50 ELACHISTEA. 



2. ^.Jiaccida, Dilhv. ; tufts pencilled; filaments elongate, 

 flaccid, membranaceous, much attenuated to the base ; the 

 lower articulations half as long as broad, upper of equal 

 length and breadth ; tubercle hemispherical. Conferva flac- 

 cida, Dillw. Couf. t. G. Harv. I. c. p. 355; Wyait, Alg. 

 Banm. No. 292 ; Hnrv. Phyc. Brit. t. cclx. 



Parasitical on Cystoseira fibrosa, common. Annual. Summer. — Fila- 

 ments half an inch long, dull olive-brown; tubercle similar to that of £". 

 fucicola. 



3. E. curta, Dillw. ; filaments minute, rising from a tuber- 

 cle, rather rigid, pencilled ; articulations about as long as 

 broad. Dilliv. Conf. t. 76 ; Harv. I. c. p. 355. 



On Fuci. — Filaments ] — 3 lines long. A very little-known plant, not 

 found by any recent collector. 



4. E. pidvinata, Kiitz. ; tufts very minute, globose ; fila- 

 ments fusiform, much attenuated towards both ends, the basal 

 articulations 3 — 4 times, the middle once and a half, the 

 apical about as long as broad ; spores linear-obovate, sub- 

 sessile at the base of the filaments. E. attemiata, Harv. 

 Phyc. Brit. t. xxviii. A. 



Parasitical on Cystoseira ericoides. Annual. Summer and autumn. 

 South of England and West of Ireland. — Tufts about a line in diameter, 

 globose, very dense, composed of innumerable minute filaments. A beau- 

 tiful microscopic object. This is the Myriactis puhnnata of Kiitzing, a 

 fact of which I was ignorant when I published the figure in Phyc. Brit. 

 Kiitzing's specimens came from the Mediterranean. 



5. E. stelhtlata, Griff. ; tufts very minute, starry ; fila- 

 ments tapering to the base, short, clavate, surrounded by 

 paranemata, and rising from a tubercle ; articulations twice 

 as long as broad. Harv. Phyc. Brit. t. cclxi. Conf. stellu- 

 lata, Griff, in Harv. Man. Ed. 1, p. 132. 



Parasitical on the fronds of Dictyota dichotoma. Torquay, Mrs. Grif- 

 fiths. — Tufts half a line in diameter, resembling minute stars, or Echini. 

 Filaments rising from a distinct tubercle, composed of large ellipsoidal 

 cells, disposed in forking series or strings. Paranemata inserted with the 

 filaments, and about one-third their length. I have not seen spores. 



6. E. scutulata, Sm. ; filaments short, rising from an ob- 

 long, convex, shield-like tubercle, composed of densely- 

 packed branching fibres ; articulations about as long as broad. 

 Conf. scutulata, Sm. E. Bat. t. 2311; Harv. I. c. p. 355; 

 Wyatt, Alg. Danm. No. 223. 



Parasitical on the thongs ot Himanihaiia lorca. Annual. Summer. — 

 Tubercles resembling long warts, half an inch to an inch or more in 

 length. 



