NATURAL HISTORY SOCIETY OF GLASGOW. 97 



limestone in our coalfields, and the various districts wliere it has 

 long been extensively worked for economic purposes. He stated 

 that the Campsie district was not rich in fossils, yet it had yielded 

 as great a variety of this class of shells as any other limestone 

 with which he was acquainted. 



II. — The Secretary read a communication from Mr John Mason, 

 Dunbar, descriptive of a marine deposit extending from Belhaven 

 to Hedderwick, accompanied by a carefully prepared section 

 showing the various strata. The entire depth of the deposit 

 is about sixty feet, and consists of alternate layers of sand 

 and laminated clay. Mr Mason referred to the abundance of 

 shells in these beds, and also to the occurrence of the remains of 

 seals and other animals among the clay, concluding his paper with 

 a few observations on the general features of the district. 



III. — On Alternate Generations. By Dr Scouler. 



The author carefully illustrated his subject by diagrams and a 

 large collection of specimens. 



October 25th, 1864. 



John Scouler, M.D., LL.D., F.L.S., President, in the chair. 

 Mr Alexander M. Lang was elected a resident member. 



SPECIMENS EXHIBITED. 



Mr David Eobertson exhibited an undescribed Cuma; and, 

 as far as known, a species new to science. It is nearly allied 

 to Cuma Edwardsii, but differs from it chiefly in having the 

 carapace terminating in front, in an acute point; in the first 

 joint of the caudal appendage being plain; in the internal 

 terminal scale being single jointed; in the external terminal scale 

 having a short and long joint; and in both the scales tapering to 

 the base of the terminal spine, 



Dr Scouler introduced to the notice of the meeting two casts of 

 the ancient crania found at Engis, in Belgium, and Neanderthal, in 

 Germany. These crania were interesting on account of the 

 antiquity assigned to them, as well as from their remarkable 



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