Meteorolugical Observations. 151 



The shell has the ])lug and ninch the external appearance of the 

 Subgenus Fododesmus, but differs from it and all the other Anomia- 

 dee iu the following particulars : 1 . That the line which indicates the 

 junction of the two edges of the sinus 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 geuus Ostrea ; 4. It differs greatly in the number 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- 

 like the third scar of the genus Anomia. I know only of a single 

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

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

 nia pernoides ; subquadrangular, reddish, subsquamose, obscurely 

 radiated, internally reddish brown. — Proe. Zool. Soc. June 24, 1851 . 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1853. 



Chiswick. — 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 showery 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. Cloudy: 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. 



Sandwich 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 a.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 a.m. and p.m. 13. Bright a.m. : clear, fine p.m. 

 14. Bright, fine a.m. : cloudy p.m. 15. Showers a.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. Damp 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. Raiu 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 temperature of this month 55 '21 



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



