562 Karl A. Grönwall. 



Spiriferina sp. 



In boulders of a highly silicified limestone, recalling the Pro- 

 ductus flint of Spitzbergen, and obtained at the Eskimo Naze, there 

 occur some brachiopod remains which can probably be referred 

 to this genus, but, in consequence of the slight amount of material 

 available, this cannot be determined with certainty. 



In boulder N:o 205 there are found impressions of two dorsal 

 valves, one almost perfect, with a length of 10 mm., the other frag- 

 mentary, belonging to a larger specimen. In this form the beak 

 has projected considerably beyond the curved hinge-line. The valve 

 has had a markedly vaulted median rib, with about 5 ribs on each 

 side of this. The sculpture cannot be seen wdth clearness on the 

 cast, but it has not been laminated, as, in the cast, only some few 

 isolated striæ of growth could be observed nearest the anterior 

 margin of the valve. 



Among the species of Spiriferina that I have had the opportunity 

 of seeing figured, there is none — neither from England, Russia, 

 nor India — that has the beak of the dorsal valve projecting so far 

 beyond the hinge-line. The species in which the beak projects most 

 is Sp. evax Girty (1908, PI. 13, Figs. 22-22 d), but still not to the 

 extent found in our specimen. 



In boulder N:o 210, there is a mould of a dorsal valve of a 

 Spiriferina, about 12 mm. broad and 9 mm. long. The valve is 

 rounded and provided with 9 ribs of which the median rib is com- 

 paratively little prominent among the others. On the mould the ribs 

 appear narrower and sharper than would be the case in specimens 

 with the shell preserved. 



In spite of the very defective condition of preservation, our spe- 

 cimen can very well be compared with certain figurings of Spirife- 

 rina cristata v. Schloth., but still, I consider it would be too daring 

 to identify it with this variable species. Sp. cristata v. Schloth. 

 occurs in Russia from the Cora horizon inclusive, up to the Permian. 



Spirifer or Spiriferella sp. 



PI. XXVII, Figs. 8—9. 



Among the fossils that were obtained free-lying on the main- 

 land behind Henrik Kröyer's Islets, there were also found some 

 silicified brachiopods — all ventral valves belonging to the genus 

 Spirifer, or, more probably, its sub-genus Spiriferella. Several of 

 these were worked out by means of dilute hydrochloric acid, and I 

 succeeded by this means in obtaining a view of the interior of these 

 ventral valves. 



