192 Proceedings of the Werner ian Society, 



also in the undor jaw ; 10 molars in tlie upper jaw, 5 on each side 

 of the incisors, and 8 in the under jaw, or 4 on each side of the 

 incisors, making in all 22 teeth : — the colour of the upper part of 

 tho body, and external part of extremities, yellowish-grey ; face, 

 dark grey ; under part of body, inner side of legs, and lower part of 

 throat and neck, orange-yellow : — fur of two sorts, hairy and woolly, 

 the roots of the hairy portion being imbedded in, or surrounded by, 

 the woolly ; when a single hair is examined, it is found to be tipped 

 with black, white in the middle, and of a slate-grey below ; the fur 

 is particularly thick on the back, flanks, belly, outer side of limbs, 

 and especially on the cheeks, where the length of the hair changes 

 the apparent proportions of the head. 



Dr Traill expressed, in strong terms, how much we owe to the 

 scientific zeal and perseverance of Mr William Jameson of Saharun- 

 poor, for the transmission to his native city of such rare and valua- 

 ble specimens. He likewise made some interesting remarks on the 

 distinction between the Hemionus and the Onager, and exhibited the 

 figures given by Pallas and Ker Porter. 



At the same meeting Mr Robert Bald, mining-engineer, gave an 

 account of remarkable derangements occurring in the sandstone strata 

 at Binny Craig Quarry, occasioned by trap-dykes. Specimens of the 

 sandstone, now extensively used in building, were exhibited. It is 

 rather homogeneous in appearance ; but minute scales of mica can be 

 observed ; and it was mentioned that by noticing to keep these scales 

 always in a horizontal position, masons could with certainty place 

 their blocks in bed, where they remain unaltered by the weather, and 

 not on edges when^the mica is apt to permit the water to enter, 

 and, by frost, to occasion the splitting up of the stone. 



Professor Goodsir afterwards exhibited specimens alive, in sea- 

 water, of the polyp-like young of the Medusa aurita (the common 

 sea-blubber) ; also a group of the living Coryne squamata, in the 

 act of throwing off their medusa-like larvae. The young medusae 

 had been received that morning (in a well-protected phial, sent by 

 post) from Dr Reid of St Andrews, to whose interesting researches 

 on this subject, as well as to those of Sars and Seibold, he briefly 

 alluded. The locomotive sea-blubbers are, at first, when young, 

 small, fixed, polyp-like animals ; whereas the fixed or rooted polyps 

 are, when young, locomotive, and resemble minute sea-blubbers. 



