Maryland Geological Survey 335 



It is a widespread older Cretaceous type, first found in the Barremian 

 Wernsdorfer schichten near Teschen in Austrian Silesia, and since found 

 in great abundance at various localities in the Neocomian of Japan. It 

 also occurs in the English Wealden, although Fontaine is of the opinion 

 that most of the forms which Seward so identifies are incorrectly de- 

 termined. Prof. Fontaine has also recorded this species from the Shasta 

 and Horsetown beds of California, and from the Glen Eose beds of the 

 Trinity Group of Texas. 



Occurrence. — Patuxent Forimation. Cockpit Point, Telegraph Sta- 

 tion (Lorton), Kankeys, Trents Eeach, Dutch Gap and vicinity, Vir- 

 ginia; Kew Eeservoir ( ?), District of Columbia. Arundel Formation. 

 Arlington ( ?), Maryland. 



Collections. — XT. S. National Museum, Goucher College. 



Genus PODOZAMITES F. Braun 

 [In Miinster, Beitr. Petref., Heft vi, 1843, p. 36] 

 This genus was proposed by Friedrich Braun for certain species for- 

 merly included in the genera Zamia Brongn. and Zamites Presl, which 

 had pinnate, distant, alternate leaflets contracted basally and with paral- 

 lel veins which converged at the base,- and usually at the apex. Zamites 

 distans of the latter author, a Ehsetic and Liassic form, becomes the type. 

 Braun's characterization is as follows : " Blatter gefiedert ; Fieder- 

 blattchen abwechselnd femstehend, durch zusammenziehung an der 

 Basis gleichsam gefusst. Nerven von der Austrittstelle an bogig, in der 

 Mitte fa^t grade und parallel zur Spitze der Fieder verlaufend." The 

 genus at this time included six species, embracing besides distans and 

 lanceolata four forms regarded by Braun as new species which, however, 

 were not named or described. Schimper emended the genus in 1870,^ 

 listing ten species, four of which were of Lower Cretaceous age and the 

 balance older. His diagnosis is as follows : " Folia magnitudine medi- 

 ocri, rachi tenui. Foliola distantia, patentia, oblonga, ovato- et lineali- 

 oblonga, apice obtuse acuminata vel rotundata, basin versus sensim an- 

 gustata, subpedieellata, pedicello defluente articulato, decidua, nervis ex 



^Pal. Veget., tome ii, 1870, p. 158. 



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