Vol. 60.] THE DISTRICT SURROUNDING THE DARDANELLES. 283 



a variability of contour, some being more transverse than others. 

 It is of frequent occurrence in the marly rocks of Gherme Tepe, 

 Yailah, etc. Originally it was described from Podolia, but since then 

 the species has been identified 05^ Baily from the Crimea (specimens in 

 the British Museum), by A. d'Archiac from Turkey, and by Fischer 

 from the neighbourhood of the Bosphorus (between Yerlukeui and 

 the fort of Kilia). 



Horizon. — Miocene (Sarmatian). 



Localities. — Yailah; north-west of Keshan (the Potteries); 

 Gherme Tepe, near Keshan ; Yailah-Ghonue ; and from a brook east 

 of Teke-keui. 



Miocene (lacustrine Sarmatian). 



Sarmatian freshwater deposits occur in the neighbourhood of 

 Kerassia, and have yielded the following fossils : — 



Planorbis cf. comu, Brongniart. 



Limn (S a. 



Mclania cf. Escheri, Merian. 



Bithi/nia, in association with a large flattened Anodonta (indet.). 



Neritina, accompanied by the casts of a small trigonal Unio 

 (— Unio cf. Spratti, Calvert & Neumayr). 



Anodonta, a large, somewhat crushed form, in a grey marly 

 matrix, which appears to be intermediate between the 

 A. cygncea of modern European rivers and the A. helles- 

 pontica 1 from the Sarmatian deposits of the Dardanelles. 



The other species of Sarmatian age are as follows : — 



/ Planorbis comu, Brongniart. 



Melano'psis incerta, Ferussac. (PL XXIV, figs. 12 & 13.) 

 Melanopsis buccinoidea, var., Ferussac. 

 J Melania cf. Escheri, Merian. (PI. XXIV, fig. 11.) 



Unio Belcsserti, Bourguignat. (PI. XXIV, fig. 14.) 

 Unio sp. 



Locality. — In a drab-coloured marly clay, Potamina Dere. 



/ Planorbis comu, Brongniart. 



J Unio cf. Spratti, Calvert & Neumayr. 



Limnocardiuid. 

 i Corbicula. 



Cypris. 



\ Locality. — In drab-coloured marly clays, from near Arabli. 



/ JIalitherium? (a lumbar vertebra, determined by Dr. C. W. 



Andrews). 

 Biplomi/stus marmorensis, sp. nov., A. S. Woodward (see 



p. 284). 

 Unio cf. Belcsserti (impression of valve). 

 Limnocardium associated with Cypris (ostracoda). 



Locality. — Gorgona Dere (southern end) near Sarkeui (Sea of Marmora). 



The fauna here tabulated contains certain species which have been 

 already noticed by Calvert & Neumayr, 2 Prof. R. Hcernes, 3 etc., 



1 P. Fischer in TchihatcheflTs ' Asie Mineure : Paleontologie ' (1866) p. 349 

 & pi. vi, fig. 2. 



2 Denkschr. d. k. Akad. d. Wissensch. Wien, vol. xl (1880) p. 374. 



3 Sitzungsberichte d. k. Akad. d. Wissensch. Wien, vol. lxxiv (1876-77) pt. i, 

 Dp. 7-34. . 



u2 



