FAUNAL RELATIONS OF MANLINS LIMESTONE 351 



111 many places in the cement quarries of North Buffalo the upper 

 part of the Manlius limestone is rich in pyrite, which commonly occurs 

 in small cubes, not infrequently oxidized to limonite. Green stains of 

 malachite, probably from decomposed chalcopyrite, are not uncommon, 

 the latter mineral being disseminated in minute grains. Many of the 

 geode cavities contain scalenahedra or acute rhombohedra of calcite, as 

 well as sulphate of strontian. An analysis of the Manlius limestone of 

 the Buffalo cement quarry, made by Messrs P. N. Coupland and E. Fales, 

 students in the Rensselaer Polytechnic Institute, gave CaC0 3 47.23 per 

 cent and MgC0 3 19.25 per cent. A sample of the cement bed of the 

 Waterlime from Akron, New York, gave Messrs Gilmore and Reid 

 CaC0 3 35.60 per cent and MgC0 3 19.26 per cent* 



Faunal relations. — While the Bullhead limestone undoubtedly occu- 

 pies the position of the Manlius limestone of eastern New York, being 

 its stratigraphic equivalent, it is quite distinct from it in lithologic char- 

 acter as well as faunal contents. That the two types of deposits grade 

 into each other somewhere east of the Erie county line is, I believe, an 

 established fact. If, however, we compare the Manlius of Erie county 

 with that of the Helderberg mountains — that is, the well known Ten- 

 taculite limestone — we are forced to conclude that two distinct facies of 

 this limestone are represented within the state — an eastern calcareous 

 and a western dolomitic — each with its distinct faunal types, both, 

 however, showing unmistakable relationship. 



The following species have so far been found in this rock in Erie 

 county (see page 363 for descriptions) : 



Plants : 



Nemdtophyten crassum Penhallow, rare. 

 Actinozoa : 



Cyathophyllum hydrdulicum Simpson, common. 

 Brachiopoda : 



Orthothetes hydraulicus (Whitfield), common. 



Spivifer eriensis sp nov. 



Whitfieldella sidcata (Vanuxem). 



Whitfieldella cf. rotundata (Whitfield), rare. 



Whitfieldella cf. Isevis (Whitfield). 



A rhynchonelloid. 

 Gastropoda : 



Loxonema? sp. rare. 



Pleurotomaria ? sp. rare. 

 Cephalopoda : 



Trochoceras gebhardii Hall, rare. 

 Crustacea : 



Leperditia scalaris Jones, common. 



*Chamberlin, 1S77, p. 395, 



