120 
usually monosporous; in some cases, however, the contents seemed to be divided 
into two or four parts (fig. 46 A), but conclusive observations were not arrived at. 
On Polysiphonia urceolata dredged near Hirshals I have found, growing in 
company with other interesting Algæ (Erythrocladia irregularis and subcontinua, Chan- 
transia emergens), a small Chantransia which I believed at first to be a different 
species, most of the rather few specimens consisting only of creeping filaments, 
bearing sporangia either directly or on unicellular stalks (fig. 48). Later however I 
found other specimens with numerous erect, partly sporangia-bearing filaments fully 
agreeing with the above described specimens growing on Chondrus, and I therefore 
have no doubt that they belong to the same species. The dimensions were the 
same; I found however that the sporangia borne directly on the basal layer were 
somewhat shorter, 8—9 » long, 6 broad, perhaps only because they were not fully 
ripe. The chromatophore showed the same ap- 
pearance as in the specimens from Hanstholm, 
but the pyrenoid appeared not to be central; 
as the material from both localities was only 
dried, the question must however be left open. 
B In some fairly juvenile plants I succeeded in 
finding that the first divisions of the germina- 
ting spore take place in a similar manner as 
in Ch. virgatula, three peripheral cells being cut 
off round an inner triangular cell (fig. 48 B). 
This species appears to be distinct from all 
hitherto described species especially by its mode 
Fig. 48. of growth and its slight thickness. Ch. chiloensis 
a Eee a a Reinsch (Contrib. ad Alg. et Fung. Vol. I 1877 p. 37 
bearing sporangia. B, fairly young plant seen Taf. XI fig. 1) which was found at St. Thomas, 
Be en West Indies, growing on Acanthophora Thierii, 
differs according to REINSCH by the greater length 
and thickness of the filaments, by the short creeping filaments consisting of shorter 
cells and by broader sporangia. 
Localities. Sk: Hanstholm, Roshage, on Chondrus crispus in 2 m. depth, YU", August; XO, 
Mellegrund off Hirshals, on Polysiphonia urceolata, 11,5 to 15 m., August. 
15. Chantransia reducta sp. nov. 
Thallus filiformis ramosus repens substrato affixus. Spora germinans in cel- 
lulas duas divisa est quarum utraque filum repens procreat. Cellule filorum 
repentium leviter tumide, c. 4. crassæ, longitudine diametro fere æquali vel sæpius 
duplo longiores, chromatophorum parietale, pyrenoide fere axili munitum, conti- 
nentes; utraque cellula demum superne sporangium aut filum brevissimum gerens. 
Fila erecta 1—3-cellularia simplicia, rarissime ramosa, 4,5—6 y lata, cellulis dia- 
metro fere æquilongis vel paullo longioribus, nonnunquam pilum hyalinum apicalem 
