58 PATHOLOGY [BoT. Absts., Vol. IX, 



383. Reynolds, S. H. The lithological succession of the carboniferous limestone (Avonian) 

 in the Avon Section at Clifton, Bristol. [Abstract.] Ann. and Mag. Nat. Hist. 7: 255-256. 

 1921. — Among other things regarding the rocks of the Avon Section the author saj^s that 

 the 3 Modiola phases (calcareous-Iagoon phases) of Kn, C2-S2, and the top of S2 recognized 

 by Dixon in Gower, are represented in the Avon Section, and that with them are constantly 

 associated calcareous algae. The upper S2 Zone is largely algal in origin, the Cotham-Mar- 

 ble-like layers consisting of Mitcheldeania or Spongostroma. The former is the most per- 

 sistent calcareous alga, ranging from the base of the section to the top of S2. OrUmella is 

 characteristic of the K beds. Solenopora is also found here. Spongiosti'oma is the prevalent 

 organism in many of the calcite-mudstones of C2 and S. Girvmiella is found in Di, and Aph- 

 ralysia in C2 and S. The "Seminula-pisolite" structure of Vaughan proves to be of algal 

 origin. [From author's abstract of a paper read at the meeting of the Geological Society.] — 

 H. H. Cluvi. 



384. ScHiTCHERT, C. Evolution of geologic climates. Amer. Jour. Sci. 1: 320-324. 1921. — 

 Knowlton's conclusions that climate in the past was uniform and mild is criticized, and it is 

 concluded that "throughout its history the earth has had temperature zones, varying from 

 an intensity as marked as that of today to almost complete absence, so that the greater part 

 of the earth had an almost uniformly mild climate, without winter." — E. W. Berry. 



385. Stevens, Neil E. Two petrified palms from interior North America. Amer. Jour. 

 Sci. 1: 431-443. Fig. 1-16. 1921. — Pahnoxylon cheyennense is described in detail from the 

 Pierre Cretaceous of South Dakota, and Palmoxj/lon cannoni from the lower part of the Den- 

 ver formation (Eocene) of Colorado. — E. W. Berry. 



386. T., H. H. [Rev. of: Scott, D. H. Studies in fossil botany. Vol. 1, Srd ed., 8vo., 

 4S4 p., 190 fig. A. & C. Black: London, 1920.] Jour. Botany 59: 53-55. 1921. 



387. Twenhofel, W. H. The Comanchean and Dakota strata of Kansas. Amer. Jour. 

 Sci. 49: 281-297. 1920. — The paper contains a number of references to the Dakota flora. — 

 T. J. Fitzpatrick. 



388. WiELAND, G. R. Paleobotany as viewed by two geologists. Science 53: 437-439. 

 1921. — A note on geological climates. — E. W. Berry. 



PATHOLOGY 



G. H. Coons, Editor 

 C. W. Bennett, Assistant Editor 



(See also in this issue Entries 5, 6, 15, 27, 30, 39, 40, 46, 47, 48, 50, 58, 82, 91, 139, 230, 235, 

 288, 349, 352, 353, 362, 363, 364, 365, 366, 367, 370, 529, 530) 



PLANT DISEASE SURVEY; REPORT OF OCCURRENCE AND SEVERITY 



389. Anonymous. Report on the prevalence of some pests and diseases in the West Indies 

 during 1918. West Indian Bull. 18 : 34-CO. 1920. — A compilation from the reports of the prin- 

 cipal agricultural officers in each of the colonies under the auspices of the Imperial Depart- 

 ment of Agriculture. The degree of prevalence of the various diseases attacking local crops 

 is given with suitable notes. — J. S. Dash. 



390. Butler, E. J. Report of the Imperial Mycologist. Sci. Kept. Agric. Res. Inst. 

 Pusa 1919-20: 58-67. 1920. — The report is a statement of progress in a number of lines of 

 investigation. In "black band" of jute {Corchorus olitorius and C. capsularis), caused by 

 Diplodia Corchori Syd., red-stemmed varieties are found to be slightly less susceptible than 

 others; treatment of seed with fungicides is of little value, as the spores are not disseminated 



