58 



POMPECKJ. JURASSIC FAUNA OF CAPE FLORA. [norw. pol. exp. 



DISCINA, Lamarck. 



Discina reflexa Sow. sp. 



PI. I. fig. 6, 7, 8, 9, (10?). 



1829. OrUcula reflexa J. D. C. Sowerby, 'Mineral Conchology of Great 



Britain; vol. VI. p. 4, pi. DVI. fig. 1. 

 „ Davidson, 'Monograph of the British fossil Brachio- 

 poda,' vol. I. part III. 'A monograph of the British 

 Oolitic and Liassic Brachiopoda,' p. 10, pi. X. fig. 8. 

 „ A. Oppel, 'Die Juraformation,' § 53, No. 247. 

 „ F. A. Quenstedt, 'Der Jura,' p. 325, pi. 45, fig. 2. 

 „ ? H. Trautschold, 'Der Moskauer Jura vergHchen mit 

 dem westeuropaischen,' Zeitschr. d. Deutsch. geol. Ges. 

 p. 390]. 

 „ F. A. Quenstedt, 'Petrefactenkunde Deutschlands,' II. 



Die Brachiopoden. p. 660, pi. 60, fig. 97—101. 

 , R. Lepsius, 'Beitrage zur Kenntniss der Juraforma- 

 tion im Unter-Elsass,' p. 46. 

 „ Th. Davidson, 'Monograph of the British fossil Bra- 

 chiopoda,' vol. IV. Suppl. to the British Jurassic and 

 Triassic Brachiopoda, p. 82, pi. X. figs. 1 — 6. 

 R. Tate and J. F. Blake, 'The Yorkshire Lias.,' p. 

 414, pi. XV. figs. 5, 6. 

 „ E. W. Benecke, 'Beitrag zur Kenntnis des Jura in 

 Deutsch-Lothringen.' Abh. z. geol. Spez.-Karte v. 

 Elsass-Lothringen, N. F., part I. 1898, p. 22, pi. 

 I. fig. 1. 

 Convex valves of Discina reflexa Sow. sp. were found together with Lin- 

 gula Beani Phill. but less frequently than that species. 



The specimens before me correspond for the most part closely with Eng- 

 lish specimens from Yorkshire. The form of the valves both in the Engfish 

 specimens and in those found in the neighbourhood of Gape Flora, is very 

 variable; side by side with high, more conical specimens with a steeper in- 

 clination from the apex to the posterior margin, (PI. I. figs. 7, 8) occur lower, 

 cup-shaped forms (PI. I. fig. 6). The shell is ornamented with close-set, fine, 

 distinct lines of growth. The upward curve of the shell and of the lines of 



1850. 



1856. DisGina 

 1856. Orhicula 

 [1861. 



1871. 



1875. Discina 



1876. 



1876. 



1898. 



