Vol. 60.] THE DISTRICT SURROUNDING THE DARDANELLES. 289 



Foramixifera (continued). Foramixifera (continued). 



Nummulites (probably) like those from Globigerina. 



Vernitza. Rotaline forms. 



Discocyclina. L o c a 1 i t y.— Mount Elias. 



Orbit olites (probably) complanata, „ . . . . . , r 



t V Kock-specimen containing JXvmmu- 



Alveolina (near to) oblonga, D'Orbismy. ' es ' 



Textilaria. L o c a li t y.— Teke-keui. 



Biloculina. For fuller information respecting 



Polymorphina. the Foraminifera, see Mr. R. Hol- 



MUiolina. land's Report, Appendix III, p. 292. 



Mollusca — Lahellitsranchta. 

 Spondylus subspinosus, D'Archiac. (PI. XXIV, figs. 2L & 25.) 



Spondyhis subspinosus, D'Archiac, 'Descr. des Foss. du Groupe Xummulitique, 

 &c.' Mem. Soc. Geol. France, ser. 2, vol. iii (1850) pt. ii, p. 437 & pi. xiii, fig. 1. 



Represented by a single valve showing a regular convexity. 

 The surface is ornamented with rounded ribs of considerable 

 strength, separated by deep and prominent grooves, the sides of 

 which, as well as the ribs, are covered with extremely-fine transverse 

 striations. The specimen is imperfect on the right side, so that the 

 exact number of ribs cannot be ascertained, but about nineteen 

 can be counted ; in all probability, therefore, the original number 

 was about 23, that for the type-specimen being from 21 to 23. 

 Xo auricles are preserved, and the ribs have been subjected to 

 some eroding influence, as their summits are frequently smooth and 

 not striated. Occasionally, short and thick spines are observable 

 on the ribs, especially near the sides of the valve. The dimen- 

 sions exceed those of the type, as the following comparison will 

 illustrate : — 



Col. English's specimen. Type. 



Height 60 millimetres. 45 mm. 



Length 52 mm. 39 mm. t 



Except in size, therefore, the specimen from Turkey appears to 

 correspond with the type described and figured by A. d'Archiac from 

 the Xummulitic rocks of Biarritz. 



Dr. E. Fournier reports its occurrence in the Middle Eocene 

 deposits of the Central Caucasus. 1 



Horizon. — Middle Eocene (Lutetian) : matrix containing num- 

 mulites. 



Locality. — Tzenguerli Dere. 



FiiiBRiA subpectunculus, d'Orbigny. 



Corbis pectuncidus, Lamarck, 'Hist. Xat. Anim. sans Vert.' vol. v (1818) p. 537; 



Deshayes, ' Descr. Coq. Foss. des Environs de Paris ' vol. i (1824-35) p. 87 & 



pi. xiii, figs. 3-6. 

 Corbis subpectuneidus. D"Orbienv. 'Prodrome Paleont. Strat. Univ.' vol. ii (1850) 



p. 387. 

 'Fimbria subpectunculus, Deshayes, ' Descr. Anim. sans Vert.' vol. i (1860) p. 607. 

 Corbis subpectunculus, D'Archiac. in Viquesnel's ' Vovase dans la Turquie 



d'Europe ' vol. ii (1868) p. 459. 



Eepresented by a fragmentary right valve, showing the 



1 These presentee a la Faculte des Sciences de Paris: 'Descr. Geol. Caucase 

 Central ' (Marseille, 1896) p. 182. 



