Meteorological Observations. 399 



horny, simple, thin, oval opercuhira, with the apex shghtlj^ spiral, and 

 the nucleus subterminal. The order, which consists of the genera 

 Trvncatella, Skenea, Geonielaida, and possibly Acicula and Assinii- 

 nea, differs from the Cydostomidce in the position of the eyes and 

 the short depressed tentacles ; and would seem to be placed most 

 naturally between Aiiriculidcs and Cyclostomidoi. By means o( Ris- 

 soa and Jli/drobia it has also rclritions with Littorinidce ; Truncatella 

 resembling the former and Aiminiinea the latter genus. In habits 

 they are amphibious. — Proc. of Zool. Sac. Dec. 11, 1850. 



METEOROLOGICAL, OBSERVATIONS FOR SEPT. 1850. 



Chiswick. — September L Drizzly. 2 — 5. Very fine. 6. Clear and fine. 7. 

 Frosty • very fine. 8, Cloudy. 9. Overcast. 10. Overcast : clear, IL Foggy: 

 very fine. 12. Foggy : fine : clear. I;5. Slight fog : fine : clear. 14. Foggy: 

 fine : clear. 15. Slight fog : cloudy. 16. Overcast: cloudy. 17. Clear and 

 fine. 18. Fine : overcast. 19. Foggy: overcast : rain. 20. Cloudy: rain. 

 21. Boisterous : heavy rain at night. 22. Heavy rain. 23. Rain : lightning in 

 the evening. 24. Cloudy : very fine. 25. Dense fog: very fine. 26. Overcast; 

 constant heavy rain. 27. Fine : thunder and heavy rain in afternoon. 28. Clear: 

 fine : clear. 29. Fine : rain. 30. Rain : rather boisterous : overcast. 



JNlean temperature of the month 54°'23 



Mean temperature of Sept. 1849 57 '76 



Mean temperature of Sept. for the last twenty-four years . 57 "23 

 Average amount of rain in Sept 2'6I inches. 



Boston. — Sept. 1. Cloudy. 2. Fine. 3. Cloudy: rain p.m. 4 — 6. Fine, 

 7. Cloudy : rain p.m. 8 — 12. Cloudy. 13 — 15. Fine. 16, 17. Cloudy. 18. 

 Fine. 19. Cloudy. 20. Fine: rain p.m. 21. Cloudy: rain early a.m. 22. Fine. 

 23. Cloudy : rain P.M. 24. Cloudy. 25. Foggy. 26. Rain : rain early a.m. 

 27. Fine : rain early A.M. 28,29. Fine: rain p.m. 30. Cloudy: rain a.m. 



Apiilegarth Manse, Dumfries-shire. — Sept. 1. Fine harvest day. 2. Fair, but 

 cloudy : threatening p.m. 3. Very fine : frost rime in the morning. 4. Frost 

 rime a.m. : one sliglit shower. 5, 6. Fair and fine, 7. Fair and fine, though 

 chill. 8. Fair and fine: milder. 9. P'air and fine : smelling of froit. 10. Fair 

 and fine : cloudy. 11. Fair and fine: cloudy: very warm a.m. 12. Fair and 

 fine : heavy dew : white rime. 13. Fair and fine : fine harvest weather. 14. Still 

 fair and fine. 15. Dull a.m., but cleared, and was fine. 16. Fine, but colder. 

 17. Fine, but colder : mercury falling. 18. Fine, but colder: moon wading. 



19. Fair, but threatening change. 20. Rain a.m. : rain also p.m. 21. Heavy 

 showers all day. 22. Heavy showers a.m. : cleared, but moist. 23, Very fine, 

 after showers in the night. 24. Fine harvest day. 25. Fair, but cloudy : 

 cleared p.m. 26. Rain during night and morning : cleared. 27. Succession of 

 heavy showers: flood. 28. Heavy rain during night: ditto day. 29. Rain and 

 hail P.M. 30. Showers. 



Mean temperature of the month , 51°*65 



Mean temperature of Sept. 1S49 53 '5 



Mean temperature of Sept. for the last twenty-eight years... 53 '17 



Average rain in Sept. for twenty-three years 3'13inches. 



Sandwick Manse, Orkney. — Sept. 1. Drizzle : showers. 2. Rain. 3. Clear : 

 cloudy. 4. Showers : damp. 5. Showers. 6. Fine. 7. Fine: aurora. 8. Fine: 

 cloudy. 9. Fine: cloudy. 10. Cloudy: aurora. 11. Fine: fog. 12. Fine: 

 cloudy: clear : aurora. 13. Fire: cloudy. 14. Clear : aurora. 15. Hazy: 

 aurora. 16. Fine: hazy: fine. 17. Fine. 18. Fine: cloudy. 19. Cloudy. 



20. Cloudy: drops. 21. Cloudy : rain. 2J. Bright: rain. 23. Showers: cloudy. 

 2-1. Cloudy : clear. 2.5. Bright : clear. 26. Hazy: clear. 27. Brii^ht: clear. 

 28. Rain : showers : aurora. 29. Bright : showers : clear : aurora. 30. Showers : 

 aurora. 



