(100) 



to paper, but when old scarcely adhering. Colour, pale yellowish or 

 greenish olive when young, umber brown when old. Fructification : 

 minute roundish elliptical spores, collected in little groups or sori on 

 the surface of the frond, and mixed with short, articulated, club-shaped 

 filaments, simple or with few short ramuli. The dots or sori are at 

 first round, but they often become confluent, thus assuming an oblong 

 or irregular forai, and sometimes run together in patches. 



This fine species seems more generally distributed than the preceding, 

 and to find its northern limit at a much higher latitude. Although it 

 does not seem to be common in Scotland, it is occasionally met with on 

 om- shores. It was detected at Appin by Captain Carmichael {Phyc. 

 Brit). We have received specimens from Arran, and although one of our 

 rarer species, it is not scarce in one or two localities on the Forfarshire 

 coast. 



The base of the frond is generally suddenly inflated, but often, as in 

 the figure in Phyc. Brit., the base gradually tapers, sometimes nearly as 

 much as in A. echinatus ; and although the inflated apices are more con- 

 stant, yet they too are occasionally tapered to an obtuse point, but 

 rarely so much so as in A. echinatus, and in the same tuft fronds will 

 always be observed with the obtuse extremities characteristic of the 

 species. Sometimes the frond is inflated at the summit or blown up like a 

 bladder, but more frequently this part has become torn or abraded, and 

 has a ragged or uneven appearance, and the frond is frequently more 

 or less twisted and contorted or cm-ved round in the form of a hoop. 



ASPEROCOCCUS TURNERI. 



EXPLANATION OP DISSECTIONS. 



Fig. 1. — Surface of frond. 

 2. — Base of the same. 

 3. — Spores. 

 4. — Section of frond. All macrnified. 



