448 MR, E. B. KEWTON ON THE 



pi. 22, figs. 1-3, p. 136 ; Abicli, Geol. Armenisclien Hochlandes, 1882, 

 pi. 2. fig. 8, p. 289. 



Meretrix incrassata, R. B. Newton, Syst. List British Oligocene and 

 Eocene Mollusca, 1891, p. 64. 



A single specimen, consisting of a cast showing both valves, 

 appears to have the form and thickness o^ Meretrix incrassata, as 

 figured by Deshayes from the Paris Basin Oligocene ; and, in 

 addition, it is very similar to Abich's figure of this species, which 

 depicts a specimen obtained from the Upper Eocene of Achalzib, 

 in the northern part of the Armenian highlands. Our cast also 

 shows obscure indications of a deep pallial sinus on the left valve. 



Its dimensions are: — Height=35 millimetres; length=29; 

 depth = 23. 



Locality. Guverchin Kala; of the same colour and aspect 

 lithologically as observed in the Venus Aglauroe and Meretrix 

 Fersiensis. (Collected by the Rev. C. Labaree.) 



Formation. Miocene (Burdigalian or Aquitanian). 



Caedita sp. indet. (Plate 29. figs. 6, 7.) 



This determination refers to a single specimen having both 

 valves attached. It is inequilateral, somewhat depressed, and 

 possesses about 20 radial, rather arched costse, which are orna- 

 mented with a bead-like, squamulose structure, the prominences 

 of which have been eroded by aqueous action. The anterior 

 margin is short and rounded, whilst posteriorly it is oblique and 

 produced ; lunule small and cordate. 



The specimen is in bad preservation, with the umbonal surfaces 

 fractured. It appears to represent a new species, but without 

 more material the present reference will suffice, although it may 

 be said to bear a curious resemblance to the figure of Gardita 

 mutabilis of d'Archiac & Haiaie (' Descr. Anim. Foss. Nummu- 

 litique de I'Inde,' 1854, vol. ii. pi. 21. figs. 3-6, p. 256), from the 

 Eocene of Subathoo, North-west India. 



i)^«^e^s^ows (in millimetres). Height =16; length=20; depth 

 =10. 



Locality. Beach of the island of Koyun Daghi. 



'Formation. Miocene (Helvetian). 



GrASTEROPOBA. 



Steombtjs like Bonblli, Brongniart. 



This specimen consists of a fragmentary water-worn cast which 

 .appears to be referable to this species. Only the two latest 



