Meteorological Observations. 351 



5. Macrochisma megatrema, a. Adams. M. testa ovato-ob- 

 longd, albidd, roseo radiatim pictd, costeUis rugosis striisque 

 concentricis sculptd, dorso subeleratd, lateribus planulatis ; 

 foramen ovato-lanceolatum, permagnum. Hub. ? 



6. Macrochisma cuspidata, a. Adams. M. testd ovato-ob- 

 longd, antice angustatd, prodvctd, aeiiminatd, postice elevatd, 

 rotundatd, inargine valde undulatd, fuscatd, annulis fuscis con- 

 centricis ornatd, lineis elevatis et concentricis cancellatd, circa 

 foramen pallida, extreruitate posticd valde elevatd ; foramen 

 magnum, cuspidatum, postice dilatattan. 



Hab. Cagajan, in iusulis Philippinis ; H. C. (Mus. Cuming.) 



7. Macrochisma producta, A. Adams. 31. testd angusto- 

 oblongd, dorso elevatd, convexd, albidd, fusco pallide variegatd, 

 lineis elevatis striisque concentricis obsolete decussatd, antice 

 angustd, productd, lateribus planulatis, extremitate posticd ro- 

 tundatd, elevatd ; margine valde sinuatd ; foramen perlongum, 

 triangulare, postice dilatatum. 



Hab. in littoribus Australiae. (Mus. Ciiming.) 



8. Macrochisma angustata, A. Adams. M. testd angustd, 

 oblongd, dorso elevatd, utrinque rotundatd, albidd, lineis fuscis 

 maculisque ntfofuscis pictd et tessellatd, costellis obtusis srib- 

 rugosis, lineisque depressis, concentricis, subdistantibus, sculptd, 

 extremitate posticd elevatd, margine sinuato ; foramen mag- 

 num, elongatvm, subtriangulare, postice dilatatum, excavatum. 

 Bab. I— From the Proc. of the Zool. Soc. July 23, 1850. 



meteorological OBSERVATIOXS for AUG. 1851. 

 Chisxoick. — August 1. Cloudy and warm : slight rain. 2 — 5. Very fine. 6. Fine : 

 densely clouded. 7. Overcast : fine : clear : lightning at night. 8. Very fine. 

 9. Overcast : cloudy. 10. Cloudy. 13. Sultry. 14. Fine : lightning at night. 

 15. Cloudy and fine. 16. Very fine. 17. Showery. 18. Cloudy and fine: clear. 

 19. Very fine : slight haze : clear. 20, 21. Very fine. 22. Very hot. 23. Over- 

 cast. 24. Heavy showers, with sunny intervals. 25. Very fine. 26. Slight rain. 



27. Fine : constant and very heavy rain at night. 28. Fine : densely clouded. 

 29. Clear and cold : heavy showers, with hail in afternoon: overcast. SO, 31. 

 Cloudy. 



Mean temperature of the month 62°"84 



ISIean temperature of Aug. 1 850 59 '38 



Mean temperature of Aug, for the last twenty-five years . 62 "21 



Average amount of rain in Aug 241 inches. 



Boston. — Aug. 1. Cloudy: rain p.m. 2 — 4. Fine. 5 — 7. Cloudy. 8. Fine. 



9 — 11. Cloudy. 12. Fine. 13. Cloudy: rain early a.m., and lightning p.m. 



14. Fine: rain, thunder and lightning p.m. 15. Fine. 16. Fine: rain p.m. 



17. Fine. 18. Cloudy. 19. Fine. 20. Cloudy. 21,22. Fine. 23. Cloudy : 

 rain a.m. 24. Cloudy : rain p.ji. 25. Fine. 26. Cloudy : rain p.m. 27. Cloudy. 



28. Fine: rain early A.M. 29. Cloudy : rain a.m. and'p.M. 30,31. Cloudy. 

 Sandtuick Manse, Orhiey. — Aug. 1. Bright : showers. 2. Cloudy. 3. Bright : 



clear. 4. Bright : very clear : fine. 5. Clear: fine: very clear : fine. 6. Clear: 

 fine : very clear : fine : aurora. 7. Clear : fine : haze. 8. Cloudy. 9, 10. Cloudy : 

 bright. 11. Cloudy: drops. 12, Drizzle : damp. 13. Rain : damp. 14. Rain : 

 drops: fine. 15. Drops: damp. 16. Clear: fine. 17. Cloudy: clear: fine. 



18. Clear: cloudy. 19. Rain : cloudy. 20. Hazy : fine, 21. Rain. 22. Damp : 

 cloudy. 23. Bright : cloudy : thunder. 24. Clear : cloudy. 25. Bright : clear. 

 26—28. Showers. 29. Showers : drizzle : showers. 30. Bright : clear : aurora. 

 31. Drizzle : clear : aurora. 



