of the Coasts of Nordland and Finmark. 269 



Lima subauriculata. Astarte sulcata. 



Mytilus edulis. ejliptica. 



Modiola modiolus. arctica. 



Crenella decussata. compressa. 



discors. Venus striatula. 



nigra. ovata. 



marmorata. Mactra elliptica. 



Area nodulosa. Tellina solidula. 



Nucula nucleus. fabula. 



■ tenuis. Psammobia ferroensis. 



Leda caudata. tellinella. 



lucida. Syndosmya alba. 



Cardium echinatum. prismatica. 



edule. intermedia. 



fasciatum. Soleu pellucidus. 



nodosum. Mya truncata. 



Lucina borealis. arenaria. 



flexuosa. Corbula nucleus. 



Artemis exoleta. Saxicava arctica. 



lincta. Thracia convexa. 



Kellia suborbicularis. phaseolina. 



Montacuta substriata. Periploma praetenuis. 



Cyprina islandica. Lyonsia arenosa. 



Coralline Zone. 



This region is very rich in Mollusca, and many of the rarest 

 northern shells were obtained from it. The most common and 

 generally distributed shells are, Trophon Gunneri, Pleurotoma 

 nivale, Cerithium metula, Scalaria groenlandica, Trochus mille- 

 granuSj Margarita alabastrum and cinerea, Patella ccEca, Pilidium 

 fulvumi Chiton asellus, Cylichna cylindracea, Terebratula cranium, 

 Terebratulina caput-serpentis, Crania anomala, Pecten islandicus 

 and striatus, Modiola phaseolina, Crenella nigra, Nucula nucleus 

 and tenuis, Astarte crebricostata and elliptica. Echinodermata 

 are not so abundant as in the next zone, but several species are 

 common, among which are Echinus miliaris, Amphidetus ovatus, 

 Schizaster fragilis, Astropecten Mulleri, Luidia fragilissima, 

 Amphiura jiliformis, and Ophiopholis aculeata, 



Testacea of the Coralline Zone. 

 Gasteropoda. 



Cancellaria viridula. Bela turricula. 



Trichotropis borealis. rufa. 



Fusus antiquus. Trevelliana. 



Trophon clathratus. Defrancia linearis. 



Gunneri. pyramidalis. 



Buccinum undatum. Natica nitida. 



Humphreysianum. Montagui. 



fusiforme. helicoides. 



Nassa incrassata. pusilla. 



Pleurotoma nivale. clausa. 



