588 E. ETHEEIDGE ON THE PALEONTOLOGY OE THE 



Zapheentis oefleyensis, Eth. (PI. XXVI. figs. 2, 2a.) 



Corallum gently curved, pediculate, about an inch in diameter ; 

 calice slightly oval; septa numerous (forty -eight), half of which 

 do not reach far into the calice ; chief septa thick or strongly deve- 

 loped ; the costae appear to equal the septa in number ; constrictions 

 in the corallum numerous, becoming stronger with age; septal 

 fossilise not determinable. 



The species are so numerous- in this widely distributed genus, and 

 they resemble each other so closely, that it is almost impossible to 

 compare one with another, especially when widely separated in 

 space; and their habit and growth so depend upon the circumstances 

 under which they lived that, homotaxially or in time-horizons, little 

 can be depended upon for determination. 



I therefore name these after the locality where found (Offley 

 Island), by way of drawing attention to the distribution of the 

 genus. Only portions of two corallites occur, and the coral is so 

 crystalline that most of its structure is obliterated. 



Loc. Offley Island, lat. 81° 16'. 



Zaphrentis, sp. allied to Z. peoliftca, Billings, fide Eominger, Geol. 

 Surv. of Michigan, vol. iii. 1876, p. 147, t. 53 (upper figures). 



Of this stunted species we have two specimens ; they both re- 

 semble Z. Ennislcitteni, M.-Edw. & Haime, from the Carboniferous 

 Limestone of Britain. The entire calice or septal system is not seen 

 on either specimen ; but the figures and description given by Eo- 

 minger (loc. cit.) answer to Billings's species, and they are undoubted 

 Zaphrentes. The corallum is turbinate, short, and pediculate, with 

 an expanded calice ; costse coarse. Owing to the calices not being 

 perfect, the number of septa remains unknown. Our specimens mea- 

 sure 1 inch and 1| inch in height, and about 1 inch in diameter. 

 Billings's species, Z. prolifica, occurs in the Corniferous Limestone of 

 Port Colborne, the Upper Helderberg Limestone of Michigan, &c. 



Loc. Dobbin Bay, lat. 79° 40'. 



Zapheentis, sp. (PL XXVIII. fig. 5.) 



This is the only single or simple coral found at Bessels Bay. It 

 occurs in the crystalline white limestone which abounds with Favo- 

 sites gotJilanclicus ; but the same beds evidently occur at Offley Island 

 and contain other species. I am not sure that this may not be a Clisio- 

 phyllum. In polished sections there appears to be a twisted colu- 

 mella ; but the calice is so crystalline that the relation of the septal 

 system at the edge of the calice cannot be well traced to the colu- 

 mella. 



#p. char. Corallum oval or compressed, nearly straight, tall, 

 roundly constricted at intervals ; costae numerous, delicate, or more 

 thread-like than in most Zaphrentes ; columella (if any) slightly 

 twisted ; septa about sixty, intermediate septa not seen, nearly all 

 structure being obliterated. 



Loc. Bessels Bay, 81° 6'. 



