,58 Notes and Comments. 



accompanied by many excellent illustrations of sections of the 

 plant described. 



HERTFORDSHIRE NATURALISTS. 



The Transactions of the Hertfordshire Natural History 

 Society and Field Club, two parts of which were published 

 during 1917, have long been looked upon as model publications 

 for a local Naturalists' Society. This is doubtless largely due 

 to the care exercised by the Editor, Mr. John Hopkinson. 

 The two parts before us contain valuable contributions on 

 almost every branch of Natural History, and all the articles 

 have a distinct bearing upon the county. Mr. Hopkinson, 

 among other contributions, has an interesting note on ' Rotifers 



Test of Nebala coUaris (inverted), inhabited by a rotifer. 



living in Rhizo pods' Tests,' from which paper we are permitted 

 to reproduce one of the illustrations. 



LIVERPOOL BIOLOGISTS. 



The Proceedings and Transactions of the Liverpool Biological 

 Society, Vol. XXXI., for the Session 1916-1917, is considerably 

 reduced in size (114 pages), doubtless as a result of the war, 

 though we notice the price has not changed. Among the 

 contents, besides the usual summary of Proceedings, etc., are 

 Presidential Address, The ' Economy of the Movement,' by 

 Prof. J. S. Macdonald ; ' Thirtieth Annual Report of the Liver- 

 pool Marine Biological Committee, and their Biological Station 

 at Port Erin (with an Address upon " Sir Wyville Thomson 

 and the ' Challenger ' Expedition) " by Prof. W. A. Herd- 

 man ; ' Report on the Investigations carried on during 1916, 

 in connection with the Lancashire Sea-Fisheries Laboratory at 

 the University of Liverpool and the Sea Fish Hatchery at Piel. 

 near Barrow,' by Prof. W. A. Herdman, Andrew Scott and 

 James Johnstone. 



Natttcatist, 



