FONTAINE, ] THE EMMONS COLLECTION. 2938 
CTENOPHYLLUM BraUNIANUM ABBREVIATUM (Friedrich Braun) 
Schimper. 
Pl. XX XIX, Figs. 8, 9. 
1843. Plerozamites abbreviatus Fr. Braun in Minster: Beitriige zur Petrefactenkunde, 
Vol. II, Pt. VI, p. 30. : 
1843. Zamites obtusifolius Rogers: Trans. Assoc. Am. Geol. and Nat., Philadelphia, p. 
312, pl. xiv, lower left-hand figure. 
1857. Pterozamites obtusifolius (Rogers) Emm.: American Geology, Pt. VI, p. 118, 
fig. 85. 
1857. Pterozamites gracilis Emm.. Op. cit., p. 118, fig. 86 on p. 119. 
1867. Pterophyllum Braunianum var. 6 Schenk: Foss. Fl. der Grenzschichten des 
Keupers und Lias Frankens, p. 164, pl. xxxviii, fig. 2.1 
1870. Ctenophyllum Braunianum var. 8 (Schenk) Schimp.: Traité de Paléontologie 
Végétale, Vol. II, p. 144. 
Emmons, in American Geology, Pt. VI, gives on pp. 118-119 a 
description, with figs. 85, 86, of two cycadaceous forms, which are the 
var. 8, with shorter leaflets, of Géppert’s Ctenophyllum Braunianum. 
Numerous specimens were seen in his collection of cycad leaves that 
range in character from the smaller leaf, which he calls Pterozamites 
gracilis, to the larger form, which he names P. obtusifolius. Leaves 
with still larger leaflets, belonging, however, to this species, occur in 
the collection. Figs. 8 and 9 of Pl. XX XIX show common forms of 
the leaves seen. To judge from the number of specimens collected 
by Emmons, this plant must have been one of the most common ones 
in the Older Mesozoic of North Carolina. It was not seen in the 
Virginia strata. The leaflets are not quite so obtuse as Emmons has 
represented them in both his P. obdtus¢folius and P. gracilis. 
CTENOPHYLLUM LINEARE (Emmons) Fontaine. 
1857. Pterozamites linearis Emm.: American Geology, Pt. VI, p. 120, fig. 87. 
1883. Ctenophyllum lineare (Emm.) Font.: Older Mesozoic Flora of Virginia, 
Mon. U. 8. Geol. Survey, Vol. VI, p. 114, pl. liv, fig. 2. 
Emmons gives a description of a small cycad which he calls Ptero- 
zamites linearis. His fig. 87 is a very good representation of the 
plant, as is shown by the type specimen, which occurs in his collec- 
tion. Itis the only specimen seen of this cycad. It seems to be a 
Ctenophyllum of the same type as C. Braunianum var. f, and possi- 
bly may be a narrow abnormal form of it. It is, however, prob- 
ably a distinct species, as the leaflets are much narrower and more 
crowded than those of C. Braunianum vay. f. 
1§chenk here leaves no doubt that his var. 8 is the Plerozamites abbreviatus of Braun in Minster’s 
- Beitrige. It is therefore much better to restore Braun’s name with varietal rank than to perpetuate 
the awkward designation by a Greek letter. LFW. 
