Meteorological Observations. 407 



ON THE GENUS VENILIA. 



To Richard Taylor, Esq. 



Newcastle, 12th April, 1844. 

 Dear Sir, — Having learnt from our friend Professor E. Forbes 

 that the name of Venilia, given to a new genus of Nudibranchiata 

 described by Mr. Hancock and myself in the ' Annals of Natural 

 History' for March last, has been previously used for a genus of 

 bivalve shells in Morton's 'Synopsis of the Chalk Fossils of the 

 United States,' we propose changing the name of our genus to Proc- 

 tonotus, and shall feel obliged by your announcing the alteration in 

 your next number. 



I am, dear Sir, yours very truly, 



Joshua Alder. 



METEOROLOGICAL. OBSERVATIONS FOR MARCH 1844. 

 Chiswick. — March 1. Cloudy and fine : rain at night. 2. Overcast: squally, 

 with heavy showers. 3. Cloudy and windy : clear and fine. 4. Constant heavy 

 rain throughout. 5. Cloudy : clear, with sharp frost at night. 6. Clear and 

 frosty : overcast : slight frost, 7. Cloudy and cold. 8. Very fine. 9. Cloudy 

 and mild. 10. Heavy rain. 11. Boibterouf. 12. Very clear : stormy showers. 

 13. Clear : cloudy. 14. Heavy rain. 15. Rain: fine. 16. Slight haze : fine. 



17. Overcast: boisterous. 18*. Clear and cold. 19. Cloudy. 20. Kain. 21. 

 Clear and fine. 22. Cloudy : rain at night. 23. Fine. 24. Cloudy : boisterous. 

 25. Overcast. 26. Very fine. 27. Overcast : hazy. 28. Very fine. 29. Dense 

 fog. 30. Dry haze. 31. Slight haze: clear and fine : foggy at night. — Mean 

 temperature of the month 0°-l below the average. 



Boston. — March 1, 2. Fine: rain early a.m. 3. Fine. 4. Fine: rain p.m. 

 5. Cloudy. 6. Fine: rain and snow p.m. 7. Cloudy. 8. Fine: rain p.m. 



9. Cloudy. 10. Rain. 1 1. Windy : stormy day : rain p.m. 12. Windy : stormy 

 day: rain and snow p.m. 1.3. Fine. 14, 15. Cloudy: rain a.m. 16, 17. Cloudy, 



18. Fine. 19. Cloudy. 20. Rain. 21. Fine. 22. Cloudy. 23. Cloudy: 

 rain early a.m. 24. Rain. 25. Cloudy: rain p.m. 26,27. Cloudy. 28,29. 

 Fine. 30. Foggy. 31. Cloudy. 



Sandiviek Manse, Orkney. — March I. Thaw: cloudy. 2. Rain: clear frost. 

 3. Cloudy : clear frost. 4. Snow-showers. 5. Snow : drift-showers. 6. Snow- 

 showers : cloudy. 7. Bright : cloudy. 8. Rain : damp. 9. Rain : showers. 



10. Bright : clear. II. Showers: snow-showers. 12, 13. Snow-showers. 14. 

 Bright: damp. 15. Bright : clear frost. 16,17. Bright : cloudy. 18. Bright: 

 damp. 19. Showers : rain. 20. Bright: cloudy. 21. Cloudy : rain. 22. Showers: 

 clear. 23. Clear. 24. Bright : clear. 25. Drops : clear. 26. Clear: cloudy. 

 27. Bright : clear : aurora. 28. Clear : cloudy. 29. Clear: aurora. SO. Fine. 

 31. Mist : aurora. 



Applegarlk Mouse, Dumfries-shire. — March 1. Heavy showers p.m. 2. Very 

 slight rain. 3. Heavy rain. 4. Fair. 5. Slight shower : snow. 6. Frost a.m. : 

 fine. 7. F"rost. 8. Frost: snow: rain p.m. 9. Sharp showers: rain. 10. Clear 

 a.m. : rain P.M. 11. Showers of sleet. 12. Frost : snow. 13. F"rost:fine. 14. 

 Kain P.M. 15. Sleet. 16. Frost : fair. 17. Frost : fine. 18. Frost : rain p.m. 



19. Showery: sleet. 20. Frost: fine. 21. Rain: hail. 22. Fine. 23. Rain 

 and hail. 24. Heavy rain. 25, 26. Fine. 27. Very fine: rain p.m. 28. Fine : 

 frost. 29. Fine spring day. SO. Fine- frost. 31. Fine. 



Mean temperature of the month 3S°-8 



Mean temperature of March 1843 40 -7 



Mean temperature of twenty years 38 -9 



Mean temperature of spring-water ^, 45 '0 



