908 FLORAL ZONES OF THE POTTSVILLE FORMATION. 



Cardiocarpon corxutum Dn. 

 PI. CXCIII. Fig-. 1(1. 



Specimens agreeing- with iii:itcri:il from the ty])e locality at St. John, 

 New Brunswick,^ occiiu in the Southern Anthracite field in the vicinity 

 of Lyken.s coals '2 and 3 at the New Lincoln mine, and at 550 feet 

 below the Twin eoal in t\\o Tottsville Gap. 



Cardiocarpon biscupidatum (Sternb.) XcmI). var. ohioense n. var. 



The doul)t expressed ))y Dr. Newl)erry~ as to the identity- of the 

 fruits in the roof of eoal No. 1 (Sharon) with the type described by 

 Stern t)erg-^ seems to ])e fully justilied by a comparison of the mate- 

 rial representing- the American form from Ohio, Penns3Tyania, Ten- 

 nessee, and Arkansas with the lig-ures published by Sternberg. The 

 specimens from the Sewanee zone in our Coal Measures are much 

 broader proportionately, and larger, while ])ut the slightest trace of a 

 cusp is seen at the base in any example, the slight cusp at the apex 

 being often situated in the midst of the somewhat concave profile of 

 the upper margin of the nucleus. The Amercan type, as figured by 

 Newberry, and as represented in figs. 20 and 22, pi. ex of the Coal 

 Flora, I have distinguished as the var. oh'weme. This form, which 

 deserves additional illustration, I have nowhere seen below the Sewell 

 formation, or the Upper Lvkens division, although it ascends to near 

 the top of the Pottsville. Typical examples are found in the Southern 

 Anthracite field at the drift in the upper Lykens coal in Yellow 

 Springs Gap. and in the shale from a drift below the trolley road 

 on the east side of the gap at Pottsville, in a horizon 380 feet below 

 the Twill coal. 



Cardiocarpon eloxgatum Newb. 



The species described by Newberry* under this name represents one 

 of the most widely distributed and characteristic as well as compre- 

 hensive types of the Sewanee zone. Between it and the broader 

 forms, such as Cardiocarpon. late-alatmn '' Lx., there is a series of inter- 

 mediate forms, plthough few of the latter are at any point found in 

 the same l)eds. In the Southern Anthracite field, as in the region of 

 the Shai-on coal in northwestern Pennsylvania and northern Ohio, the 

 species is sometimes found associated with f'i/r/7/'oca/'j)on rnhi (/■'<'' and 

 C. aunHlatuiu. 



1 Dawson, Quart. Jour. Geol. Soc. London, Vol. XVIII, 1862, p. 324, pi. xiii, figs. 23, 24; Fossil Plants 

 of the Dc'voniim and Upper Silurian Formations of Canada, p. GO, pi. xix, figs. 214-21S. 



-Itept. Geol. Survey Ohio, 1.S73, Vol. I, Pt. II, p. 373, pi. xliii, figs. 9, 9ft. 



^ Flora d. Vorwelt, Vol.1, fa.se. 1, pi. vii, fig. 8. 



••Annals Sei., Cleveland, Vol. I, j). 153, fig. 0: Kept. (ieol. Survey Ohio, 1,S73, Vol. I, I'l. 11, i>. 373, 

 pi. xliii, fig. h. 



•'Lesfiuereux, Coal Flora, Vol. II, isso. p. ."itkS, pi. Ixxxv. figs. 40. 47. 



«NewlH-rry. Ilept. Geol. .Survey Ohio. I.s7:i Vol. 1. I'l. 11. ).. :'.73, pi. xliii. li.'. I. 



