WELLBURN : FISH FAUN A OF THE LOWER COAL MEASURES. 423 
Characters. — The margin of the dental crown is low, smooth, 
with the cutting edge comb-like, there being twelve blunt-pointed 
denticles which are covered with ganoine. 
Note. — The crown is almost identical %vith that of undoubted 
specimens in my cabinet from the Borough Lee Ironstone, near 
Edinburgh. 
Genus II. : Jaimssa Munster, 1832. 
Sp. ./. {li iiguai/'onuls Atthey ?). 
One tooth from the Halifax Hard Bed Coal. PI. LXT., fig. 6. 
Sub-order II, : Asterospondyli. 
Family A. : Cochliodontidap. 
Genus I. : Helodus. 
Sp. H. sp.? 
Teeth from the Halifax Hard Bed Coal. PL LXI., figs. 9 
and 10. 
Genus II. : Pleuropltiy A. Smith Woodw^ard. 
Sp. P. Pankinei Agassiz. 
Teeth from the Littleborough district. 
Characters. — Carina of the dental crown prominent and 
pitted (the result probably of abrasion, the crown being smooth 
when not abraded). Unsymmetrical, lateral " wings " moderately 
prominent. PI. LXI., fig. 7. 
Sp. F. Attheyi W. J, Barkas sp. 
Tooth from Halifax Hard Bed Coal. 
Characters. — Dental plate oval. Crown low and divided 
b}' deep transverse sulci. 
Family : Cestraciontidse. 
Genus : Sphenax^anthus Agassiz. 
Sp. Sphenacanthus sp. new ? 
The spine I refer to this genus is from the Lower Foot 
Mine, Littleborough district. The characters are somewhat 
peculiar, and do not seem to correspond with the specific 
diagnosis of any spine of this genus that I can find. It is most 
like Ctenacanthus denticidatus McCoy, but the general shape of 
the spines and the direction of the ridge ornamentation are 
different, also the ridges in the spine under discussion are 
D 
