232 SCIENCE PROGRESS 



other new species will fall under Eu-heterangium. This 

 interesting genus has long wanted revision, and this memoir 

 affords the chief contribution of the year to what may be 

 described as Anatomical Paleobotany. 



The Bennettitales are represented by a small paper by 

 Stopes (Ann. Bot. vol. xxxi.) in which some little rootlets with 

 remarkably pretty root-hairs are described as having been so 

 associated with Bennettites as to leave little doubt that they 

 belong to it. 



The Gymnosperms are represented by two anatomical 

 studies of fossil wood, both in the Annals of Botany, vol. xxxi. 

 One by the late Miss Holden on Palaeozoic stems from India, 

 in which she described two new species, Dadoxylon indicum 

 and D. Bengalense. The first specimen was unusual in show- 

 ing the pitting of medullary ray cells, and it was otherwise 

 very well preserved. Yasui described a Tertiary Sequoia from 

 Japan. 



This year I feel even more uncertain than usual that I 

 have been able to ascertain the whole year's harvest, as the 

 delays owing to the war have been quite exceptional, and, as 

 I hear from one of the most prolific of writers on the subject, 

 several authors are not sending out their work at all. 



ZOOLOGY. By Prof. Chas. H. O'Donoghue, D.Sc, F.Z.S., University 

 of Manitoba, Winnipeg, Canada. 



Owing to postal difficulties, certain journals for the period 

 under notice have not been available, but it is hoped to fill up 

 these gaps in the next review. 



Protozoa. — A great deal of work has of necessity been done 

 on the protozoan parasites infecting the troops, and in " Human 

 Intestinal Protozoa in the Near East," Pt. 5, by Wenyon and 

 O'Connor (Wellcome Bureau of Scientific Research, 191 8), we 

 have a report of investigations carried out in and around 

 Alexandria. The occurrence and spread of intestinal infec- 

 tions of protozoa in British troops and natives has been studied, 

 attention being paid to the carrier question. Three new pro- 

 tozoa from the human intestine are described and also sug- 

 gestions made for the diagnosis and treatment of amceboid 

 dysentery. 



Invertebrata. — Several interesting experimental studies have 



