margin here and there shallowly crenate. The colour is yellowish 

 brown, probably muen faded. 



I have not examined the structure and, there fore, I am not 

 quite sure whether the species belongs to the subgenus Eulitlio- 

 thamnion or to Lithopliyllum, quite likely, however, the former, 

 and of this the section Evanidæ. 



The conceptacles of sporangia are rather crowded over the 

 whole frond without any order, here and there even close to the 

 margin. They are superficial, never growing down in to the frond, 

 disc-shaped but little prominent and 300—400 fi in diameter. The 

 roof is intersected with 70—90 muciferous canals. At maturity 

 the whole roof falls away leaving a shallow hole with not or very 

 slightly elevated edges. In two conceptacles examined I found 

 mature or nearly mature . sporangia, four-parted and 120 — 130 {i 

 long, by 40 — 60 \). broad. 



Relation to otJwr species. This plant appears to be most 

 nearly connected with L. Stromfeltii Fosl. Lithoth. p. 145 (173). 

 It differs especially by its more uneven and not concentric zonated 

 surface and disc-shaped conceptacles. On the other hand it in 

 some respects shows greater affinity to L. scabriusculum Fosl. 

 Lithoth. p. 142 (170). 



Occurrence. The straits of Magellan, according to Mr. P. 

 Hariot. 



