392 



APPENDIX. 



No. IV. 



the underlying carboniferons epoch. At tiie western 

 side of Intrepid Inlet I found upon the ice a consider- 

 able quantity of white asbestos, but did not ascertain 

 from whence it had been brought." 



The fossils thus found in situ, I have no doubt, belong 

 to the liassic period ; and as their geological interest is 

 indubitable, I offer no apology for inserting here the 

 following description, written by me on Captain M'Clin- 

 tock's return to Dublin from his third Arctic expedition. 



No. I. WILKIE POINT, Prince Patrick's Land (Lat. 76^ 20' N. ; 

 Long. 117° 20' W.). 



LIAS FOSSILS. 



(a) Ammonites M'Clintochi. Jouru. K. D. S., Vol. I. PI. IX. Figs. 2, 3, 4. 



Monotis septentrionalis. Jouru. E. D. S., Vol. I. PL IX. Figs. 6, 7- 



Pleuroiomaria, sp. Jourii. K. D. S., Vol. I. PI. IX. Fig. 8. 



Cast of some Univalve. Jouru. R. D. S., Vol. I. PL IX. Fig. 7. 



Nucula, sp. 

 (a) Ammonites M'Clintocki (Haughton). — Testa compressd, carinatd, 

 anfractibus lath, later ihus complanatis, transversivi undato-costatis ; costis 

 simplicibus, juxtd marginem irderiorem levigatls ; dorso cari'nato ucuto ; 

 aperturd sagittatd, compressd, antice carinatd ; septis lateribus i-lohatis. 



This fine ammonite resembles several species common 

 in the upper lias of the Plateau de Larzac, Sevennes, 

 in France. It approaches A. concavus of the lower 

 Oolite, but is distinguished by having only four lobes 

 on the lateral margins of the septa, and by its showing 

 no tendency to a tricarinated keel. The following 

 measurements give an exact idea of its form, as com- 

 pared with that of the species mentioned : — 



A. M'Clintochi. 

 A. conoavus 



Diameter 

 Inches. 



1-83 

 2-95 



Width of last 



Spire. 

 Diam.=100. 



St 



10(! 



.50 



TCO 



Tliickness 

 of last 

 Spire. 



105 



Overlapping 

 of last 

 Spire. 



1(50 



Width 



of 

 Umbilic. 



Too 



TUB 



The principal difference here observable is in the 

 somewhat greater size of A. concavus, and the larger 



