422 Palaeontolosie. — Aljrae. 



ö*- 



Taxineae. Taxoxylon anglicum, sp. nov. twig. Podocarpoxylon 

 wohiivnense, sp. nov. wedges of secondary wood. Podocarpoxylon 

 bedfordense, sp. nov. an axis. Podocarpoxylon Gothani, sp. nov. small 

 decorticated branch. Podocarpoxylon Solntsii, sp. nov. (?) small brancb. 



Incertae Sedis. Vectia luccoinbensis, sp. nov. founded on a massive 

 secondary tissue which appears to be phloem. 



Dicotyledons. Cantia arborescens, gen. et sp. nov. founded on the 

 decorticated secondary wood. A large woody trunk, forming timber 

 30 cm. and more in diameter, with normal growth-rings. Wood 

 consisting of small quantities of fibre-tracheids and parenchyma , 

 with large numbers of isolated circular vessels uniformly distributed, 

 averaging 30 — 50 in diameter. Medullary rays numerous, all uniseriate, 

 all the ray-cells with thickened and pitted walls, numerous circular 

 or oval pits, sometimes bordered in the radial walls. Vessels pitted 

 variously, with round, oval and scalariform pits. Wood-fibres large, 

 round, bordered pits. An exact affinity cannot be suggested but 

 comparison is made with the Betulaceae, Magnoliaceae and Viburnimi 

 lantana. Woburnia porosa, Stopes, already described in Phil. Trans. 

 Roy Soc. B. 1912. Dipterocarpaceae (?). Sabidia Scottii, Stopes, already 

 described 1. c. Familj^ uncertain, Hythia Elgari, gen. et sp. nov. 

 founded on secondary wood. A woody trunk with or without growth- 

 rings. Wood consisting of fibre-tracheids, parench5'^ma and isolated 

 circular vessels uniformly distributed. Medullary ra5^s numerous, 

 multiseriate, some of the rays very broad and conspicuous; ray 

 cells of at least two kinds, the majority of the cells being very 

 much compressed and radially elongated and thin-walled. The shorter 

 bordering cells of the ray with thickened and pitted walls, with 

 groups of round to almost scalariform pits in the radial walls. Vessels 

 irregularly pitted with round pits merging into scalariform pits. 

 Aptiana radiata, Stopes, already described, 1. c. 



The following species are included separately in an appendix 

 as their age is rather doubtfu). They are possibly derived from the 

 Wealden and were found in the "Potton Sands". Cycadeoidea Yatesii, 

 Carruthers. Cycadeoidea bussardensis, sp. nov. vegetative trunks. 

 Colymbetes Edwardsi, gen. et sp. nov. Founded on the inner portions 

 of a trunk showing beautifully petrified analomical details. Trunk 

 probably cylindrical, reaching more than 12 cm. in diameter; 

 numerous gum canals, but no vascular Strands in the pith proper. 

 Ground-tissue cells of pith large, relatively thin-walled, all alike, 

 and without intercellular Spaces; starchy Contents frequent. Surroun- 

 ding the pith and following the outline of the inner bays of secon- 

 dar)^ wood, is a broad perimedullary zone, with numerous anasto- 

 mosing short radial series and groups of small tracheids. Outside 

 the bays of the vertically running secondary xylem, successive 

 zones, up to 10 in number and probabl}'- more, alternate, so that 

 zones cut radially in the transvetse section are cut transversely in 

 the true radial section. All the tracheids have scalariform pitting 

 on their radial walls, with wide borders and narrow slit-like pores. 

 Leaf-traces numerous, conspicuous, running nearly straight out 

 through the wood, arranged in close spirals. Bennettites inchisiis, 

 comb. nov. W. B. Turrill (Kew). 



Killian, K., Beiträge zur Kenn tn is der Laminarien. (Zschr, 

 Bot. III. p. 433 -494" und Diss. Freiburg. 62 pp. 1911.) 



Wir heben nur folgende wichtigere Ergebnisse aus der Inhalts- 



