SSD 
201 
NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
Solariella varicosa (Mighels & Adams), Bank of Newfoundland ; rhachian tooth. X 300. 
The same, Mossel Bay, diameter 12: lamelle 12. X 240. 
Cyclostrema turgidum n. sp. (Pl. 5, fig. 39); lamelle circa 35; a the 4th median tooth, b the first lamella from 
the side. X 800. 
Cyclostrema basistriatum (Jeffreys) G. O. Sars, Lofoten (P1. 5, fig. 40), rhachian tooth. X 800. 
Solariella obscura Couthouy, Vega Exp. 62” 39/N., 177” 5 W., juv. (d. 4.3). X 240. a cusp of the äth lamella, 
highly magnified. Lamelle 6. 
The same, from the same locality, another sp. (Pl. 5, fig. 19, the median sp.). X 240. Lamellze 10. 
The same, var. intermedia, Matotschkin sharr. X 240. Lamellzre 10. 
The same, var. intermedia, Waidaguba. X 240. Lamelle 10. 
The same, var. albula, Kildin Island, rhachian and lst median tooth. X 240. Lamelle 6. 
The same, var. bella, 72” 10! N. X 240. Lamelle 7. 
The same, var. finmarchica, Finmark (PI. 5, fig. 35); d. 4. X 240. Lamellze 6. 
The same, var. bella, Godthaab (PI. 5, fig. 4). X 240. Lamelle 6. 
The same, transition from forma typica to var. bella, Solowetskij Island (P1. 5, fig. 15). X 240. Lamelle 7. 
The same, var. multilirata, Davis Strait (PI. 5, fig. 29). X 240. TLamell:e 8. 
The same, var. bella, Grötsund (P1. 5, fig. 27). X 240. Lamellx 8. 
The same, var. multilirata, Umanak (Pl. 5, fig. 33). X 240. Lamellze 5. 
