Meteorological Observations. 351 



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

 longd, albidd, roseo radiatim pictd, costellis rugosis striisque 

 concentricis sculptd, dorso subelevatd, lateribus planulatis ; 

 foramen ovato-lanceolatum, permagnum. Hab. ? 



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

 longd, antice angustatd, productd, acuminatd, postice elevatd, 

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

 centricis ornatd, lineis elevatis et concentricis cancellatd, circa 

 foramen pallida, extremitate posticd valde elevatd ; foramen 

 magnum, cuspidatum, posticd dilatatum. 



Hab. Cagayan, in insulis Philippinis ; H. C. (Mus. Cuming.) 



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

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

 lineis elevatis striisque concentricis obsolete decussatd, antich 

 angustd, productd, lateribus planulatis, extremitate posticd ro- 

 tundatd, elevatd; margine valde sinuatd ; foramen perlongum, 

 triangulare, postice dilatatum. 



Hab. in littoribus Australia. (Mus. Cuming.) 



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

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

 maculisque rufo-fuscis pictd et tessellatd, costellis obtusis sub- 

 rugosis, lineisque depressis, concentricis, subdistantibus, sculptd, 

 extremitate posticd elevatd, margine sinuato ; foramen mag- 

 num, elongatum, subtriangulare, postice dilatatum, excavatum. 

 Hab. %—From the Proc. of the Zool. Soc. July 23, 1850. 



meteorological OBSERVATIONS FOR AUG. 1851. 

 Chiswick. — 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. 30, 31. 

 Cloudy. 



Mean temperature of the month 62°*84 



Mean 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 2*41 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.m. 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. 

 Sandwich Manse, Orkney. — 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. 



