4(>4 J. P- J- Ravn. 



? Spitsbergen: in deposits belonging, according to Pompeckj, 

 to the "? Portlandian (-Lower Chalk)". 



Nova Zembla: in the Aucella deposits. 



Russia: Callovian. 



Germany: Dogger (from the "Coronaten-Schichten" to the 

 Parkinsonia zone). 



England: Dogger — Lowermost Malm (from Lower Oolite to 

 Coralline Oolite). 



24. Pecten (Entolium) cingulatus Phillips. 

 PL XXXIII, fig. 7. 



(1829) 1835. Pecten cingulatus Phillips, Geology of Yorkshire. I, PL 5, fig. 11. 

 183(i. Pecten cingulatus Phillips; Goldfuss, Petref. Germ., II, p. 74; PL 99, fig. 3. 



The valve oval, but little arched; the angle at the umbo ca. 90°; 

 from each side of the umbo a narrow depression down along the 

 sides, losing itself at about halfway down the valve. The ears small, 

 with slightly blunt angles and somewhat rounded corners. The sur- 

 face with fine, concentric rings of growth. 



Height 21 mm, breadth 18 mm. 



The species described resembles greatly the Pecten figured by 

 Lahusen 1 as P. demissus, but its surface seems to have a different 

 character. It is doubtful, whether a couple of valves from boulders 

 found at Danmarks Havn on the south side of Vesterdalen can be 

 referred to P. cingulatus, as the form of the ears cannot be seen. The 

 same applies to a couple of specimens from the boulder with Aucella 

 mosquensis from Harefjaeld. 



Distribution. North-East Greenland: in the reddish brown, 

 loose-lying sandstone down from "Tnekpasset" (50 m above the sea) 

 on Store Koldewey Island (1 spec). 



Germany: Lias to Lowermost Malm. 



England: Cornbrash (Upper Dogger). 



25. Pecten (Entolium) erraticus FlEBELKORN ? 



1893. Pecten {Entolium) erraticus Kiehelkorn, Geschiebe tier oberen Jurafoimation, 



p. 400; PL 14, fig. 12. 



Some specimens of a very flat Pecten seem from their whole 

 form and their surface, covered with regular, concentric furrows, to 

 be referable to this species. As the form of the ears could not, 

 however, be seen on the available specimens, the determination -is 

 somewhat uncertain. 



Pecten erraticus is given by FlEBELKORN as occurring in Pommc- 

 rania in boulders, which he refers to the Middle Kimmeridgian. 



1 Lahusen, Die Fauna der Jurass. Bild. des Rjasanschen Gouv., PL 2, fig. 4. 



