139 



resembles this, richly provided with reproductive organs, only the 

 crust being more regular owing to the substratum, often with 

 smoother surface, and the colour is a somewhat darker pink, some- 

 times with a purplish tinge. The species probably includes two 

 or three forms, but the material at my disposal is rather scarce, 

 and I have not been able to draw any limit between them. 



The conceptacles of sporangia I nearly always found to be 

 flattened hemispherical, occasionally nearly disc-shaped, but strongly 

 prominent, now and then nearly superficial, about 500 — 700 \j- in 

 diameter, most often rather crowded and sometimes so densely that 

 the roofs become angular. The testraporic sporangia get up to 

 300 y. in length, ho w ever, rather varying both in length and breadth. 

 Cp. Kjellm. 1. c. 



The conceptacles of cystocarps I met with in the greatest 

 number on specimens fastened to stones, more seldom and in less 

 numbers on epiphytic ones, conical or depressed-conical, 500 — 600 

 p. in diameter at the base, now and then, however, even up to 

 800 p.. They are not acute, but at least often rather high and 

 somewhat constricted towards the summit. This upper portion 

 falls away earlier than the lower, or a part of the lower, and then 

 the conceptacles look very low. The carpospores are nearly rec- 

 tangular, with more or less rounded corners, or slightly narrower 

 towards the base, or, apparently more seldom, broadly cuneate, 

 in general 150 — 180 fi long and 60 — 80 ;j. broad. 



Together with the last named conceptacles there occur some 

 smaller, in shape nearly resembling the former, but only 250 — 300 fi 

 in diameter at the base. These I suppose to be the conceptacles 

 of antheridia, but I have not seen certain spermatia. 



At maturity the whole roof of the conceptacles of sporangia 

 often falls away, leaving a cup-shaped scar with more or less ele- 

 vated edges, which is gradually effaced by local formations of 

 tissue, and thereby the surface becomes more irregular. This seems 

 especially to be the case if the conceptacles are nearly superficial, 

 othervvise they appear to grow down even if the whole roof gets 

 quite dissolved. However, overgrown conceptacles often are scarce 

 even in older crusts. On the other hand also the cystocarpic con- 



