92 



NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. PROSOBRANCHIA. 1 DIOTOCARDIA. 



Solariella varicosa (Mighels & Adams), Bank of Newfoundland; rhachian tooth. X 300. 

 The same, Messel Bay, diameter 12: lamellas 12. X 240- 



Cyclostrema tvirgidum n. sp. (PI. 5, fig. 39); lamella? circa 35; a the 4th median tooth, b the first lamella from 

 the side. X 800. 



Cyclostrema basistriatum (Jeffreys) G. O. Sars, Lofoten (PI. 5, fig. 40), rhachian tooth. X 800. 



Solariella obscura Couthouy, Vega Exp. 02° 39' N., 177° 5' W., juv. (d. 4.3). X 240. o cusp of the öth lamella, 



highly magnified. Lamellas 6. 



The same, from the same locality, another sp. (PI. 5, fig. 19, the median sp.). X 240. Lamellte 10. 

 The same, var. intermedia, Matotschkin sharr. X 240. Laraellse 10- 

 The same, var. intermedia, Waidaguba. X 240. Lamellse 10. 



The same, var. albula, Kildin Island, rhachian and 1st median tooth. X 240. Lamelhe C. 

 The same, var. bella, 72' 10' N. X 240. Lamella? 7. 



The same, var. finmarchica, Finmark (PI. 5, fig. 35); d. 4. X 240. Lamella? G. 

 The same, var. bella, Godthaab (PI. 5, fig. 4). X 240. Lamell» G. 



The same, transition from forma typica to var. bella, Solowetskij Island (PI. 5, fig. 15). X 240. Lamellte 7. 

 Tlie same, var. multilirata, Davis Strait (PI. 5. fig. 29). X 240. Lamellic 8. 

 The same, var. bella. Grötsund (PI. 5, fig. 27). X 240. Lamella:' 8. 

 The same, var. multilirata, Umanak CPl. 5, fig. 33). X 240. Lamella^ 5. 



