6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



" anterior " and the " main trap sheet," but become more abundant 

 above the latter, and attain their greatest abundance above the 

 uppermost trap sheet — the so-called " posterior trap sheet." Only 

 in these highest beds are found the well-known Saurischia: Anchi- 

 saurus colurus Marsh, A. solus Marsh, T hecodontosaurus polyzelus 

 (Cope), Anvmosaurus, Podokesaurus holyokensis Talbot, and the 

 Pseudosuchian Stegomosuchus longifes (Emerson and Loomis), 

 quite different from Stegcmius arcuatus. Numerous plants and fishes 

 are found in the " anterior " (lower) and " posterior shales " be- 

 tween the three large trap sheets. 



In the southern continuation of the Connecticut basin, through 

 New Jersey, Pennsylvania, Virginia, and North Carolina, a gradual 

 change in the character of the beds takes place. In New Jersey 

 and Pennsylvania the Trias is divided into three groups, at the 

 base the Stockton beds with red and sometimes shaly and argillaceous 

 sandstone from which come the remains of Rutiodon (?) Manhat- 

 tanesis (Huene), as published by Sinclair.^* In earlier times. Lea, 

 Leidy, and Emmons described Parasuchians from these beds. The 

 succeeding beds are the light colored Lockatong sandstones, and 

 above them the Brunswick series. In Virginia and North Carolina 

 ihe lowest division is often shaly in character and contains large coal 

 seams; the Phoenixville tunnel and Egypt are well-known localities 

 of this kind. Here are found plants, fishes, Labyrinthodonts, and 

 Parasuchians, the last two especially occuring in the lowest strata 

 with the coal beds. In the Connecticut Valley also the Parasuchians 

 are found only in the lower part. Lull's impression is that the Para- 

 t^uchians and Labyrinthodonts of the southern localities are from 

 lower horizons than the Saurichians of the Brunswick shales of the 

 Connecticut Valley.^^ DictyocephaXus from Virginia and North 

 Carolina, a near relative of Metoimsaurus^ must be middle Triassic. 

 The plants, especially abundant in the South, have been compared 

 by Fontaine,^^ and later by Stur " and by Ward,^^ with the flora of 

 the " Lettenkohle " from Lunz in the northern Alps, and from Neue 

 Welt near Basel. Jones considers the Ostracods as similar to those 

 of the German Keuper. The rich fish fauna was considered by 

 Agassiz and Newberry as equivalent to that of the upper German 



" Sinclair, W. J., Amer. Jour. Sci., vol. 45, 1918, p. 457. 



« Lull, R. S. Triassic life of the Connecticut Valley. Geol. Surv. Connecticut, Bull. 

 No. 24, 1915, p. 80. 



18 Fontaine, W. M. The older Mesozoic floras of Virginia. U. S. Geol. Surv., Monogr. 6, 

 1883. 



" Stur, D. Lunzer Flora in den older Mesozoic beds of the coal field of eastern Vir- 

 ginia. Verh. k. k. geol. Reichsanst. Wien, 1888, pp. 203-217. 



'8 Ward, L. F. Status of the Mesozoic floras of the United States. U. S. Geol. Surv., 

 20th Ann. Rept., pt. 2, 1900, pp. 211-315. 



