Serpula lituus of Hisinuer, not of Schlotheim, the type specimen of which 

 belongs to the Museum of the College of Wisby, is derived from Cretaceous 

 strata, probably from Scania, not from Gotland, as Hisinger believed. 



MOLLUSCA. 



Cephalopoda. 



The descriptions of the few hitherto known species are dispersed in the old works 

 of Wahlenberg and Hisinger. Boll Beitrag zur Kenntniss der Silurischen 

 Cephalopoden im norddeutschen Diluvium und den anstehenden Lagern 

 Schwedens. Archiv fiir natuigesoh. Meklenburgs 1857. 



Barrakde. Systeme Silurieu de Boheme, vol. TI pt. Ill p. 692 — 708. 



The genera Ophidioceras, Choniceras and Ascoceras will be described in a 



shortly forthcoming paper. 



1. Orthoceras columnare Marklin (=0. Dahlii Barr.) d 



2. intermedium Barr, non Markl d 



3. Sjogreni Barr d 



4. anulatum Sow c — h 



5. ornatum Boll (= O. temerum Barr.) C 



6. Hisingeri Boll (O. gotlandicum Boll, 0. refragans Barr.) d 



7. verticillatum Hag. (O. gotlandicum Barr. non Boll.) --. C 



8. tesselatum Ang. h 



9. angulatum Wahl d 



10. Lindstromi Barr _. c 



11. Loveni Barr c 



12. asserculatum Ang d 



13. striatulum Boll ? 



14. Hagenowi Boll (O. intermedium Markl., not Barr.) .-- d 



15. imbricatnm His. non Wahlenberg (0. pseudoimbri- 



catum Barr.) - d 



16. orientale n. (0. imbricalum Barr.) ?d 



17. cochleatum Schlotheim be 



18. nummularium Sow.? f — h 



19. laraellaturo Ang be 



20. gregariura Sow ? 



21. Nautilus Hisingeri D'Orb. (N. complanatus His. 1829, not 



Sow. 1820; Phragmoceras complanatum List U. Sil, Gotl. 1885) Q 



22. Trochoceras (Inachus His.) costatura His be 



23. Ophidioceras reticulatum Ang. in Fragraenta Silurica e^ — h 



24. rota n. - h 



25. Phragmoceras Angelini Barr. e ?• 



26. perversum Barr. h 



27. Choaniceras incurvum n. g. et sp. - h 



28. Ascoceras cochleatum n - b 



29. dolium n b 



30. fistula n h 



31. pupa n - h 



32. reticulatum n h 



33. bohemicam Barr ,-- d — e 



