282 THE JOURNAL OF BOTANY 
laribus; antherozoideis singulis?; cellulis vegetativis evidenter 
leviter capitellatis ; a fili basali subhemispherica vel sub- 
spheerica, haud elon 
Crass. cell. veg. se masc. 7°5-9 pw ; altit. 2-4-plo major ; 
f 9°5-11 BL 2—4-plo ”? 
bi 23 ” 29 em. ; 2 
»  oogon, 29-88 w; ,, 29-83 p; 
3» | oospor, 25-29 uw; ,, 25-29 p; 
», cell. antherid. 75-9 p;> 
cell. fil. basal. 14-16 a meee | Bf 
Wi (. pecilosporum Nordst. et Hirn. From the former it 
is distristlahed by its dicecious macrandrous habit, by its globose 
oospores, and by its somewhat larger size; from the latter it differs 
in its globose oospores, and in the. capitellated vegetative cells. 
the dicecious nannandrous species of (dogonium, it approaches 
nearest 4 i. decipiens 
The antheridia sometimes possess aS many as sixteen pa 
The oa gtr of the filaments are somewhat peculiar. gues 
depressed subglobose in form, and the first formed cell of the ae: 
ment grows — a circular opening at the upper pole of the 
basal cell. a type of nee of the zoogonidia occurs 
in very few species of (i my and has been well described 
by Scherffel (* Binige Bastache | iiber (dog. mit ay age 
Rosenalie” Berichte Deutsch. Botan. Gesellsch. 1901, Bd. xix 
pp. 557-5638, t. xxxi.). 
A number ae — species of (dogonium were noticed from 
Barbados, Dominica, and er but they were not in a condition 
for satisfactory Wetton 
2. ULorurix SUBTILIS pen var. VARIABILIS arr ) Kirchn. 
T'rinidad.—Pools on the Pitch Lake, La Bre 
3. Hormospora scalariformis, sp. n. (Figs, 6-7.) H. cellu- 
lis anguste oblongo-ellipsoideis, subremotis, transverse dispositis in 
tubo mucoso hyalino ampliato; margine exteriori tegumenti mucosi 
subarenaceo ; chromatophoris singulis parietalibus, cum pyrenoide 
singulo et multis granulis eet Long. max. (transv.) cell. 
7-85 w»; long. min. cell. 2°3-2: 6 pe; diam. eaplmenit. mucos. 
13°5-17 p. 
Barbados.—Near Bridgetown. 
The cells of this alga are very minute, oblong- ellipsoid in form, 
and are disposed in a single series within a cylindrical gelatinous 
investment, the long axis of the cells being placed transversely to 
the length of the mucous envelope. Each cell is also surrounded 
by a differentiated part of this mucus. The exterior of the mucous 
erssitpe is more or less partially covered with minute grains 0 
sand. The chloroplast agrees well with that of other species of 
the genus, being a thin parietal plate containing a pyrenoid. It 
