The marine Carboniferous of North-east Greenl. and its Brachiopod Fauna. 563 



Although they cannot be identified with any species previously 

 described, I have wished, however, to figure and mention them. 



Fig. 8 shows a ventral valve which, both as regards form and 

 the interior structure, recalls very closely younger specimens of Sp. 

 polaris WiMAN (PI. IV, Figs. 5 — 7), which, however, are somewhat 

 smaller (15 — 23 mm. in width) than our specimen, which measures 

 about 40 mm. in width. 



Fig. 9 shows a somewhat imperfect specimen of a form which 

 is characterized by a specially high area, and very powerful cardinal 

 teeth, supported by faintly developed dental plates, and with, in 

 general, a very compact umbonal part. The internal structure of 

 the valve agrees very well with the type that Tschernyschew 

 describes in such detail in Spiriferella saranœ Vern. (1902, pp. 522 

 —526). 



In addition to the specimens figured, there are two fragments 

 of ventral valves closely related to that shown in Fig. 9, and cer- 

 tainly belonging to the same species as that, and also a rolled frag- 

 ment of a form which bears a greater resemblance to the original 

 of Fig. 8. It also recalls the rolled specimens of the umbonal part 

 of Sp. polaris that Wiman figures in PI. V, Figs. 1—4. 



Fig. 8 pretty certainly belongs to a species nearly related to Sp. 

 polaris Wiman, but I dare not express any opinion as to the rela- 

 tionship to the form figured in Fig. 9. Sp. polaris is one of the 

 commonest species in the Carboniferous deposits of Spitzbergen and 

 Beeren Eiland. 



N:o 5. Spirifer d. sp.? ex afl. Sp. duplicicostæ Phill. 

 PI. XXVII, Figs. 10—11. 



This form, which is represented only by one specimen of a ven- 

 tral valve found in a boulder in the Cape Jungersen section (N:o 111), 

 stands probably nearest to Sp. duplicicosta Phill. and Sp. Wgnnei 

 Waagen, but diff"ers so considerably from both that I do not con- 

 sider that I am able to refer it to either of these species, even as a 

 variety. On the other hand, the form does not appear to me to be 

 sufficiently sharply characterized, nor the material, either, rich 

 enough to justify my giving a special name to this form. 



The valve is oval; the length somewhat less than the width; 

 the greatest width of the valve somewhat greater than the hinge- 

 line. The valve is fairly evenly arched from the anterior margin 

 to the beak, which is bent somewhat beyond the high cardinal area. 

 The beak is greatly compressed and projects from the lateral portions 

 of the valve, which slope sharply towards the angles of the valve. 

 From the beak there runs a fairly deep and moderately broad sinus 



