FRESH-WATER ALG;E OF HAMPSHIRE. 83,5 



which he was very fond. Diatoms he knew well, and had made a 

 large collection, but his chief microscopic favourites were Eotifers 

 and Infusorians. He took a very special interest in investigating the 

 flora and fauna of his own district — the Vale of Alford. He was the 

 life and soul of its Field Club, of which he was Honorary President till 

 his death. He was in hearty sympathy with those engaged in 

 scientific pursuits, and to the utmost of his power aided and 

 encouraged them. Perhaps his strongest point was his power of 

 stimulating otbers. Both to him and his accomplished wife the 

 writer is greatly indebted for collections of Desmid material from 

 all parts of the country. For the last few years they had to pass 

 the winter in the South of England, partly in the neigbbourhood of 

 Newbury, and the collections made there have given rise to the 

 present paper. 



CEdogonium undnlatum Breb. E. blunt spines at each angle. 



BulbochcEte setigera Ag. E. Length and breadth, 14J jjl ; 



B. rectangularis Wittr. E. length of spine, 3| li. 



GonatozygonFuiJ/siiDeBsuj. W. S. secedens De Bary. E. 



G. Brebissonii De Bary. E. Hyalotheca disslliens Sm. E. M. 



Spharozosma excavatum Balfs. E. — (3. bidentula Nord. M. — 



S.granulatumJ&oy &I$isset. E. W. y. tridentula Nord. E. M. 



Zygospore cubical, smooth, Desmidium Swartzii Ealfs. E., 



with one or two short stout abundant. P. 



Docidium coronatum Breb. E. This species occurred in great 

 abundance in a gathering from Enbridge in February, 1888. D. 

 nodulosum Breb. was equally abundant ; but what is of special 

 interest is that every intermediate form between the two was seen, 

 from nodulosum proper, with the apex perfectly smooth, to coro- 

 natum, with the "corona" fully developed. Some examples had 

 granules barely visible ; others, forming a series, showed the 

 granules larger, till finally the evidently fully-developed crenated 

 apex of coronatum appeared. These two forms therefore appear to 

 be the extremes of one species, which may be arranged thus : — 

 I), coronatum Breb. The fully-developed form. — (3. nodulosum Breb. 

 with smooth apex. The var. /3. is by far the commonest form in 

 this country. 



D. Farquharsonii, n. sp. B. Medium-sized, about six times 

 longer than broad ; constriction slight : ring prominent, brown ; 

 base very slightly tumid, with one or two very slight undulations 

 near it ; frond gradually tapers to about half the breadth at the 

 slightly thickened truncate apex, which terminates with about 12 

 flattened elongated granules, giving it a slightly crenulated aspect ; 

 chlorophyll-bands about G, wavy, with a clear circular space close 

 to the apex, containing numerous moving granules; surface 

 punctate; enveloped in a narrow mucous sheath. Length 288- 

 384 jx; breadth at constriction, 40-42 //, ; do., basal swelling, 

 48-53 jj. ; do., at apex, 22^-27 p. This very distinct species, which 

 I have a mournful pleasure in naming after my deceased friend Mr. 

 Farquharson, of Haughton, has been familiar to me for several 

 years. It is very rare, and is more frequently found among mosses 

 on wet rocks than in pools. 



