POST-TERTIARY FOSSILIFEROUS DEPOSITS. 33 



The followina; Ostracoda were found 



•o 



Cythere pelhcida, Baird. 



— porcellanea, Brady. 



— viridis, Miiller. 



— limicola (Norman). 



— villosa (G. 0. Sars). 



— concinna, Jones. 



— Dimehnensis (Norman). 

 Cytheridea papillosa, Bosquet. 



— pimctillata, Brady. 

 Cytherura niyrescens (Baird). 



4. Jordan Hill, near Glasgow. 



The Crow Road, on the side of which the clay is worked, is at that point sixty-three 

 feet above the sea-level. 



The clay extends down the incline of the hill, approaching the valley of the Clyde, on 

 the south, where it is exposed along the White Inch Railway, and also passes over its 

 summit on the north. 



Jordan Hill itself is irregularly covered with masses of Boulder Clay of variable 

 thickness ; the Boulder Clay, however, cannot be observed in any place to rest upon the 

 shell-beds. 



Our examination of one series of excavations, made to a depth of from twelve to 

 twenty- four feet, established the existence of the following series of beds ; their thicknesses, 

 as usual, varying over very narrow areas. 



1. Surface soil . . . . . . 1 to 2 ft. 



2. Reddish-brown clay (unfossiliferous) . . . 7 to 8 ft. 



3. Dark grey or blue clay (arctic-shell-bed) . . . 10 to 14 ft. 



4. Laminated clay or mud (not excavated because unfit for brick 

 unless mixed with other clays) .... 



The reddish-brown clay (2) is full of vertical fractures, whose sides have a bluish 

 colour, and are generally so smooth as to present the aspect of sUckensides. 



The laminated clay is friable, marked by exceedingly thin laminations, and is the 



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