ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
397 
a new genus Oonimophyllum, with the following diagnosis : — Thallus 
minutissimus, in Nitophyllo lacerato parasiticus, quasi duabus partibus 
compositus, inferiore parte (vegetativa) filis ramosis, monosiphoniis, 
irregularibus inter cellulas Nitophylli repentibus, et una cum cellnlis 
distortis plant® gestatricis pulviuar cellulosum efficientibus, constituta ; 
parte altera (in qua fructus evoluti) libera, plana, oblonga, subrotundata 
aut plus minusve lobata, cellulis angulatis areolata avenia ; fructus ut in 
Nitophyllo, sed soris totam paginam laminarum occupantibus. The new 
alga belongs to the same family, Delesseriace®, and even to the same 
tribe, Nitophylle®, as the one on which it is endophytic. 
(Edocladium, a new Genus of (Edogoniaceae. * — Under the name 
CEdocladhm protonema Dr. E. Stahl describes an alga representing a 
new type of Gtklogoniace® found in wet places in a pine forest near 
Strassburg. The thallus consists of an aerial much-branched chloro- 
phyllous and an underground colourless and slightly branched portion 
or rhizome. The cells of the green portion vary greatly in size, and the 
growth of the filaments is almost entirely apical. They display the 
formation of caps composed of cellulose-rings, characteristic of the 
(Edogoniace®. Persistent shoots containing a reddish-yellow endochrome 
are put out from the underground, less often from the aerial portions. 
The zoospores differ in no important respect from those of the other 
genera of the order ; but, on germination, they do not form the attach- 
ment-disk characteristic of CEdogonium ; they become attached by their 
green end, and the colourless end becomes the apex of the young plant, 
and it is here that the formation of rings takes place. The species is 
monoecious ; no dwarf-males were observed ; fertilization is effected by 
small antherozoids. (Edocladium differs from CEdogonium in its branched 
thallus ; from Bulbochaete in its exclusively apical growth. 
Ectocarpus and its Afnnities.f — M. E. Bornet describes in detail 
the following species of seaweeds from the Mediterranean : — Ectocarpus 
secundus, E. pusillus, E globifer, E. crinitus, Haplospora Vidovichii, and 
Tilopteris Mertensii. He points out that the statement that in some 
species of Ectocarpus the plurilocular sporanges are gametanges, while 
the unilocular are zoosporanges, rests at present only on three observa- 
tions made on two species, and that the observers are not in accord as to 
the exact nature of the phenomena. 
In E. secundus the antherid appears to be the homologue of the uni- 
locular sporange, which has not been observed in this species. The 
distribution of the antherids is very irregular. Two species have been 
described under the name of E. pusillus. The true -plant is that of 
Griffiths and of Harvey. The species described under this name by 
Kiitzing, Goebel, Falkenberg, Berthold, and Hauck, is identical with 
E. globifer Ktz. and 12. insignis Crouan and Holmes. It i6 in this species 
that the conjugation of zoospores (gametes) has so often been described 
and figured. 
The species variously named Ectocarpus Vidovichii Menegh., E. 
geminatus Menegh., E. Meneghinii Duf., and E. crinitus Hauck, is in 
* Jalirb. f. Wiss. But. (Pringsheim), xxiii. (1891) pp. 339-48 (2 pis.). 
t Bull. Soc. Bot. France, xxxviii. (1891) pp. 353-73 (3 pis.). Cf. this Journal, 
1889, p. 675. 
