590 R. ETHERIDGE ON THE PALAEONTOLOGY OF THE 



Class ECHINODERMATA. 



Many of the limestones are literally made up of Crinoidal remains, 

 chiefly stem-ossicula, yet in no instance has a really determinable 

 specimen been obtained. We have portions of the stems of Crotalo- 

 crinus somewhat abundantly, but the limestones are so crystalline 

 that all structure is obliterated. 



The white limestones of Bessels Bay contain Stromatopora and a 

 LitJiostrotion associated with these crinoidal fragments. No statuary 

 marble is whiter than these perishable limestones, which readily fall 

 to pieces upon handling. 



hoc. Bessels Bay, lat. 81° 6'. 



Class CRUSTACEA. 



Order TRILOBITA. 



Genus Bronteus, Goldfuss, 1843. 



Bronteus, sp., allied to B. hibernicus, Portlock, Geol. Rep. t. 5. f . 8. 



Half only of the pygidium of this species occurs in the white 

 limestone of Bessels Bay ; it is much larger than the caudal shield of 

 Bronteus flabellifer from the Middle Devonian of South Devon or the 

 Eifel form. It was collected by Mr. Hart, of the ship ' Discovery,' 

 from the white or pale-coloured limestones of the bay above men- 

 tioned. Comparison with Bronteus hibernicus, Portlock, Geological 

 Report, t. 5. f. 8, shows great resemblance ; but the single caudal 

 somite, from which spring the fan-shaped pleurae, is wanting, and 

 only half the pleurae are left. I have no alternative, however, but 

 to refer it to that species for close comparison. Four species have 

 been described from America — one from Nova Scotia, one from 

 Anticosti Island, and two from New-York State. 



Log. Bessels Bay, lat. 81° 6'. Upper Silurian. 



Bronteus elabellieer, Goldf. 



Brontes flabellifer, Goldf. Nova Acta Acad. Cass. Leop. Nat.-Cur. 

 vol. xix. pt, i. p. 361, t. 33. f. 3. 



Bronteus flabellifer, Phill. Pal. Foss. Dev. & Cornw. p. 131, t. 57. 

 f. 254. 



I have no doubt about this single pygidium belonging to the above 

 species ; there is no difference whatever between it and our Middle 

 Devonian Bronteus flabellifer. Mr. Hart collected this well-known 

 species from Bessels Bay, associated with the series of Upper Silurian 

 fossils found at that place ; it needs no further notice. I believe, 

 however, it is now recorded for the first time from the Upper Silurian 

 rocks, never hitherto having been found below the String ocephalus 

 or Middle-Devonian series of Britain and Belgium. 



hoc. Bessels Bay, lat. 81° 6'. 



