592 R. ETHERTDGE ON THE PALEONTOLOGY OP THE 



these somites may belong to Encrinurus Icevis ; they much resemble 

 each other in all parts but the cephalic region. See Journal of 

 Voyage in Baffin's Bay and Barrow's Straits (Penny) ; Sutherland's 

 Journal of Capt. Penny's Voyage to Wellington Channel, 1850-51, 

 vol. ii. p. ccxxi, t. 5. f. 14, for Encrinurus. 

 hoc, Hayes Point, lat. 79° 42'. 



Genus Encrinurus, Emmerich, 1844. 



Encrinurus ljsvxs (Angelin.). 



Cryjptonymus Icevis, Angelin, Palseontologia Scand. part 1, fasc. 1, 

 p. 4, t. 4. fig. 10. 



Encrinurus Icevis, Salt. Sutherland's Journal, vol. ii. p. ccxxi, 

 t. 5. f. 14. 



This genus, and probably the species now in the Arctic collection, 

 was obtained somewhat abundantly by Dr. Sutherland during the 

 Expedition under Captain W. Penny, 1850-51, associated with. Penta- 

 meri from Cornwallis Island ; the only species of Pentamerus then 

 brought home was Pentamerus conchidium, Dalm., a form much resem- 

 bling our Pentamerus Knightii, and similar to Greenland specimens. 

 I have compared the imperfect remains from Dobbin Bay, collected 

 by Dr. Coppinger and Captain Eeilden, with those brought home 

 by Dr. Sutherland, which Mr. Salter referred to Cryptonymus Icevis, 

 Angelin, and cannot detect any difference. The cephalic portion 

 (glabella and cheeks) very closely resembles our Encrinurus vario- 

 laris (Brongn.); the pygidium, however, differs essentially from 

 the same part in that species, being more massive, and the segments 

 of the axis not ornamented with tubercles. 



I cannot see any difference between the several imperfect portions 

 in our collection ; I therefore refer them all to Angelin's species. 



Dr. Sutherland's specimens were found at Cape Riley, on Griffith's 

 Island, Cornwallis, Seal, and Dundas Islands ; it appears to have 

 been abundant at Griffith's Island, lat. 75°. 



Dr. Coppinger collected his specimens at Dobbin Bay, lat. 79° 40', 

 associated with Meceptaculites, Favistella, Ilalysites, and Favosltes 

 gotldanclicus. 



Genus Proetus, Steininger, 1830. 

 Proetus, sp. 



One specimen, comprising parts of five thoracic somites and the 

 pygidium, is all we have of what I believe to be the genus Proetus ; 

 it occurs in a dark-grey earthy limestone from Cape Leidy, lat. 

 79° 38'. I can do no more than record this form as occurring in 

 the collection. 



Loc. Cape Leidy, lat. 79° 38', From Upper Silurian. 



