Berggren. — On Hsematocoecus sanguineus. 369 



under my notice while it was passing through the press. The following 

 notes — with the analysis made some years since — will be found useful. The 

 plant has been named by Dr. Nylander (in a letter) Lecidea subglobosa. 



Dr. Stirton's notes follow pretty closely parts of Nylander's description of 

 the genus Gomphillus, Nyl. There is, however, an essential difference in the 

 structure of the thallus from that of the Gomphillus, which is overlooked by 

 Dr. Stirton, but which is strongly in support of his view that the plant should 

 be classified under the genus Stereocaulon. In Buchanan's lichen the thallus 

 is made up of gonimia, as in Stereocaulon, instead of gonidia as in Gomphillus. 

 Nylander's description of the genus Gomphillus would apply if "gonimia" was 

 substituted for "gonidia," thus: "Thallus tenuissimus, e gonimiis [gonidiis] 

 mediocribus sphericis elementisque filamentoso-irregularibus gelatinose con<*lu- 

 tenatis constans." The paraphyses are indistinct only from their exquisite 

 fineness and compactness ; not, I think, from the u tenacious stiff gelatine 

 which pervades the hymenium." 



The filaments which bind the gonimia together are few and scattered. 

 The spores are 0*160 millim. long, and 0-003 millim. broad. 



Plate XXV. — Stereocaulon buclmnani. Fig. 1, Section of apothecium 

 with portion of thallus. 2, Gonimia. 3, Gonimia, with filaments. 4, Spores. 



Art. LV. — On the Occurrence of Hasmatococcus sanguineus on the Wool of 

 a dead Sheep. By Swen Berggren, Ph. D., Lund University. Com- 

 municated by Julius Haast, Ph. D., F.R.S. 



Plate XXIY. 



[Read before the Philosophical Institute of Canterbury, 2nd April, 1874] 



That group amongst the Algse, which was formerly included under the 



contains 



suffuse with a characteristic 



which they grow. 



To this section of plants belongs the so-called "red snow," which consists 

 of simple roundish microscopic red cells, by which the ice and snow of alpine 

 and polar regions are coloured red; another species sometimes grows in 

 swamps and canals imparting to the water a similar hue ; while to another 



in certain portions of the ocean, the Red Sea owes its name. 



There are also species which form a red covering upon mosses or rocks • 



instance 



and bread 



rise 



origin 



milar Algse appear also occasionally upon animal bodies. Thus I found 



Yl 



