Meteorological Observations. 151 



The shell has the plug and much the external appearance of the 

 subgenus Pododesmus, but differs from it and all the other Afwtnia- 

 diB in the following particulars : 1 . That the line which indicates the 

 j miction of the two edges of the smus which forms the perforation, 

 instead of being placed on the side of the ridge which supports the 

 cartilage, is placed at a considerable distance from it; 2. The sides 

 of the sinus are firmly soldered together, leaving only a circular hole ; 

 3. The support of the cartilage, instead of being merely a ridge or 

 process, here forms a large elongated subtriangular talus, hke that 

 found in the genus Ostrea ; 4. It differs greatly in the nurSber and 

 form of the muscular scars ; the two large ones in the free valves are 

 placed as in the genus Placunanomia, and there is a third anterior 

 one in each valve not found in any genus of the family, and very un- 

 hke the third scar of the genus Anemia. I know only of a single 

 specimen of the genus, which is in the collection of Mr. Cuming, 

 who believes that it came from CaUfomia. It may be called Tedi- 

 nia pernoides ; subquadrangidar, reddish, subsquamose, obscurely' 

 radiated, internally reddish brown. — Proc. Zool. Sac. Jime 24, 18.51. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1853. 



Chigwick. — June 1. Overcast: slight rain. 2. Cold haze: overcast: heavy 

 clouds. 3. Fine : clear. 4. Slightly overcast : cloudy and fine : clear. 5, 6. Very 

 fine. 7. Hazy : very fine. 8. Very fine : overcast. 9. Cloudy and mild. 10. Fine. 

 11. Slight haze : fine. 12. Overcast: rain. 13. Constant rain. 14. Cloudy. 



15. Very fine : heavy clouds : overcast. 16. Very fine: clear. 17. Cloudy and 

 fine. 18. Fine. 19. Rain. 20. Very fine : cloudy and showerj- at night. 

 21. Very fine : rain : clear. 22. Cloudy: slight rain. 23 Fine: clear at night. 

 24. Very fine : clear. 25. Rain : cloudy : rain. 26. Overcast : rain at night. 

 27. Densely overcast : slight rain. 28. Overcast. 29. Cloudy and fine. 30. 

 Showery. 



Mean temperature of the month 59°-16 



Mean temperature of June 1852 58*01 



Mean temperature of June for the last twenty-seven years . 60 "56 

 Average amount of rain in June 1*77 inch. 



Boston. — June 1 — 5. Cloudy. 6. Fine: rain p.m. 7,8. Fine. 9. Cloudy. 

 10 — 13. Fine. 14. Cloudv : rain, with thunder and lightning p.m. 15. Fine. 



16. Cloudy. 17. Fine. 18. Cloudy. 19. Rain: rain a.m. and p.m. 20. Fine: 

 rain p.m. 21. Cloudy : rain p.m. 22. Cloudy : rain a.m. and p.m. 23. Cloudy. 

 24. Fine. 25. Cloudy : rain a.m. 26, 27. Cloudy : rain a.m. and p.m. 28. Cloudy : 

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



Sandwick Manse, Orkney. — June 1. Fog a.m.: damp p.m. 2, 3. Drops a.m. : 

 cloudy p.m. 4. Cloudy a.m. and p.m. 5. Clear a.m. : cloudy p.m. 6. Cloudy 

 A.M. : showers, fine p.m. 7. Clear, fine a.m. : clear p.m. 8. Clear .\.m. : hazy p.m. 

 9. Drizzle a.m : showers, fog p.m. 10. Fog a.m. and p.m. 11. Fog a.m. : 

 showers, hazy p.m. 12. Hazy .\.m. and p.m. 13. Bright a.m. : clear, fine p.m. 

 14. Bright, fine am. : cloudy p.m. 15. Showers .\.m. : cloudy p.m. 16. Cloudy 

 A.M. : cloudy, fine p.m. 17. Cloudy a.m. : rain p.m. 18. Rain a.m. : cloudy p.m. 

 19. Bright a.m.: rain p.m. 20. Damp a.m.: clear, fine p.m. 21. Clear, fine 

 A M. and P.M. 22. Clear, fine a.m. : fog p.m. 23. Danip a.m. : clear p.m. 24. 

 Showers a.m. and p.m. 25. Showers a.m. : clear p.m. 26. Bright a.m. : clear p.m. 

 27. Rain a.m. and p M. 28. Bright a.m. : cloudy p.m. 29. Rain a.m. : showers 

 P.M. 30. Cloudy A.M. and p.m. 



Mean temperature of June for twenty -six previous years 52' 69 



Mean temperature of June 1852 55*33 



Mean temperaluie of this month 55 *21 



Average quantity of rain in June for seven previous years ... 2*46 inches. 



