2 ' La Feuille des Jeunes Naturalistes ' 1904, No. 408, pp. 2 & 13. 



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