506 WALKER, ARCTIC MOLLUSCA. 



B. cjaneum, Chemn. Melville Bay, 140 fathoms; Port Kennedy 



(lat. 72° N., long. 94° W), 15 fathoms. 

 B. undulatum. Port Kennedy, 15 fathoms. 

 B. hydrophanum, Hancock. Port Kennedy, 15 fathoms. 

 B. Groenlandicum, Hanc. Port Kennedy, 15 fathoms. 

 B. tenebrosum, Hanc. Godhavn, 10-20 fathoms. 

 B. ciliatum, Hanc. Port Kennedy, 10 fathoms. 

 B. plicosum, Hanc. Melville Bay, 100 fathoms. 

 Trophon clathratus, L. Godhavn, 20 fathoms. 

 T. clathratus, var. scalariformis. Godhavn, 20 fathoms. 

 Mangelia turricula, Mont. Godhavn, 20 fathoms ; Melville Bay, 



80-140 fathoms. 

 M. Trevelliana, Turton. Port Kennedy, 15 fathoms. 

 M. rufa, Mont. Godhavn, 15 fathoms ; Port Kennedy, 10 



fathoms. 

 Natica pusilla. Say ? Gould. Godhavn, Fiskernaes, and Port 



Kennedy, from 5 to 20 fathoms. 

 Turritella lactea, Moll. Melville Bay, 80-100 fathoms. 

 Littorina tenebrosa, Mont. Godhavn, 20 fathoms. 

 Scalaria Groenlandica, Sow. Godhavn, 20 fathoms. 

 Margarita cinerea, Couth. Godhavn, 15 fathoms. 

 M. arctica, Leach. Port Kennedy, 10 fathoms, very abundant. 

 M. umbilicalis. Sow. Cape York, 10 fathoms ; Port Kennedy, 

 M. undulata. Sow. Godhavn, 15 fathoms. 



Lottia testudinalis, Gray. Godhavn ; Fiskernaes ; Melville Bay. 

 Chiton marmoreus, Fab. Port Kennedy and Godhavn, 10-20 



fathoms. 

 Bulla sculpta, Reeve. Port Kennedy, 10 fathoms. 

 Cylichna alba, Loven. Near Cape York, 15 fathoms. 

 Saxicava arctica, L. Godhavn, Fiskernaes, Melville Bay, and 



Cape York, 5 to 140 fathoms. 

 S. rugosa, L. Reefkol and Godhavn, 10-25 fathoms. 

 Mya arenaria, L. Godhavn and Melville Bay, 10-120 fathoms, 

 M. truncata, L. Reefkol; Fiskernaes; Godhavn. 

 M. truncata, var. Uddevallensis. Reefkol ; Fiskernaes ; Godhavn. 

 Tellina proxima, Brown. Godhavn ; Melville Bay. 

 Astarte compressa, Mont. Reefkol ; Godhavn ; Melville Bay ; 



Port Kennedy ; 10-140 fathoms. 

 A. arctica. Gray. Melville Bay ; Port Kennedy. 

 A. elliptica, Br. Melville Bay ; Port Kennedy. 

 A, sulcata, DC. Godhavn. 

 A. Warhami, Hancock. Godhavn. 

 A. fabula, Reeve. Port Kennedy, 15 fathoms. 

 Cardium Groenlandicum, Chemn. (Young.) Godhavn ; Melville 



Bay. 

 C. Islandicum, Chemn. Godhavn ; Melville Bay. 

 Montacuta bidentata, Gould. ? Cape York. Small and unique. 

 Mytilus edulis, L. Fiskernaes ; Godhavn ; Melville Bay. 

 M. edulis, var. elegans. Melville Bay. 

 Velutina laevigata. Melville Bay, 100 fathoms. 

 Nucula tenuis, Mont. Godhavn and Melville Bay, 10-20 fathoms. 

 N. Portlandica. Melville Bay, 80 fathoms. 



