66 POST-TERTIARY ENTOMOSTRACA, 



Cytherura undata, G. 0. Sars. 



— Sarsii, Brady. 



— celldosa (Norman). 



- — clathrata, G. O. Sars. 

 Cytheropteron latissimum (Norman), 



— nodosum, Brady. 



— angulatum, Brady and Robertson. 

 Bythocythere constricta, G. 0. Sars. 

 Sderochilus contortus (Norman). 

 Paradoxostoma variabile (Baird). 



Polycope orbicularis, G. 0, Sars, 



20. Dyer's Burn, Port William. 



A section has been exposed by this burn, about half a mile from Fort William, a 

 little above the bridge. 



A brief account of this bed, with a complete list of its fauna, has been given by 

 Mr. J. Gwyn Jeffreys in the ' Transactions of the British Association for the Advancement 

 of Science ' for 1862. 



We observed the following particulars : 



Upon the schistose rock of the locality (over which the stream pours) rests a bed of 

 hard and stony clay. 



a. The lower part of this clay is crowded with fossils, which are intermixed with 



stones and pebbles of schist. To some of the stones Balani are attached, 

 h. The upper part of the clay contains some angular blocks with many stones 

 confusedly massed together, which have the appearance of having been 

 thrown down upon the shell-bed, possibly while it was in the process of 

 elevation. 

 The clay is about five to six feet deep, and in the lower foot the fossils are most 

 abundant. 



On the neighbouring hillside two beds of coarse gravel and shingle may be seen ; 

 the one, about forty feet above the sea, representing an old coast-line, the other, about 

 twenty-five feet above the sea, representing a more recent coast-line. 



Among the Mollusca included in the shell- clay are Columhella Holbollii, Littorina 

 limata, Margarita Groenlandica, &c. Mr. Jeffreys considers the whole group, however, 

 Scandinavian rather than Arctic. 

 Height above the sea nine feet. 



