the Tiondhjem Fiord. 361 



attains a much larger size iii the Norwegian fiords tliaii iu 

 the British seas. 



78. Emarginula crassa^ Sow., and var. depressa, G. O. Sara,- 

 Five specimens at Rodberg on the precipices, 100-250 fath. 



79. Puncturella noachina, Linn. 

 Trondhjem and Rodberg, 5-200 tath. 



80. Pilidium falvum^ Miill. 

 Trondhjem and Rodberg, 5-40 fath. 



81. Acmcea virginea^ Miill. 

 Specimens small, Rodberg, 0-40 fath. 



82. Lepeta cceca, Miill. 



3-40 fath., Rodberg and Trondhjem. 



83. Patina pellucida, Linn. 

 Rodberg, on Laminarise. 



84. Patella vulgata, Linn. 



85. Hanleyia dehilis, G>)CdiYj= Ckiton Hanleyi^ Bean. 

 100-250 fath., Rodberg and Trondhjem. 



86. Leptochiton alveolus^ M. Sars. 

 150-250 fath., Rodberg. 



87. heptocMton cinereus, Linn.,= C. asellus, Ghemn. 

 5-10 fath. 



88. Trachydermon ruber^ Linn. 

 Shallow water. 



Var. candidusy Norman. 



A very pretty variety occurred at Rodberg, of 

 which I found three specimens, all exactly alike. 

 Valves white, except a longitudinal central dorsal 

 line of rose-colour on the fifth valve, and the girdle 

 also rose-coloured. 



89. Trachydermon alius, Linn. 

 Shallow water, Rodberg. 



90. Trachydermon exaratus, G. O. Sars. 

 200-250 fath., Rodberg. 



91. ToniceUa marinorea, Fabr. 



Shallow water, Trondhjem and Rodberg. 



