Geological Society. 213 



tertiary strata of the Sewalik hills, mixed up with bones of Sivathe- 

 rium, Camelus Sivalensis, Antelope, Crocodile, &c. The authors de- 

 scribe two species of giraffe. The first, which they designate Came- 

 lopardalis Sivalensis, is founded on the third cervical vertebra of an 

 old animal, and they infer it to have been one-third smaller than the 

 existing species. The bone is very perfect, and completely silicified. 

 It measures 8 inches, while the same vertebra of the existing species 

 is 11 1 to 12 inches. The. bone is more slender in its proportions than 

 the existing one, and exhibits a series of specific differences in addi- 

 tion to the size. The second species they name Camelopardalis affinis, 

 provisionally, from its close resemblance to the existing African Gi- 

 raffe, in form and size of teeth, &c. The species is founded on frag- 

 ments of the upper and lower jaws and on four detached molar teeth. 

 The dimensions agree to within the tenth of an inch with those of a 

 female head in the Museum of the College of Surgeons. The giraffe 

 bones were found along with those of Anoplotherium, Camel, Croco- 

 dilus biporcatus, &c., in clay and in sandstone in the Sewalik hills*. 



2. Prof. Sedgwick commenced the reading of a paper, in continua- 

 tion of his memoir, " On the Geology of North Wales," read June 

 21, 1843t. 



Nov. 29, 1843. — Professor Sedgwick concluded his paper. 



The author maintains the threefold division of the older rocks. The 

 middle division is now illustrated by more detailed sections, especially 

 through different parts of the Berwyn chain. The first and principal 

 section is from the porphyries of Arrenig eicross the Lake of Bala, 

 and over the crest of the Berwyns to Llangynog. The whole of this 

 section is placed in a fossiliferous system, and the thickness of the 

 beds actually associated with fossils is several thousand feet. The 

 difference between this result and one stated by Mr. Sharpe, is ac- 

 counted for, first, by a different computation of the thickness of cer- 

 tain beds about the position of which there is no doubt, and, secondly, 

 by a different interpretation of phsenomena, Mr. Sharpe terminating 

 his section abruptly against a supposed fault, while Professor Sedg- 

 wick makes a regular ascending section, and places in the highest 

 part of the series certain beds which Mr. Sharpe calls Cambrian, and 

 regards as a part of a lower and non-fossiliferous group. In short. 

 Professor Sedgwick extends his section among the fossil groups se- 

 veral miles to the east of the supposed line of fault of Mr. Sharpe. 

 Other sections are described, drawn through the southern part of the 

 Berwyns, which is shown to rest on a great trough formed by the 

 Bala limestone. The author then gives a general and detailed ac- 

 count of the physical structure of the whole Berwyn chain, which 

 measured, on the curved line of the water-shed, is not less than 

 thirty miles long. The whole crest of this chain, with the exception 

 of about five miles, is composed of beds superior to the Bala lime- 



* The first announcement of the fossil remains of the Gii-affe was made 

 by Capt. Cautley in the Journal of the Asiatic Society of Bengal, vol. vii. 

 p. 658 (15th July, 1838). 



[t The official abstract of the paper here referred to, of which that no- 

 ticed above was the continuation, will be found in our preceding volume, 

 p. 246.] 



