112 Dr. R. H. Traquair — Fifeslnre Carhoniferoiis Fishes. 



Dipnoi. 



28. Gtenodiis interraptus, Barkas. Pittenweem. 



Incerta sedis. 



29, Eucentrurus paradoxus, n. g. and sp. Ardross. 



CARBONIFEROUS LIMESTONE SERIES. 

 Elasmobranchii . 



1. Petalodus acuminatus, Ag. Ladedda, near St. Andrews. 



2. Oraeanthus armigerus, Traq. Largo Ward. 



3. Sphenacanthus serrulatus, K^. Denhead Ironstone, Denhead, near St. Andrews ► 



4. Acanthodes, sp. Denhead. 



Teleostomi. 

 Crossopterygii. 



5. Rhizodus Hibberti {A.g.). Denhead. 



6. Bhizodus ornatus, Traq. Denhead. 



7. Megaliehthys, sp. Denhead. 



8. Monichthys Bobisoni (Rihhext). Denhead. 



9. Hlonichthys pectinatus, Traq. Denhead. 

 10. Eurynotus crenatus, Ag. Denhead. 



The above list contains all the species, thirty in number, which 

 are contained in the Natural History Department of the Edinburgh 

 Museum or in my own collection. Mr, Kirkby, however, records 

 Ctenacanthus, sp., from near the Eock and Spindle, and Pcecilodiis 

 obliquus, Ag., from a marine limestone of Calciferous Sandstone ag© 

 on the coast near Randerston Castle. 



Notes on Species. 



Biplodus. — I have found small Diplodus-teeth. in shales on the 

 shore at Pittenweem, but which can hardly be safely identified 

 with any known form or considered as new. 



Cladodus unicuspidatus, n.sp. — Base flat below, depth from back 

 to front about two-thirds the width from side to side, contour more 

 convex in front than behind. A single slender pointed cusp arises 

 from the middle of the front of the base, and is erect, straight when 

 seen from the front, sigmoidally recurved when viewed laterally, 

 covered with delicate raised ridges, which increase in number 

 downwards by intercalation. No trace of lateral cusps. Height of 

 cusp of most perfect specimen -j^ inch, width of base laterally about 

 the same. 



Under the term Mbnocladodus, Professor Claypole ^ has separated 

 from Cladodus, Agassiz, two species from the Cleveland shale, on 

 account of the apparent want of lateral cusps. Allied to Cladodtis, 

 and also possessing only one cusp, are Lambdodus and Hyhocladodus 

 of St. John and Worthen.^ The present teeth, however, agree so 

 closely with Cladodus in all respects, save the want of lateral cusps 

 and the comparatively short lateral extent of the base, that I prefer 

 leaving them with that genus for the present. 



A cluster of these teeth was found by myself many years ago 

 in a septarian nodule on the shore near the Eock and Spindle, east 



1 American Geologist, vol. xi (1893), p. 329. 

 - Geol. Surv. Illinois, vol. vi. 



