514 



Meteorological Observations. 



Additions and Corrections to Mr. Davidson's Paper on the Classifi- 

 cation of the Brachiopoda. 



P. 364, insert f 3*. Ter. septigera, Loven, 1846 ; Index Moll. Scand. 



p. 29.— Hab. Finmark." 

 P. 371, Mr. Forbes's name " depressa " must be adopted for the Mor- 

 risia, because the name seminulum was intended by Philippi for 

 an Argiope, although his figure may have been taken from more 

 than one shell. 

 P. 373, line 13, for "only one" read "only one septum.'" 

 P. 373. 45. Argiope Forbesii. From examination of specimens in 

 Mr. Hanley's cabinet, it appears that this species is the Neapo- 

 litana of Scacchi, and in part, at least, the seminulum of Philippi, 

 Scacchi's name has priority of both the others. 

 P. 374, line 8, for branchial read brachial\ 

 P. 375, line 25, for "an exception" read " no exception." 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1852. 



Chiswick. — April 1. Overcast and cold: fine: clear and frosty. 2. Cold dry 

 haze : clear and frosty. 3. Slight fog : fine : clear. 4. Slight haze : overcast : 

 clear. 5, 6. Fine. 7. Cloudy. 8. Cold and dry : clear. 9. Very fine. 10. Clear : 

 hazy. 11. Foggy : very fine. 12. Hazy : clear at night. 13. Hazy : very fine r 

 clear. 14. Dry haze : fine, with very dry air : clear. 15. Foggy: slight haze. 

 16. Cloudy and cold. 17. Clear and fine. 18. Cloudy and cold. 19. Clear and 

 cold : cloudy : clear, with sharp frost at night. 20. Clear : very fine : sharp frost 

 at night. 21. Clear, with excessively dry air. 22. Foggy : fine : clear. 23. Fine, 

 with hot sun. 24. Boisterous. 25. White clouds : fine : clear and frosty at 

 night. 26. Clear : fine : clear and frosty. 27. Cloudy : frosty at night. 28. 

 Cloudy and fine : rain at night. 29. Rain : densely clouded. 30. Cloudy and fine. 



Mean temperature of the month 44°-81 



Mean temperature of April 1851 44*56 



Mean temperature of April for the last twenty-six years ... 47 "30 



Average amount of rain in April 1*65 inch. 



Boston.— April 1—4. Fine. 5—7. Cloudv. 8. Fine. 9. Cloudy. 10, 11. Fine. 

 12. Cloudy. 13, 14. Fine. 15—17. Cloudy* 18. Cloudy : rain a.m. 19. Cloudy. 



20, 21. Fine. 22. Cloudy. 23. Fine. 24. Fine : stormy. 25, 26. Fine. 27. 

 Cloudy. 28. Fine : rain p.m. 29. Cloudy : rain a.m. and p.m. 30. Cloudy. 



Sandwich Manse, Orkney. — April 1. Clear : fine : clear. 2. Cloudy : fine : clear : 

 fine. 3. Bright : fine : clear : fine. 4 — 7. Clear : fine. 8. Bright .- damp. 9. 

 Clear : fine : cloudy : fine. 10. Clear : fine : aurora. 11. Hazy : fine : clear : fine : 

 aurora. 12,13. Bright: fine: warm: fine. 14. Bright: fine: warm: fine: 

 aurora. 15 — 17. Bright: fine: warm: fine. 18. Cloudy: fine: clear: fine: 

 aurora. 19. Bright : fine : clear : fine. 20. Drops: fine: clear: fine: S. aurora. 



21. Clear : fine : clear : aurora. 22, 23. Bright : cloudy : aurora. 24. Clear : fine. 

 25. Clear : fine : aurora. 26. Cloudy : fine. 27. Bright : fine : clear : fine. 28. 

 Cloudy : fine : showers : fine. 29. Fog : damp. 30. Cloudy : clear : fine. 



This month has been unprecedented^ fine, dry and warm, with the barometer 

 high. 



Mean temperature of this month 47°"64 



Mean temperature of April for preceding twenty-five years ... 43 *28 



Average amount of rain in April for six years 2 inches. 



The most singular meteorological phaenomenon this month was the perpendi- 

 cular column of light which appeared above the sun at setting, extending about 

 15° in height, wider than the apparent diameter of the sun, following his course 

 northwards, and continuing one evening for 55 minutes. It appeared at sunset on 

 the 6th, 11th, 16th, 24th, 26th and 27th, and once or twice before I noted the 

 date, either this month or March, also before sunrise. 



