Mallo. 380 



Fontaine's Older Triassic Flora of Virginia, in U. S. G. S. Vol- 

 letin 6, 1883, pp. 18-22, plate 3, figs. 2, a young leaf, nat. size ; 

 3 tip of medium sized leaf, and part of its venation. Fructifica- 

 tion not clearly made out ; apparently elliptical sori, single 

 row on midrib, or two rows one each side of it. (See W. B. 

 Rogers' description " On the Age of the Coal Rocks of Vir- 

 ginia," Trans. Ass. Amer. Geol. & Nat.) Frond ^\ by 14 in- 

 ches ; 4 by 24 inches ; 6|- by 40 inches long, estimated from 

 fragments. (Reduced full grown leaf, PI. 4, f. 3, and much 

 reduced more blunted tip, PI. .4, fig. 4; also nat. size^ PL 5, 

 fig. 1 to 3 ; small acute leaf PI. 3, f. 1, la, 3 ; unusual form PL 

 4, f. 2 — all omitted here.) Midrib fleshy. Nerves compound 

 (See PL 5, f. 4a, omitted); and fruit? (PL 4, fig. 1,1a, omitted.) 

 Nearest ally M, gigantea^ European EhcBtic ; & M. lata. India. 

 It is the most widely diffused, abundant and characteristic 

 plant in the Mesozoic of Virginia, abounding near the main 

 Richmond coal, and from that to the top of the series ; often 

 alone ; commonly with Equisetum rogersi. It must occur in 

 Pennsylvania, at Phoenixville or elsewhere. — Trias. 



Mallotu^ villosus. See Appendix. 



Man. See Palaeolithic human skulls. 



Marsupiocrinites. See Lyrioerinus dactylus. F, h. 



Martinia lineata. See Spirifera lineata. XIII, 



Mastodon americanus, Cuv. Numerous fragments of this 

 extinct American elephant's teeth, scull,vertebr9e and leg bones, 

 belonging to a large and a small individual, were found in the 

 Port Kennedy cave, Chester Co., Pa. Cope, Proc. A. P. S. 1871, 

 p. 95. — Also from the Ohio river bed at Pittsburgh ; see K, p. 

 22. — Also a tusk in the Glacial Drift at Tunkhannock, Wyo- 

 ming Co. Pa. 67, pp. 20, 123. — Qzarternary or Postpleiocene, 

 See Collett's Indiana Report of 1881, page 33, and figures on 

 plate 3, f. 1, 2 ; plate 6, f. 1. — Human age. 



Matheria tener, Billings. Geology of Canada, 1863, page 



Geo/ C^n. J863 "^^^ K^^^r:^ .^^J^^ ^^ 



right valve ; c^ outside of left valve ; d., inside of same. Tren- 

 ton group., II G. 



