. VII. OF RELIQUIA. 215 



Trans. R. Irish Acad. V. 5. p. 281. t. 4. Large 

 figure ??. ff 



Triangular Pleuronectite. 



Petrificatum saspe compositurn. 



Tractus secund. v etui us, irregulariter ? stratarius,, 

 trapezio-argillaceus. Secies : raassae ( fragmenta 

 strati ? ) superincumbentes, calcario-margaceae, 

 texturas recto-schistose. 



In the quarries of Monte Bolca, Italy. Very rare. 



DESCR. Rel. postissimum ossale Pleuronectis incog- 

 niti. Corpus trigonal e, longit. 7 Lat. 6 unc. 

 margine dorsali ( ab extremitatibus processuum 

 gpinalium superiorum formato) subarcuato, ab- 

 dominali (extremitatibus processuum spinalium 

 inferiorum et ossiculis thoracis diversis constante) 

 ad pinn. vent, rectangulo. Caput magnum, ob- 

 tusuin. Oculorum orbita? magna3, dextrae. Max- 

 illa inferior superiore paulo brevior. Branchia- 

 rum opercula subarcuata, glabra. Pinn. pecto- 

 rales minima?, rotundatae. Ventrales rainimac. 



Dors, et anal. ? Canda integra, magna. 



Vertebra3 thoracis abdominisqure 10. vel 12. 

 caudas 16. 



principles and some of the appendant terms, which we have en- 

 deavoured to establish in the foregoing pages. 



-ft We refer to this figure with much doubt : it has the general 

 orni of the specimens from which we made our description ; but 

 appears to differ in several particulars : as in the number of the 

 vertebra, shape of the head, &c. 



