4o4 •'• P- J- Ravn. 



(5. Oxytoma inaequivalvis SOWERBY, var. macroptera ROEMER. 



PI. XXXII, fig. 1. 



1835. Avicula macroptera F. A. Roemer, Verstein. d. norddeutsch. Oolithen Gebirges, 



p. 86; PI. 4, fig. 5. 

 1902. Oxytoma inaequivalve Sow., var. macroptera Roem. ; L. Waagen, Der Kormen- 



kreis des Oxijt. inaequiv. Sowekby, p. 14; PI. 1. 

 figs. 7 and 14. 



Only the mould of the hindmost part of a left valve. 



The shell strongly arched with up to 10 rounded, primary radial 

 ribs, with intermediate secondary rihs, which reach the same size as 

 the primary a little below the beak. Further, on the younger parts 

 of the shell finer tertiary ribs and on the very youngest a further 

 system of quite line ribs, all in perfectly regular series. On the very 

 hindmost part of the valve only uniform, fairly fine ribs, a sculpture 

 repeated on the large, deeply emarginated wing which is not sharply 

 marked off from the rest of the valve. 



The available specimen must undoubtedly be referred to 0. inae- 

 quivalvis Sow. in spite of its incompleteness, and according to Waa- 

 GEN's description and figures it seems quite clearly to belong to his 

 var. macroptera Roem. 



Distribution. North-East Greenland: Down from "Tradtpasset" 

 on Store Koldewey Island, in a loose-lying stone, 50 m. above the sea. 



North Germany: in the Hils deposits. 



7. Oxytoma inaequivalvis SOWERBY, var. Miinsteri BrONN. 



1829. Avicula Miinsteri Bronx in Leonhard: Zeitschr. f. Mineralogie, 1829, p. 76. 



1836. — — — ; Goldfuss, Petref. Germ., Vol. II: p. 131; PI. 118, fig. 2. 

 1902. Oxytoma inaequivalve Sow., var. Miinsteri Uronn; Waagen, Der Formenkreis 



des Oxyt. inaequiv. Sowerby, p. 13; PI. 1, figs. 

 9 and 11. 



For the remaining synonymy reference may be made to the 

 above-cited work of Waagkn. 



A few left valves of this variety are present, unfortunately so 

 badly preserved that a complete description cannot be given. 



The valve very oblique, strongly arched, covered with a large 

 number of radial ribs of almost the same size. The posterior wing 

 large, distinctly marked off from the rest of the valve. 



Distribution. North -East Greenland: North side of Vester- 

 dalen at Danmarks Havn (1 spec); south side of Vesterdalen (2 spec). 



Europe: in Liassic — Malm (cf. Waagen, 1. c). 



(S. Pseudomonotis (?) sp. 

 A single valve found in a boulder on the south side of Vester- 

 dalen at Danmarks Havn, which seems to belong to one or other 

 species of the genus Pseudomonotis. 



