NAPLES FAUNA IN WESTERN NEW YORK, PART 2 2~] \ 



species now referred to this genus. This is an early Devonic shell, and the 

 generic type is a belated comer in the New York sea. 



Habitat. Genesee province; Chautauqua subprovince. Correll's 

 point, Lake Erie shore near Brocton and at Smith's Mills, Chautauqua co. 



loxopteria Freeh. 1891 

 In Loxopteria, proposed as a subordinate division of the genus Kochia, 1 

 there is a marked difference from K. capuliformis and K. u n g u 1 a 

 in the expression of the exterior, the larger valve being less conspicuously 

 elevated and arched and abruptly deflected on the posterior slope, with the 

 wing on this side clearly defined and standing almost at right angles to the 

 shell body. The smaller or right valve is depressed convex, operculum or 

 oyster-shaped, with a broad median depression extending radially back- 

 ward from the beak, leaving a low and broad radial elevation in front and 

 where elevated, explanate expansions behind. The posterior moiety of the 

 valve is bent upward toward the hinge line and thus forms a posterior wing 

 of notable size. Three species of this peculiar shell are known in the 

 German Devonic, all from high horizons in the formation. Loxopteria 

 d i s p a r Freeh (Avicula dispar Sandberger) occurs freely in the 

 higher Upper Devonic and the Clymenienkalk. 2 The two other species, 

 L. laevis and L. rugosa, have been described by Freeh (op. cit.) the 

 former from the Clymenienkalk of Wildungen and the latter from the 

 Upper Devonic of Beilstein. It is thus of noteworthy interest that the New 

 York Intumescens fauna furnishes species evidently identical with some of 

 these German shells and these too in considerable abundance in the 

 Chautauqua subprovince. The evidence of the close relation of these shells 

 to the Aviculidae, as inferred by Freeh and the other German authors, is 

 not altogether clear to us, except it be stated in this broad fashion : Kochia 



'Freeh. Op. cit. p. 76. 



2 See Sandberger. Versteinerungen des rhein. Schichtensyst. in Nassau. 1852. 

 pi. 29, fig. 14; Freeh, op. cit. 1891. p. 77, pi. 6, fig. 4-4I1; Drevermann. Die Fauna der 

 Oberdevonischen Tuffbreccie von Langenaubach bei Haiger. 1901. p. 146, pi. 16, 

 fig. 1. 



