On Jurassic and Cretaceous fossils from North-East Greenland. 4()5 



Distribution. Norlh-P2ast (Greenland: only round in i}oulders 

 in the neighbourhood of Danmarks Havn, on the north side of 

 Vesterdalen (2 spec.) and on the south side (3 spec), also together 

 with Aiicella mosqiiensis at Harefjæld. 



2(). Pecten (Camptonectes) Broenlundi n. sp. 

 PI. XXXIV, tigs. Г) and (5. 



Large, circular Bivalve with very unequal vah'es. Angle at the 

 umbo ca. 120°. 



Left valve strongly arched; ears fairly small, not reaching over 

 the cardinal marrgin and not very sharply distinct from the rest of 

 the valve; the outer corner of both ears forming a blunt angle. 



Right valve almost perfectly flat; outer corner of its posterior 

 ear almost a right angle; anterior ear not seen. — The surface of 

 both valves with numerous fine and a few coarse lines of growth, 

 and crossing these almost at right angles characteristic, somewhat 

 undulating, fine, deepened lines, which are frequently interrupted 

 especially by the stronger lines of growth. Under the lens other, 

 very fine, depressed lines, usually cutting the first-named, radial 

 lines at a very pointed angle. The sculpture stronger on the wings 

 and in the neighbourhood of these, of a characteristic, papillose 

 character. 



T^eft valve: height 99 mm, breadth 97 mm and thickness ca. 

 18 mm; length of cardinal margin ca. 45 mm. 



In the light-gray sandstone from the top of Muschelberg on 

 Hochstetters Foreland some imprints were found of a large Pecten, 

 which from their whole form might well belong to the same species 

 as the above; unfortunately, small crystals of quartz have been se- 

 creted on the imprints, so that it is impossible to determine the 

 nature of the surface of the valves. Thus, a certain determination 

 cannot be made. This applies also to a cast found in a boulder on 

 the south side of Vesterdalen at Danmarks Havn. It seems, however, 

 to be distinct from P. Broenlundi, having a somewhat broader out- 

 line, a more pointed umbo and unusually flat lateral portions. It is 

 thus even more doubtful, if this specimen can be placed under this 

 species. 



The form described resembles somewhat P. imperialis Keys., both 

 in form and especially sculpture. It is readily distinguished from 

 this, however, among other characters, by both its valves (and 

 especially the right лаЬе) being considerably less arched; further, its 

 cardinal margin is relatively much shorter. P. Broenlundi has greater 

 resemblance to P. validns Lixdsth., but its left vahe is more strongly 

 arched, and the front margin below the anterior ear of the right 



