BRITISH ASSOCIATION MEETING. 



445 



regard the above described parts of the New Zealand fossils as being homo- 

 logous bones. But a more decided evidence of the plesiosaurian nature of this 

 antipodeal fossil is afforded by the vertebral centrums. They have flat arti- 

 cular ends, with two large and two small venous foramina beneath. The neura- 

 pophysial surfaces, showing the persistent independence of the neural arch, 

 are separated from the costal surfaces by about half the diameter of the latter. 

 These are of a full oval figure, one inch three lines in vertical, and one inch in 

 fore and aft diameter. On one side of one of the centrums the rib has coalesced 

 with the costal surface. The following are dimensions of this centrum : — 

 Length, one inch nine lines ; depth, two inches two lines ; breadth of articular 

 end, three inches six lines. The non-articular part of the centrum offers a fine 

 silky character. The shape and mode of articulation of the cervical and dorsal 

 ribs, the shape and proportions of the coracoids, concur with the more decisive 

 evidence of the vertebrae in attesting the plesiosauroid character of these New 

 Zealand fossils, and, pending the discovery of the teeth, the author provi- 

 sionally referred them to a species for which he proposed the name of Plesio- 

 saurus Australis. The specimens had been presented by Mr. Hood to the 

 British Museum. 



ON THE GEOLOGY OF KNOCKSHIGOWNA OR FAIRY HILL, CO. 

 TIPPERARY, IRELAND. 



By A. B. Wynne, F.G.S. 



In this paper the author described Knockshigowna as a conspicuous hill, 

 rising to a height of 701 feet above the level of the sea, and 400 above the 

 average level of the surrounding limestone plain, and being situated at a dis- 

 stance of six miles S.S. W. of Parsonstown, which is well known on account of 



Knockshigowna Hill — from the West. 



being the place where Lord Rosse has erected his great telescopes. The hill 

 is a narrow ridge about three miles long, in a S.S. W. direction ; its base in- 

 creasing in wictth towards the S. } at which end its most elevated point occurs. 



