Tafel X. 



Fig. 1. Derbyia graiidis Waag. Ventralklappe. Exemplar N 420. Store Bjoinekap. 

 Natiirliche GrOsse. 



,, 2. Spirifer Nikitini Tschebnyschew. Ventralklappe. Store Bjornekap. Exem- 

 plar N 458. Natiirliche GrOsse. 



„ 3. Spirifer condor d'OsB. Ventralklappe. Store Bjornekap. Exemplar N 447. 

 Natttrliche GrGsse. 



