Dr. H. H. Traquair on Pakrozoic Fishes. 69 



Mr. Smith Woodward some years ago*. All doubt as to 

 the Selachian character of Mr. Newton's specimen is, how- 

 ever, removed from my mind by the occurrence of similar- 

 looking whorls of teeth in a small Selachian head in the 

 Powrie collection in the Edinburgh Museum, this head being 

 also from Turin Hill, Forfarshire, the same locality as that 

 from which the specimen in question is supposed to have 

 been procured. 



The only difference which I can see between these teeth 

 and those of Protodus is the anchylosis at their bases of the 

 teeth in antero-posterior succession — a difference precisely 

 like that which distinguishes Pleuroplax from Ilelodus. A 

 new genus might properly be created for this interesting form, 

 but it may be advisable to defer doing so for the present. 



I may also add that I strongly suspect Mr. A. Smith 

 Woodward's Onychodus anylicus from Herefordshire f to 

 belong to the same category ; certainly the specimen in the 

 British Museum does, though the original type in Oxford 

 requires re-examination. 



My best thanks are due to Sir A. Geikie and Mr. E. T. 

 Newton for their kind permission to re-examine this specimen, 

 which is in the Museum of Practical Geology, Jermyn Street. 



Farnellia tuberculata, gen. et sp. n. (PI. I. fig. 4.) 



One half of the remarkable specimen on which this new 

 genus is founded was exhibited by the late Rev. Hugli 

 Mitchell at the British Association at Aberdeen in L885, and 

 is now in the British Museum ; the other side is in the 

 Powrie collection in the Edinburgh Museum of Science and 

 Art. It is difficult to say which of the two should be con- 

 sidered as the " counterpart." 



Accompanying the British Museum specimen is a label in 

 Mr. Mitchell's handwriting with the name " Cosmiohpis 

 antiquus" the locality being given as Farnell. But the name 

 was never published, and, owing to its rather too close resem- 

 blance to Cosmolepis, preoccupied in 1858 by Sir Philip 

 Egerton for a Liassic Pakeoniscid, it can scarcely now be 

 adopted. 



The specimen is a mere fragment, showing a portion of a 

 vertebral column about 2 inches in length, most of the 

 vertebra 1 , about twenty in number, being seen only in im- 

 pression ; but those which remain show the ring-like centrum 

 which is characteristic of so many Palaeozoic fishes, such as 

 Pala'OsjjondyluS) Chondrenchelys, &c. Associated with this 



* Geol. Mag. (8) vol. ix. 1892, pp. 1-2, pi. i. figs. 1,1a. 

 t Geol. Mag. (3) 1888, vol. v. p. 500 : Cat. Foss. Fishes British 

 Museum, pt. ii. 1891, p. 392. 



