•jus PA LJSONTOL 00 Y OF NEW YORK. 



Of these thirty-four species, fifteen are recognized as Silurian, nine of them 

 occurring in the lower division, and three in each of the upper divisions. 

 Regarding the Upper Helderberg, Hamilton, Portage and Chemung groups as 

 Devonian, we have ten species in this period ; and including the Waverly 

 group with the Carboniferous limestones, we have nine species of Conularia in 

 this division of the series. 



In 18G7 M. J. Barrande enumerated twenty-seven species of the genus as 

 occurring in Bohemia; and in the Palaeozoic formations of all countries, he 

 enumerated eighty-three species, including one from the Lias (Systeme Silurien 

 du centre de la Boh'eme, pages 24 and 30). In this catalogue, however, there 

 are but fourteen species credited to the United States, while at this time 

 we enumerate thirty-four. The species of this genus described from the 

 rocks of this country have been more than doubled since that period, while the 

 number of new forms added to the European list must, we presume, have been 

 proportionally far less. 



Conularia undulata. 



PLATE XXXIII, FIGS. l-«, 7 ; AND PLATE XXXtV A, FIGS. 1=4. 



Conularia undulata, Conkad. Fifth Annual Report Pal. State of N. Y., p. 57. 1841. 



" " Hall : Descriptions of New Species of Fossils, etc., p. 34. 1861. 



" " Fifteenth Rep. N. Y. State Cab. Nat. Hist., p. 62. 1862. 



" " " Illustrations of Devonian Fossils : Pteropoda, pi. 5. 1876. 



grandis, Fbrd. Rckmer. Letliea Geognostica II Lief, p. 434, plate 3, tig. 21 ; and plate 1, fig. 12. 

 1857. M Distinguished from C. quadrisutcata by having the striae more crowded and 

 undulated, and by the absence of lines crossing the furrows between the striae." 



Form elongate-pyramidal, with a quadrangular base. Transverse section quad- 

 rangular, rhomboidal, with the faces subequal (equal ?) ; angles indented 

 by the longitudinal grooves. Faces of the pyramid slightly convex in 

 well-preserved specimens, often entirely flat, or sometimes concave, the 

 proportions modified from pressure ; center of each face marked by a 

 distinct shallow groove, along which there is a slight deflection of the 

 transverse striaj. Angles of the pyramid furrowed by a strongly marked 

 groove, which is conspicuous in all conditions of the shell, and traversed 

 by the surface-markings. Aperture of the fossil unknown. Summit 



