the Trondhjem Fiord. 361 
attains a much larger size in the Norwegian fiords than in 
the British seas. 
78. Emarginula crassa, Sow., and var. depressa, G. O. Sars. 
Five specimens at Rédberg on the precipices, 100-250 fath. 
79. Puncturella noachina, Linn. 
Trondhjem and Rodberg, 5-200 fath. 
80. Pilidium fulvum, Mill. 
Trondhjem and Rédberg, 5-40 fath. 
81. Acmea virginea, Miill. 
Specimens small, Rédberg, 0-40 fath. 
$2. Lepeta ceca, Miill. 
3-40 fath., Rodberg and Trondhjem. 
83. Patina pellucida, Linn. 
Rédberg, on Laminarie. 
84. Patella vulgata, Linn. 
85. Hanleyia debilis, Gray, = Chiton Hanleyi, Bean. 
100-250 fath., Rédberg and Trondhjem. 
86. Leptochiton alveolus, M. Sars. 
150-250 fath., Rédberg. 
87. Leptochiton cinereus, Linn.,=C. asellus, Chemn. 
5-10 fath. 
88. Trachydermon ruber, Linn. 
Shallow water. 
Var. candidus, Norman. 
A very pretty variety occurred at Rédberg, 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 albus, Linn. 
Shallow water, Rédberg. 
90. Trachydermon exaratus, G. O. Sars. 
200-250 fath., Rodberg. 
91. Tonicella marmorea, KF abr. 
Shallow water, Trondhjem and Rédberg. 
