400 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



not think the shops among them have ever so many 

 as fifty stones exposed for sale. They are rarely to 

 be met with in the curio-shops of Hankov7, and are 

 hardly ever to be seen in those of Shanghai. He 

 says they are not found in the gorges above 

 I'chang, but has heard of many being seen in the 

 rocks in the north-east of the province of Hunan. 



The I'chang specimens are all imbedded in a grey 

 limestone, while those referred to by Dr. Hochstetter, 

 and those in the British Museum, are in a dark 

 reddish-brown limestone, and must come from a 

 different part of the country. As one of the latter 

 was purchased in Canton, it is probable that it was 

 broLight from some place in the West, perhaps from 

 Yunnan, down the Si-Kiang river to Canton. An 

 imitation article may be picked up in some shops, 

 presumably at a moderate cost; of these there are 

 two examples in the British Museum. They are 

 coloured to represent the limestone, and have an 

 Orthoceras painted in the centre with a smaller one 

 on each side of it, and are mounted in a handsome 

 frame. 



The largest of the specimens exhibited (Mr. Cock- 

 burn's) is 24J inches in length, and 3J in breadth at 

 the edge of the chamber, where it has been broken 

 off. It is a central section showing the siphuncle 

 on one surface, but there is no appreciable differ- 

 ence in the breadth on either side. Mr. Dowsley's 

 specimen is 22^ inches in length, and 2^ in breadth 

 at the edge of the broken chamber. It is not a 

 central section, but a slice outside the siphuncle, 

 and the other side of the section is i of an inch 

 narrower. Both sections are about | of an inch in 

 thickness. The specimen in the University Museum 

 here is 13 inches in length, and 2J in breadth at the 

 edge of the chamber, and is what I may call the out- 

 side slice of the fossil. It is thus a short specimen 

 compared with Mr. Dowsley's, and the latter is 

 narrower throughout than Mr. Cockburn's, and its 

 chambers are more uniform in depth. There is 



