106 ANNALS OF SCOTTISH NATURAL HISTORY 



"Has laxer structure of nerve than usual." I have now had an 

 opportunity of re-examining the nerve in cross-section, and I am of 

 opinion that this moss deserves a varietal (if not a specific) place 

 amongst the Campylopi. 



CAMPYLOPUS HUNTI. Stems loosely aggregated, from one to 

 two inches in height, stoutish, sparingly pallido-tomentose ; leaves 

 erect, slightly secund, loosely set, elongating upwards until at apex 

 they form a somewhat cuspidate cluster, lanceolate acuminate, den- 

 ticulate at apex ; nerve | breadth of leaf near base, of 4 strata of 

 cells, those of the anterior row large and pellucid, 12 to 20 diameter, 

 behind this another pellucid row, 7 to 12 diameter, next a row of 

 cells very often pellucid, 5 to 9 diameter, on the back projecting 

 detached pellucid cells, 6 to 9 in height. The cells of the first three 

 rows are enlarged downwards, until near the base the nerve is of a 

 spongy texture, composed of large pellucid cells with very little con- 

 nective or intercellular tissue. The cells of the posterior projecting 

 row become shallower downwards, and nearly disappear just above 

 the base. There are auricular spaces at base composed of large 

 colourless cells, about 60 by 30 ; but these spaces do not bulge 

 beyond the margin, but resemble the corresponding spaces in some 

 Dicmna. The lower cells of the pagina are quadrate, 30 to 40 by 

 12 to 17, and diminish in size upwards, until near the apex of 

 pagina (which extends only one-third up the leaf) they are still 

 sharply quadrate or at times somewhat rhomboid, and 8 to 1 1 by 

 4 to 6. The marginal basal cells are narrow, but not so narrow as 

 usual. 



Mr. Hunt remarks : " On the ground with Bryum grarile. Between 

 C. fragilis and C. Schwarzii" I agree with him. The auricles, 

 which are distinct and composed of cells differing in size and 

 appearance from the rest of the areolation, remain, at times, on the 

 stem, unless care is taken to detach the leaves from the stems slowly 

 backwards. 



Lastly, I may be allowed to remark generally that the pellucid 

 bulging posterior cells on the nerve seen in many Campylopi are apt 

 to be flattened or even squashed if sections of the nerve are made 

 after the leaves have been tightly bound in cork for some time, or 

 they collapse in a few instances after the specimens have been re- 

 tained for years in the herbarium. 



I may take an early opportunity of reviewing the Euro- 

 pean species of the genus Canipylopits, more especially as I 

 am beginning to perceive that I must modify my views of 

 one or two of the species. 



