of Bed Snow. ^ 



usually introduced into it, as tlie Frotococcus nebulosus^ Kutz. 

 1. c. and fig. 10 of our plate ; but I have no doubt that more 

 powerful magnifiers will enable us to perceive internal sporules. 



Hcematococciis, Agardh, Ic. Alg. Eur. No. et tab. 22 et 24. 

 Globuli liberi sporidia sporulis repleta includentes. Hcema- 

 tococcus sanguineus, Ag. 1. c. No. et tab. 24. Microcyrtis 

 sanguinea, Kutz. in Linn. 1833, p. 372. Protococcus nivalis, 

 Corda in Strum D. Fl. et Kutz. 



The Scottish plant figured and described by Greville, is 

 also placed in this genus by Agardh, under the name of Hce- 

 matococcus Greinllii, on account of the large granules which 

 it contains. These granules, judging from the Hcematococcus 

 Noltii already mentioned, which I have examined in the fresh 

 state, should be sporidia, that is to say, not sporules, but thecce, 

 in which the true sporules are contained, as in the genus 

 Hcematococcus, such as I have defined it. But the presence 

 of a gelatinous substratum, as to the accuracy of which (in 

 virtue of the confidence I place in the observ^ations of my 

 friend Dr Greville) I am inclined not to entertain a doubt, 

 must naturally exclude it from this genus, and place it in a 

 higher one of the system. Approximating closely to the Pal- 

 niella, it will be distinguished from this genus principally be- 

 cause the globules are external, and not inclosed in the gela- 

 tine. For this genus, then, 1 shall propose the name of — 



Gloiococcus, Shuttl. Globuli massa? gelatinosae affixi, ses- 

 siles, sporidia sporulis repleta includentes. Gloiococcus Grer 

 villii, Shuttl. Protococcus nivalis, Grev. Scot. Crypt, flor. No. 

 et tab. 231. excl. syn. Hcemalococcus Grevillii, Ag. Icon. Alg. 

 Eur. No. et tab. 23. Microcyrtis Grevillii, Kutz. Linn. 1833, 

 p. 372. 



I do not know if the 9th figure of Bauer's plate belongs to 

 this last description, but it is the more probable, in that Har- 

 vey regards the plant of the polar regions as identical with 

 the Scottish, and I am inclined to believe that the Palmella 

 nivalis of Hooker (1. c.) is probably to be referred to this 

 group. 



Before concluding, I must remind my readers that nothing 

 is so uncertain as observations ntade on microscopic organisms 

 which have been dried for the herbarium, or which are dead. 

 I hope, therefore, at some futiu-e period, to be able to c<Mn- 



