366 A Month on the Trondhjem Fiord. 



149. Macoma calcarea, Chenin. 

 Eodberg, 0-5 fath. 



150. Macoma halthica^ Linn. 

 Trondhjem. 



151. Ahra longicalluSy Scacchi. 



Trondhjem, 150 fath. ; Rodberg, 250-300 fath., rare. 



152. Ahra nitida, ]\Iull. 



Abundant, Trondhjem and Rodberg, 40-300 fath. 



153. Ahra alha, Wood. 

 Trondhjem, a single specimen. 



154. Poromya granulata, Nyst. 



Two specimens, 150 fath., off Trondhjem. 



155. Cuspidaria rostrata^ Speng. 

 Trondhjem and Rodberg, 70-300 fath. 



156. Guspidaria obesa, Loven. 

 Rodberg, 150-300 fath. 



157. Cuspidaria costeUata, Desh. 

 Rodberg, 40-150 fath. 



158. Guspidaria ahbreviata, Forbes. 

 Rodberg, 70-100 fath. 



1 59. Gorbula gibha, Olivi. 



Only a small specimen or two seen. 



160. Saxicavella plicata^ Mont. 

 Trondhjem and Rodberg, 150-300 fath. 



161. My a arenaria, Linn. 

 Trondhjem, dead valves. 



162. Mya truncata, Linn. 

 Trondhjem, on shore and dredged. 



163. Saxicava rugosa, Linn. 

 Rodberg, down to 250 fath. 



Var. arctica, Linn. 



Unusually large examples of this variety at Rod- 

 berg on the precipices down to 200-250 fath. 



164. Solen pelluciduSj Penn. 

 Two or three small specimens. 



