(id 



POMPECKJ. JURASSIC FAUNA OF CAPE FLORA. [norw. POL. EXP. 



Limea cf. duplicata Goldf. was found in grey, clayey sandstone, on 

 July 16Hi, 1896, 500—550 ft. above the sea, north of Elmwood. 



LEDA, Schumacher. 



Leda cf. Nuda Keys. sp. 

 Letterpress fig. 11. 



1846. Nncnla nuda KeyserHng, in A. Graf Keyserling und P. von Kru- 



senstern, 'Wissenschafthche Beobachtungen auf einer Raise in das Petschora- 



Land im Jahre 1843,' Petersburg, 1846, p. 307, pi. 17, figs. 7-9. 



The cast here figured of a flat, 



.,- • r~'*i»s^" " . ~--. elongated left valve, agrees very well 



f ^ in outline and in dimensions (length 



circ. 25 mm., height circ. 12 mm.) with 



the Leda (not Nucula) nuda found 



~J by Count Keyserling at the mouth of 



the Ischnia, and at Poluschino in Pet- 

 Fig. 11. Leda cf. nuda Keys. sp. Cast 

 of the left valve showing the impressions schora Land. Count Keyserlmg states 



of cardinal denticulation. ^^^^ ^^^ ^^^^^ denticles in his SpecieS 



2 X enlarged. 



are very long and numerous — more 



than 16 along the posterior margin. In the present form, the impres- 

 sions of more than 30 hinge denticles may be counted behind the umbo. 

 This difference prevents me from directly identifying our specimen with the 

 species described from Petschora Land. 



Leda ntula Keys. sp. is also recorded by Lindstrom^ and Lundgreen^ 

 from Spitzbergen. From Lindstrom's figure, however, it appears to be doubtful 

 whether this species really also occurs in Spitzbergen. Lindstrom's Leda 

 nuda shows a very much more sharply projecting umbo. 



Leda [Nucula) PJiillipsi Morris ^ from the Oxford Clay of Wiltshire, and 



1 G. Lindstriim, 'Om Trias- och Juraforsteningar frfin Spitzbergen'. K. Svensk. Vetensk. 

 Akad. Handl. vol. 6, 1865, p. 12, pi. 11. fig. 16 (compare reference to Nucida nuda 

 Phillips, 'Geology of Yorkshire.' I. pi, V. fig, 5). 



- B. Lundgreen, 'Bemerknungen ilber die von der schwedischen Expedition nach Spitz- 

 bergen 1882 gesammelten Jura- und Trias-Fossilien'. Bihang till K. Svenska Vetensk.- 

 Akad. Handl. vol. 8, No. 12, p. 12. 



3 J. Morris, 'List of Organic Remains etc' in R. N. Mantell, 'An Account of the Strata 

 and Organic Remains exposed in the Cuttings of the Branch Railway, . . . etc. . . 

 Wiltshire'. Quart Journ. Geol. Soc. London, 1850, p, 318, pi. XXX. fig. 1. 



