910 FLOKAL ZONES OF THE POTTSVILLE FOKMATIOX. 



pyUir necks. T. inmJlum Brongn. is much shorter and more pointed, 

 besides having less distinct ribs. The type from St. John, New 

 Brunswick, which I have designated T. Dmosojiianum differs from 

 T. Ilelt-nw by its still more slender form and narrower acuminate 

 valves. This species is, in the central and southern Appalachian 

 regions, apparently confined to the Clark and Quinnimont formations: 

 and more particularly to the basal portion of the latter. In the 

 Southern Anthracite region the fruit has, however, a much greater 

 range, examples having been collected from the roof shales of Lykens 

 coals Nos. 4 or 5 at the Lincoln, Brookside, and Kalmia mines, and 

 from the upper Eureka tunnel. It also occurs in the rock dump from 

 the upper Lykens coals at the New Lincoln mine, as well as at the 

 supposed horizon of Lykens coals Nos, 2 and 3 in the Pottsville Gap, 



Trigonocarpum Dawsoniaxum sp. nov. 



Accompanying the specimens of a very narrow and rather small 

 Trlyonocarjmriu there occur in the same matrix numerous detached 

 valves which agree so completelv with the fragments figured by Daw- 

 son from the '" Fern Ledges" at St. John as ''fruits or bracts of uncer- 

 tain nature,'' that 1 have ventured to include a portion of the latter 

 material as well, in the same species. The figures given in the " Devo- 

 nian flora "^ will serve to illustrate the Pottsville material which I name 

 in honor of the late distinguished paleobotanist of America. The dif- 

 ferences between T. Dav'sonianum^ which will later be more fully 

 described and illustrated, and T. Tfelenm have already been indicated. 

 The species is found in the roof of Lykens coal No, -i at the Lincoln 

 mine and at the Kemble drift. It also occurs in the rock dumps at 

 P^ast Brookside and at the New Lincoln mine. Examples probably 

 belonging to the same type occur in the plant beds 550 feet below the 

 Twin coal in the gap at Pottsville. 



Carpolitiies transsectus Lx. 



Detached semicircular bracts, or possibly sporangiophores, identical 

 in form with those (h'scribed by Lescpiereux ' from the ''coal-bearing 

 shale" of Wasliington County, Arkansas, occur at a munber of locsili- 

 ties in the shales from the coals of the Upper Lykens division. Tlie 

 structure of the organ from which these small semidiscoid fossils are 

 derived is still uncertain. From their mode of occurrence and their 

 association. I am. however, disposed to regard them as possiblv belong- 

 ing to a strohih' simihir to or identical with that described 1)v Lesque- 

 reux'* as Li-j^ldocysfix (piadrauijuJdrix. 



> Fossil Plants of the Devonian and Upper Silurian Formations of Canada, 1871, pp. 64, 92, i)l. xix, 

 figs. 230a, 231, 231u-b (not fig. 230). 

 -•Cf)al Flora. Vol. Ill, p. H26, pi. cxi, figs. 27, 27a-l). 

 3 Op. tit.. Vol. II, p. 455, pi. l.xix, fig. 5. 



