606 R. ETHERIDGE on the paleontology op the 



Log. Cape Louis Napoleon, lat. 79° 38'; Cape Hilgard, lat. 79° 41' ; 

 and Victoria Head, lat. 79° 12'. 



Maclurea Logani, Salter. 



Maclurea Logani, Salter, Report Brit. Assoc. 1851, Trans. Sect. 

 p. 63 ; Quart. Journ. Geol. Soc. vol. vii. p. 166, t. 8. f. 7 ; Geol. 

 Surv. Canada (Canadian Organic Remains), decade 1, p. 1, t. 1. 



This shell is decidedly distinct from M. magna, although in many- 

 respects closely allied. It agrees with our British species in every 

 particular. It is well figured and described by Salter in the Memoirs 

 of the Geol. Survey of Canada, Figures and Description of Organic 

 Remains, decade 1, pp. 1-10, t. 1. f. 1-6. M. PeacJiii, Salter, from 

 the Durness and Inch-na-Danff Arenig rocks, may be taken for 

 this shell. M. Logani becomes nearly as large as M. magna ; but 

 differences exist which cannot be discussed in a general notice. 

 No opercula have appeared in the series collected. M. Logani often 

 measures 3| inches across or in width, and differs from other spe- 

 cies by its extreme flatness on the lower or umbilical side, and few 

 whorls, as well as great depth of the whorl, which often exceeds 

 the width. 



Mr. Hart and Dr. Coppinger collected this species at Bessels Bay, 

 lat. 81° 6'. 



Genus Bellerophon, Montfort, 1808. 

 Bellerophon, sp. 



"We have two specimens, probably of two species, of this genus, but 

 neither of them complete ; and whether the mouth- aperture was 

 much expanded cannot be determined. The median keel was evi- 

 dently well developed, and strong lines of growth pass off nearly at 

 right angles to the keel and are reflected backwards towards the 

 umbilicus. 



Our specimens may both be inner portions of the shell, or the 

 first portions of the spiral coils. "We can therefore do little more 

 than record the occurrence of Bellerophon. The American Silurian 

 rocks contain thirty species of this genus, and the European sixty 

 species, seven of which are common to the two hemispheres. 



Loc. Bessels Bay, lat. 81° 6'. 



Class CEPHALOPODA. 



Few Cephalopoda have been collected, four species of OrtJioceras 

 and one Cyrtoceras being all brought home. The distribution of the 

 order Tetrabranchiata in time is a problem of great interest. The 

 seas of the globe during every epoch from the Silurian to the present 

 day have held this Order. It is the oldest of the two, and attained 

 its maximum in the Palaeozoic periods, being now represented only 

 by one species (Nautilus jpompilius), confined to the warm seas of 



