152 Meteorological Observations for 1884. 



The accompanying figures represent the three species referred 

 to in this article : — 



1 2 3 



No. 1. Diplotheca hyattiana var. caudata,^, with larval tube or 

 '.prosiphon. 



No. 2. Camerotlieca daniana with larval tube and septa above. 

 No. 3. Camerotheca gracilis (immature). 



a. is the larval region or space, having a thin flexible tube 

 '•with diaphragms. 



b. is the septate region, with thicker shell and septa sometimes 

 -calcified. 



c. is the body-cavity or chamber of habitation. 



VII. Meteorological Observations for 1884. 

 Br C. H. McLeod. 



The table on the succeeding page is an abstract of the meteor- 

 ological observations made in 1884 at the McGill College Observ- 

 atory, Montreal. The Observatory is situated at the height of 

 187 feet above the level of the sea. 



The greatest heat was 91.0 on August 21st; greatest cold was 

 23.5 below zero on Dec. 20th; extreme range of temperature was 

 therefore 114 ° .5. Greatest range of the thermometer on one day 

 was 37.6 on May 2nd ; least range was 4.0 on Nov. 28th. The 

 warmest day was Aug. 21st, the mean temperature being 81.15. 

 The coldest day was Dec. 20th, mean temperature 17.3 below 

 ^ero. The highest barometer reading was 30.964 on January 

 27th, the lowest 28.960 on January 9th, giving a range of 2.004 

 4jq.. for the month and year. The lowest relative humidity was 



