Gymnosperms. 



734 



6500 



Protopiceoxylonf n. gen. [Coniferae]. 



Gothan. 37727. 

 — ■ extinctum. Gothan. 



PTEBOPffYLLUMf [Cycadaceac]. 



■ — monlanense n. comb. 



Knowlton. 38718. 



RhIZOC UPRESSINOX YLONf. 



liasinum. Lignier. 39138. 



Salicinoxylont n. gen. Lignier. 39138. 

 liradiatum. Lignier. 39138. 



Sequoia [Coniferae]. 



Haydeniif n. comb. Cocke- 



reU. 36676. 



TRiGONOCAKPUSf [Radiospermeae]. 

 naumhurgensis. Sterzel. 



41566. 

 Oliveri. Scott & Maslen. 



41261. 

 farkinsoniformis. Sterzel. 



41566. 

 subhexagonus. Sterzel. 



41566. 



WiLLiAMSONiA [Cycadaceae]. 



• delaivarensis'f . Berry. 



35973. 



Zamia [Cycadaceae]. 

 Ulei. Dammer. 38645. 



Zamites [Cycadaceae]. 



grandi.s-f n. nom. 



35659. 



Arber. 



6600 PTERID08PERMS AND 

 GYCADOFILWES. 



TITLES. 



Arber. 35660. The seed-bearing 

 habit in the Lyginodendreae. 



Berry. 35976, Origin of gymno- 

 sperms. 



Bertrand, C. E. 35985. Les carac- 

 teristiques du genre Taxospermum.. 



35987. Les caracteris- 



tiques du genre I.eptocaryon de Bron- 

 gniart. 



Horich, 0. 38243. Pteridospermeae ? 



Nathorst, A. G. 39931. The oldest 

 seed-plants. (Swedish). 



. 39936. 1. [Pseudocycas 



eine neue Cycadophytengattung aus 

 den cenomanen Kreideablagerungen 



Gronlands.] 2. [Die Kutikula der 

 Blatter von Dictyozamites Johnstruyi 

 Nath.] 



Oliver, F. W. -40083. [Structure 

 and affinities of Physosioma elegans 

 (Williamson), a pteridospermous seed 

 from the Coal-measures]. 



Sellards, E. H. 41299. The spore- 

 bearing organ Codonotheca and its 

 relationship with the Cycadofilices. 



Skottsberg, C. 41397. Zur Flora 

 des Feuerlandes. 



Zalesskij, M. D. 42517. Fossile 

 Flora des Steinkohlenreviers von Dom- 

 browa. (Russ. ) 



SYSTEMATIC. 



General. 



Berry, E. W. 35976 ; Hortch, 0. 

 38243 ; Nathorst, A. G. 39931 ; 

 Skottsberg, C. 41397. 



Special. 



Codonotheca. Sellards, E. H. 

 41299. 



Nathorst, A. G. 

 Bertrand, C. E. 



Dictyozamites. 



39936. 



Leptocaryon. 

 35987. 



Lyginodendreae. Arber, E. A. N. 

 35660. 



Physostoma. Oliver, F. W. 40083. 



Pseudocycas n. gen. Nathorst, A. G. 

 39936. 



Sphenopteris. Zalesskij, M. D. 

 42517. 



Taxospermum. 



35985. 



Bertrand. C. E. 



LIST OF NEW GENERA, SPECIES, 



Etc. 



Pseudocycasf n. gen. Nathorst. 39936 



insignis. Nathorst. 39936. 



■ — ■pumilio. Nathorst. 39936. 



Sphenopteris. t 



■ Bohdanowiczi. Zaslesskij. 



42517. 



