J. M. Clarke — Clymenia in Western New York. 61 



were long ago described by Phillips and McCoy and more re- 

 cently the position of the Clymenia beds in South Devon 

 (Lower Dunscombe) has been located by Ussher, Kayser, 

 Tschernyschew and Freeh. In his " Lehrbuch der geologischen 

 Formationskunde," recently published (1891, p. 109), I^ayser 

 states that the genus is limited to the uppermost Devonian. 

 Its presence therefore, in the Naples beds, at a horizon probably 

 not more than 200-250 feet above the top of the Genesee 

 shales, in association with a distinctly developed Intumescens- 

 fauna, is an unique phenomenon. 



The composition of this fauna in its first appearance in the 

 Styliola limestone of the Genesee shales and its reappearance 

 in the Cashaqua-Gardeau division of the Portage group has 

 been recently discussed by the writer in brief.* In the con- 

 cluding portion of my paper in the American Geologist atten- 

 tion was called to the abundance in the fauna of certain species 

 of coniferous woods, and to the observations made upon them 

 by their describers, Dr. Sir William Dawson and Professor 

 D. P. Penhallow. The most abundant of these species is the 

 Dadoxylon (Cordaioxylon) Clarkii Dawson, which Sir Wil- 

 liam has recently stated to be most near it its structure to 

 A.raucarites Ungeri Gceppert, from the Ctypridinen-schiefer 

 of Thuringia. Cladoxylon mirabile Unger, from the same 

 flora, was identified some years ago- by Dawson in the Styliola 

 layer. Of accessory importance is the occurrence of Kalymma 

 grandis Unger, (the original also from the Cypridinen-schiefer 

 of Saalfeld) from the Black (Genesee) Shale at Moreland, 

 Kentucky,f in association with a primordial goniatite not 

 unlike G. intumescens. Thus we have in our Intumescens- 

 zone a very important representation of the flora of the 

 Cypridinen-schiefer as developed in Thuringia, and though 

 the characteristic fossil, Entomis serrato-striata, is not known 

 to occur here, yet there is an undescribed Ahtomis, abundant 

 in places in the Styliola layer, which is not greatly unlike that 

 species. It does not yet appear that the New York Intume- 

 scens-fauna furnishes any forms especially characterizing the 

 cephalopod facies of the Cypridinen-schiefer (the Nehdener- 

 schiefer or horizon of Goniatites curvispina = middle Upper 

 Devonian of the Continent). Some collateral evidence of the 

 Clymenia kalk fauna, but not of the most satisfactory kind, is 

 furnished by the abundance of species of Tornoceras, Cardiola 

 retrostriata, an undescribed Bactrites, which may be compared 

 with B. carinatus, Minister, Loxonema Noe, not unlike L. 

 arcuatum Miinster; there is also a species of finely striated 



* Neues Jahrbuch fur Min., vol. i, p. 161, 1891; American Geologist, Aug., 

 1891. p. 86. 

 \ Discovered by Dr. 0. E. Beecher. 



