ON THE SHELL-BEARING DEPOSITS AT CLAVA, AND OTHER PLACES. 493- 



No. ] Bore. — Depth, 30 and 40 feet ; ' brown clay and stones ' ; mud, 

 67 per cent. ; sand, 12 per cent. ; gravel, 21 per cent. 



Rhizopoda. 



Order Foraminifeka. — Sub-family Polymorphinince. Polymorphina 

 oblonga, D'Orbigny (2). 



Sub-family FiisuUnince. — Nonionina orbicularis, Brady (2) ; Nonionina 

 stilligena, D'Orbigny (3). 



Sub-family Polystomellince. — Polystomella striato-punctata, F. and 

 M. (1). 



No. 1 Bore. — Depth, 46 to 47 feet; rock samples 'soft brown con- 

 glomerated sandstone ' ; another parcel of similar chai'acter 330 yards 

 north-east of main pit near stream Allt Rnadh, 



No. 2 Bore. — ' Sand and fine gravel ' 15 feet thick to bottom of sand ; 

 sample from 1 to 16 feet ; mud, 25 per cent. ; sand, 50 per cent. ; gravel, 

 25 per cent. 



In this the proportion of gravel and coarse sand is very great, yet 

 the three largest stones weighed only one ounce. 



The ' floats ' contained two Foraminifera, Nonionina orbicularis, Brady, 

 and, as usual, a little vegetable matter and mica scales. 



There is no certainty that the two Foraminifera belonged to the clay 

 in which they were found, when we consider that we occasionally find in 

 the ' floats ' bits of recent plants, some still green, and there are so many 

 ways that such coald be carried, on workmen's tools, for example, or on 

 their feet walking over shelly clay. 



No. 2. Bore.— Depth, 18 to 20 feet ; ' dark blue clay ' ; mud, 50 per 

 cent. ; fine grey sand, 24 per cent. ; coarse sand and gravel, 6 per cent. 

 One of the stones was half the weight of all the others. 



Crustacea. 

 Order Ostraooda. — Cy there Dunelmensis, Norman (one valve). 



Rhizopoda. 



Order Foraminifera. — Sub-family PolymorpMnince. Polymorphina 

 lanceolata, Reuss (2). 



Sub-family Fufulinince. — Nonionina orbicularis, Brady (common) ;. 

 Nonionina Boneana, D'Orbigny (5) ; Nonionina depressula, W. & J. (4). 



Sub- family Polystomellm(e. — Polystomella arctica, P. & J. (rare) ; P. 

 striato-punctata, F. and M. (common). 



No. 2 Bore. — Depth, 20| feet, ' blue clay ' ; mud, 50 per cent. ; fine 

 sand, 38 per cent. ; gravel, 12 per cent, (small and mostly angular). 



MOLLUSCA. 



Family Littorinidce. — Lacuna divaricata, Fabr. ; Littorina obtusata^ 

 Linn. 



Crustacea. 



Order Ostraooda. — Family Cyilitridce. Cytheroptei'on latissimum, 

 Norman (1). Family Paradoxostomatidce. — Paradoxostoma abbreviatum,. 

 G. 0. Sars (1). 



