380 
fish fauna of the lower carboniferous rocks of yorkshire, 
by edgar d. wellburn, l.r.c.p., f.g.s., etc. 
Introduction. 
In the above group of rocks I include the so-called Yoredale 
Rocks of the late Prof. Phillips, there being ample palaeontological 
evidence to show that the invertebrate fauna* of these upper 
beds are almost, if not quite, identical to those of the lower beds. 
Again, when we compare the list of fish remains given in this 
paper (all of which are from the upper beds) with a ]ist of those 
found in the Carboniferous Limestones of Derbyshire, the simi- 
larity of the fish fauna of the two is most marked. In Yorkshire 
the fish remains are found in the uppermost beds of the lime- 
stones, the most prolific beds as regards yield being the Main 
Chert or Red Beds at Harmby Quarry, near Leyburn Railway 
Station. Others have rarely occurred in the Crow Limestones 
above, and the Underset Hmestones below, both in the Leyburn 
area. Other specimens have been rarely found in upper hme- 
stone beds at Richmond, Settle, and Pateley Bridge. 
Family Cladodontid.^:. 
Genus Cladodus Agassiz, Pois Foss., vol. iii., p. 196. 
C. mirabilis Agassiz. ibid. 
Syn.: C. mucronaius J. W. Davis, Quart. Jour. Geol. Soc, 
vol. xl., p. 619. 
Detached Teeth : York and Brit. Mus. (Nat. Hist.), Author's 
col. 
Form and Loc: Carbonif. limestones, Wensleydale and 
Richmond. 
C. striatus Agassiz, ibid., p. 197. 
Syn.: C. elongatiLS Davis, i.e., p. 374. 
Syn.: C. Hornei Davis, I.e., p. 619., 
Teeth : York and Brit. Mus., Author's col. 
Form and Loc: Carbonif. limestones, Wensleydale and 
Richmond. 
*Dr. Wheelton Hind, F.G.S. Trans.. Eclin. Geol. Soc, Vol. vii., p. 342. 
