157 



Check List of Canadiax Plants By J. M. Macoun. 8vo. Ottawa, 



1889. 50c. 



A very useful pamphlet has just been issued by our fellow member, 

 Mr. J. M. Macoun, in his complete (and corrected up to date) check list of 

 all the plants which have ever been found in Canada. Mr. Macoun 

 has had exceptional advantages in the pi'eparation of this list. As 

 assistant to his father, Prof. John Macoun, he has had the magnificent 

 collection of the Geological Survey to examine as to doubtful species. 

 The museum has now acquired most of the collections of the early bot- 

 anists of the beginning of the centurv. He has also had the benefit of 

 his father's assistance and advice. The use of check lists for all collect- 

 ors and explorers is very great. With a complete check list all that is 

 necessary, when a new locality is visited, is to piit a tick or a date 

 against the name of each species observed during the day, and thus a 

 great labour is saved at a time when the traveller is tii'ed out and dis- 

 inclined for the tedious work of writing a long list of names. We advise 

 every botanist in the club to secure copies while they are to be had. 



-:o:- 



A NEW CRUSTACEAN. 



In the Bulletin de la Society Zoologiqne de France for June, 188S, 

 S. A. Poppe, of Yegesack, Germany, describes a new species of Dia])- 

 toraus, a genus of fresh- water Copepoda, under the name, D. I'yrrellL 

 It is a small red crustacean, or "water-flea," about a twentieth of an 

 inch in length, with large oar-like antennae and one eye in the middle 

 of the head in front, but unlike the genus Cyclops, to which it is closely 

 allied ; the female carries but one lateral egg-sac. It occurs in great 

 abundance in Summit Lake, near Stephen, in the Rocky Mountains, 

 often coloring the water ai'ound the shore a brilliant red. From this 

 lake it was collected by our member, Mr. Tyrrell, of the Geological and 

 Natural History Survey, in the summer of 1883, and in whose honour 

 it is named. 



