No. 2, December, 1921] PALEOBOTANY 101 



Araucarioxylon from Indo China are described together with traces of fungal and bacterial 

 parasites contained in the silicified wood, of probably Rhaetic age. — E. W. Berry. 



639. CoLANi, M. Sur quelques vegetaux Paleozoiques. [Upon several Paleozoic plants.] 

 Serv. G6ol. Indochine Bull. 6': 1-21. F'l. 1-2. 1919. — Annularia?, Arlhropitusf, Lepido- 

 dendron C, and various other doubtful objects from Yunnan from a horizon believed to be 

 upper Devonian are recorded. — E. W. Berry. 



640. CoLANi, M. Sur un Dipterocarpoxylon annamense nov. sp. du Tertaire suppose de 

 I'Annam. [On a new species of Dipterocarpoxylon from the supposed Tertiary of Annam.] 

 Serv. G^ol. Indochine Bull. 6': 1-8. PL 1-2. 1919. — A petrified Dipterocarp from the sup- 

 posed Tertiary of Annam is described. — E. W. Berry. 



641. Davies, D. Ecology of plants from the Westphalian and the lower part of the Staf- 

 fordian Series of Clydach Vale and Gilfach Goch (East Glamorgan). [Abstracts.] Ann. and 

 Mag. Nat. Hist. 7: 144. 1921. — A generic record has been made of 45,000 plants taken from 

 10 horizons of these regions. In any 1 horizon the generic proportion remains the same, but when 

 horizons are taken vertically there is often a complete alteration of balance. Equisetales 

 occur on 4 horizons, Filicales on 3, Pteridosperms on 3, Lycopodiales on 2, and Cordaitales on 

 1. ^Yhen Lycopodiales are dominant, Filicales and Pteridosperms are rare, and vice versa. 

 It is thought that physical changes caused this alteration of balance of plants. [From 

 author's abstract of a paper read at a meeting of the Geological Society.] — H. H. Clum. 



642. [Drtjce, G. C.] [Rev. of: Small, James. Origin and development of the Compositae 

 (contd.). Reprint from New Phytologist 18: 1-35, 65-91, 129-176, 201-234. 1919 (see Bot. 

 Absts. 3, Entries 1142, 1979; 5, Entry 720; 6, Entry 452).] Bot. Soc. and Exchange Club British 

 Isles Rept. 5: 614. 1919 [1920]. 



643. Edwards, W. N, Note on Parka decipiens. Ann. and Mag. Nat. Hist. 7: 442-444. 

 PI. 12, fig. 4-5. 1921. — Two specimens of Parka decipiens Fleming in the British Museum 

 (Natural History) found in the lower Old Red Sandstone of Canterland, Kincardineshire, 

 support the view that Parka may have been stalked rather than an entirely independent or- 

 ganism. Both of these specimens are stalked, and 1 shows the stalk attached to a stouter 

 axis. As this one is smaller than any previously found, it is thought that Parka may have 

 been attached only in its 3'ounger stages. — H. H. Clum. 



644. Edwards, W. N. On a small Bennettitalean flower from the Wealden of Sussex. 

 Ann. and Mag. Nat. Hist. 7: 440-442. PL 12, fig. IS. 1921.— A specimen in the British :Mu- 

 seum (Natural History) registered as "Wealden, near Hastings," consists of a whorl of bracts, 

 thought to be sporophylls, radiating from a prominent central region. Little could be dis- 

 cerned of the structure of the central region, but some microspores were obtained. The speci- 

 men is thought to belong to the genus Williaynsoniella, and the name Williamsoniella valdensis 

 is proposed. — H. H. Clum. 



645. E[dwapds], W. N. [Rev. of: Seward, A. C. A text book for students of botany and 

 geology. Vol. IV. xvi + 5^3 p., fig. 630-818. Cambridge, 1919.] New Phytol. 19: 277-27S. 

 1920. 



646. F[yson], p. F. [Rev. of: Arber, Agxes. Water plants, a study of aquatic angio- 

 sperms. xvi + 436 p., 171 fig. Cambridge Univ. Press: 1920 (see Bot. Absts. 9, Entry 374).] 

 Jour. Indian Bot. 2: 155-155. 1921. 



647. Halle, T. G. Psilophyton (?) Hedei n. sp., probably a land-plant from the Silurian 

 of Gothland. Svensk Bot. Tidskr. 14: 25S-2G0. PL 1. 1920.— The author describes what 

 appears to be a species of Psilophyton from an outcrop in Gothland of Silurian age and corre- 

 lated with the Lower Ludlow of Britain. — E. \V. Berry. 



