rOSSIL COEALS OF LAKE tJEMI, 



427 



a specimea o£ 0. Q-uentheri ; the transverse section looks different 

 from that of Abich's figure (pi. ix. fig. 6 a) of 1859, but that figure 

 was probably based on an altered specimen in •which the true in- 

 ternal structure was obscured. ' The second variety is no doubt 

 a worn fragment of 0. Saimei (d'Archiac) *. 



3. Oebicella Haimei (d'ArcJiiac) t, 1866. 



This species was founded for a specimen said to come from the 

 Lower Tertiary of Thrace. D'Archiac's figure agrees so closely 

 with two specimens from the Seir conglomerate, that I feel doubt 

 as to the correctness of the Thracian horizon. The two specimens 

 agree in all essential characters; but the smaller specimen has 

 been rolled and worn so that the corallites are left separated by 

 a raised wall, instead of by intercalicular depressions. 



The dimensions of the type and of the specimens from the 

 Seir conglomerate are given herewith : — 



The coral figured by Abich in 1882 ^ as Seliastrcsa Defrcmcei 

 var. 2, is probably a specimen of this species. 



4. SOLENASTEiEA TUEONENSIS {Mlclielill), 1847 §. 



This widely distributed Helvetian coral is represented by two 

 specimens — a large mass 130 mm. in diameter from the conglo- 

 merate at Seir, and a rolled specimen from Koyun Daghi. In 

 reference to the latter, it should be noted that the lithological 

 condition of the fossil is very different from that of the other 

 specimens from that island. As usual in fossil specimens of Solen- 



* Abich, ibid. p. 274, pi. y\\. fig. 15. 



t Heliastrcsa Haimei, d'Archiac in Tcbihatcheff's ' L'Asie Mineure,' Paleont., 

 1866-69, p. 191, pi. XV. figs. 5, 6. 



+ Abich, 1882, op.cit. p. 274, pi. vii. fig. 15. 



I Astraa turonensis, Michelin, 1847, Icon. Zooph. p. 312, pi. Ixxv. figs. 1, 2 ; 

 Solenastrcea turonensis, Edwards & Haime, 1857, Hist. Nat. Cor. vol. ii. p. 498. 



32* 



