324 PROTOCOCCE^. 



The cells of this species precisely resemble those of H. 

 Allmani in form and size, the only difference being that of 

 colour, and the absence of the mucous elongations. It ought, 

 assuredly, to be regarded as congeneric with H. Allmani. 

 In a specimen from the herbarium of Sir W. J. Hooker, the 

 granules were not, as in other specimens which I have exa- 

 mined, exactly cylindrical, but somewhat pointed at one 

 extremity. 



May 14. 1845. I have just detected mucous appendages 

 in this species similar to those of H. Allmani. 



3. ILEMATOCOCCUS CKYPTOPHILA Hass. 



Plate LXXX. Fig. 1. 

 Char. Granules blood-red, small, usually oval. 



Palmella ? cryptophila Carm., MS. cum icone. Hcema- 

 tococcus sanguineus, in part, Harv. in Manual, p. 181. 



Hob. On a stalactitic incrustation lining the vault of a 

 cavern in a quartz rock, Appin : Captain Carmichael. 



This forms wide patches, externally of a brick-red colour, 

 but within whitish, breaking up easily into the numerous 

 separate portions of which each mass is formed. The reason 

 of the red colour being confined to the external surface of 

 the crust results from the structure and mode of develope- 

 ment of the species of this genus. The colour resides alone 

 in the granules : these terminate the superior extremity of 

 the mucous prolongations, which are colourless, and arranged 

 almost entirely side by side. The granules or cells are several 

 times smaller than in H. Allmani. 



b. Mucous prolongations transversely corrugated or ringed. 

 Granules 1 2 in each cell, spherical. Vesicles numerous. 



4. HJEMATOCOCCUS INSIGNIS Hass. 



Plate LXXX. Figs. 6 a. 6 b. 

 Char. Granules very large, spherical, Hood-red. 

 Hal. England. 



