424 Miscellaneous. 



Feb. 28. Nordmannia cordifolia. Mar. 11. Scillabifolia,ca3rulea(13th 



Mar. 1. Hyoscyamus Scopolia. of March). 



1. Primula nivalis. 11. Pulmonaria mollis. 



2. Doronicum caucasicum. 11. Vinca major. 

 2. Tussilago nivea. 12. Tussilago alba. 



4. Narcissus pumila. 12. Sisyrinchiumgrandiflorum. 



5. Anemone Pulsatilla. 13. Hyoscyamus Physaloides. 



7. Asarum Europaeum. 13. Cheiranthus Cheiri. 



8. Omphalodes verna. 14. Draba aizoides. 



9. Iberis sempervirens. 14. Aponogeton distachyon (in 

 11. Cardamine hirsuta. open-air pond). 



11. Erythronium Dens-Canis. 14. Symphytum caucasicum. 



11. Scilla bifolia, alba. 14. Ribes sanguineum. 



Mr. Evans stated that he had made similar observations on the 

 flowering of plants in the Experimental Garden. In a warm situa- 

 tion Sisyrinchium grandiforum andPrimula denticulata were in flower 

 on the 19th of February. Bellis perennis flowered on the 25th of 

 February, and the Apricot on the 1st of March. 



Specimens of dye-woods were sent for exhibition by Michael Con- 

 nal, Esq. 



Mr. Stark exhibited specimens of Leptothrix tinctoria and Chylo- 

 cladia reflexa from Mr. Ralfs ; also of Sphacelaria plumosa in fruc- 

 tification, S. scoparia from Arran, and S. Jilicina from the county 

 of Down, Ireland. 



MISCELLANEOUS. 



On the Pathology of the Silk-Worm (Bombyx Mori, L.). Examina- 

 tion of the Blood. By F. E. Guerin-Meneville. 

 The author has directed his attention to that most terrible malady 

 which attacks the silk-worm, and is known in the nurseries by the 

 name of Muscardine. It depends upon a microscopic plant belonging 

 to the group Botrytis, which developes itself in the worm whilst living, 

 and destroys it at the very period at which it spins the precious 

 cocoons which ought to repay all the care and expense bestowed 

 upon the animal. 



The blood of a healthy silk-worm examined as it leaves the body, 

 exhibits under the microscope, globules analogous to those of the 

 human blood ; but these globules are developed and reproduced from 

 each other during the entire course of the life of the animal, and pass 

 through the following phases, which may be observed in the same 

 drop of blood. At first there are minute globules exhibiting in their 

 centre simply a single opake point ; the globule when grown larger 

 presents a nucleus composed of several granules of equal size. At a 

 third period, these granules become disaggregated and tend towards 

 the circumference of the globule ; finally, they push outwards the 

 various points of its external envelope upon which they press ; hence 

 the circumference of the globule presents projections resembling buds 

 which soon open and give passage to the granules which have pro- 

 duced them ; these when once set free in the serum become surrounded 

 by a transparent membrane, and form new globules in the first stage 

 of development. These curious facts, which the author only admits 



