ORISKANY FAUNA OF BECKAFT MOUNTAIN 81 



dryope, Eatonia peculiaris, Leptocoelia flabellites, 

 etc., all of which pertain to the fauna of the calcareous Oriskany 

 of New York. With these strong Oriskany traits the fauna 

 carries certain species which indicate the continuance of a still 

 earlier assemblage. Billings assigned to it some species of the 

 Helderbergian and though the majority of these identifications re- 

 •quire careful reconsideration there is in the organic content of 

 limestone no. 8 a notable constituent of Helderbergian origiu. It is 

 interesting to note that certain of the lower beds of division no. 

 8 specially at the exposure at Ship Head, Cape Gaspe, are com- 

 posed of a greenish sandy limestone, extending through a thick- 

 ness of not less than 150 feet. They evince thus, as do the 

 Oriskany beds of eastern New York a considerable siliceous 

 content though still to be regarded as calcareous deposits. Logan's 

 subdivision of the limestone series was given with lucidity and 

 exactitude but seems hardly to clothe this unique succession with the 

 dignity and importance it merits. Dr Ami has suggested that the upper 

 beds, 7 and 8, be termed the Grand Or eve limestones, from the little 

 village on the peninsula where these strata are best exposed and most 

 readily accessible. To Mr Charles Schuchert and the writer, who have 

 recently spent some time in this region, this name seems happily chosen 

 and we have thought that with equal propriety the lower beds, 1 

 and 2, exposed in the base of Mt St Alban along the shore of 

 Cape Rosier cove on the gulf of St Lawrence, may be called the 

 St Alban limestones, while the passage beds of Billings (no. 3, 4, 5, 6) 

 which are displayed in the fine 700 foot vertical escarpment at Cape 

 Bon Ami, west of Cape Gaspe, may receive the name of Cape Bon 

 Ami limestones. 



Logan and Dawson in referring to the interesting outcrop of " Silu- 

 rian " or " Lower Helderberg " rocks on the coast one half mile south 

 of Dalhousie, N. B., speak of it as "Cape Bon Ami." I have also ob- 

 served the locality thus given on specimens from there exhibited in the 

 fine museum of McGill university. Lest confusion arise from the dupli- 

 cation of this name, I may note that the little headland in question 



