348 Palaeontologie. — Algae. 



which the central axis is well preserved. but the cortex is in a largely 

 desintegrated State. In the same block leaves are associated one 

 portion of which is in organic connection with an axis which appears 

 to be a petiole or rachis of Stenomyelon. The plant, so far as it is 

 known. is described and very well illustrated. The genus and spe- 

 cies are diagnosed as foUows: Stern monostelic, primär}'- X3'-lem 

 without xylem parenchyma, divided more or less distinctly into 

 three lobes b}^ as many radiating and interrupted bands of paren- 

 ch3^ma. Primary tracheae poröse on all walls. The protoxylems of 

 the leaf-trace decurrent as exarch Strands on the extremities of the 

 lobes. Secondary thickening occurs. Secondary tracheae. with poröse 

 pits on radial walls only. MeduUary rays numerous. Stele closely 

 invested by a zone of sclerotic periderm. Leaf-traces depart succes- 

 sively from the extremities of the lobes and repeatedl}"^ divide in 

 the cortex. Leaf-trace protox3dems become immersed. Outer cortex 

 of the "Sparganum" type. The authors do not go ver}'' füll}?- into 

 the affinities of the plant, which the}^ consider to be widely separa- 

 ted from Siitcliffia insiguis (witli which one might otherwise com- 

 pare it) by the absense of independent meristeles in the cortex. 



M. C. Stopes. 



Knowiton, F. H., Results of a Paleobotanical study of 

 the Coalbearing rocks of the Raton Mesa Region of 

 Colorado and New Mexico. (Am. Jour. Sei. (IV). 35. p. 526 — 

 530. 1913.) 



This paper is in the nature of an abstract of a monograph in 

 press describing the fiora of the Cretaceous and Eocene rocks of 

 the Raton Mesa, coal fields. The total flora embraces 257 species 

 of which 106 Coming from the Vermejo and Trinidad formation 

 are Createcous while 151 Coming from the Raton formation are 

 Eocene. A v/idespread unconformit}^ separates the Cretaceous from 

 the Eocene in the area studied only 4 species being found to 

 survive from the Cretaceous into the Eocene. 



The Cretaceous is correlated with the Montana group and the 

 Eocene with the Denver formation of the Denver basin. 



The Eocene flora is shown to have a considerable representation 

 of species belonging to the Lower Eocene (Wilcox Group) flora of 

 the Mississippi embayment area. Berry. 



Stevens, N* E., A Palm from the Upper Cretaceous of 

 New Jersey. ^Am. Jour. Sei. (IV). 34. p. 421—436. tf. 24. 1912.) 



This paper describes the anatomy of the lower stem and root 

 of a new species of palm based on a remarkable silicified specimen 

 from the Upper Cretaceous near Seabright, N.J. It receives the 

 name Palmoxylon anchorus sp. nov. Berry. 



Conrad, W., Historique de l'Algologie en Belgique. (BüU. 

 soc. roy. Bot. Belgique. IL. fasc. 3/4. p. 271-293. 1912.) 



L'auteur donne, avec commentaires, la liste des travaux algo- 

 logiques publies sur la flore beige on par des botanistes beiges, 

 ainsi que Findication des herbiers les plus importants. 



Henri Micheels. 



