MIOCENE MOLLFSCA OE LAKE UEMI. 451 



1855, vol. iii. pi. 43. figs. 13, 14, p. 424 j Abicli, Geol. Armenisclien 

 HocMandes, 1882, pi. 8. fig. 14, p. 279. 



This species is represented by a fragment exhibiting three 

 wborls of the upper part of the spire, with depressed, spirally- 

 striated surfaces and margined by prominent bicarinations. 



The species occurs in Northern Italy (Brongniart) ; Vienna 

 Basin (Homes); Egypt (Puehs); "Urmia Plateau," north- 

 western Persia (Abich), &c. 



Locality. Koyun Dagh.i (beach specimen). 



Formation. Miocene (Helvetian). 



Ttjeeitelia geadata, Homes. Yar., Ahich. (Plate 29. fig. 9.) 



Turritella gradata, var., Abich, Geol. x'^rmenisclien Hochlandes, 1882, 

 pi. 8. fig. 12, p. 280. 



This consists of a water-worn fragment showing three whorls 

 with depressed surfaces, the spiral sculpture being nearly obso- 

 lete, but having a prominent elevated keel at the base of each. 

 Abich regarded his shell as a variety of Homes' T. gradata from 

 the Vienna Miocene (Abhandl. k.-k. Greol. Eeichs. 1855, vol. iii. 

 pi. 43. fig. 3, p. 420), with which it seems to be closely related ; 

 his specimen was from the "Urmia Plateau." 



Locality. Beach of the island of Koyun Daghi. 



Formation. Miocene (Helvetian). 



TuEEiTELLA eotieeea, Lesliayes, afBn, Abich. (Plate 29. 

 fig. 10.) 



Turritella rotifera afiin., Abich, Geol. Armenischen Hochlandes, 1882, 

 pi. 8. fig. 11, p. 279. 



This is a fragmentary specimen which undoubtedly belongs to 

 the form determined by Abich as above. On account of the 

 turreted whorls, their spiral sculpture and the equidistant pro- 

 minent keels, Abich regarded this form as related to T. rotifera 

 of Deshayes (Desc. Coq. Poss. Env. Paris, 1832, vol. ii. pi. 40. 

 figs. 20, 21, p. 275), from the Paris Basin Eocene. Abich's speci- 

 men was found on the " Urmia Plateau." 



Locality. From the beach of the islaad of Koyun Daghi. 



Formation. Miocene (Helvetian), 



EXPLANATION OF THE PLATES. 

 Plate 29. 



Pig. 1. Pecten {Oopecten) rotundatus. Seir Hill. 



2. Pecten Beudanti. Neighbourhood of XJrmi. 



3. Ghlamys sp. indet. Neighbourhood of Urmi. 



