The variability of Chondrus crispus 
is well known, but it is impossible to 
draw any distinct limits between the 
numerous forms that may be met with. 
The most frequent and characteristic forms 
in the Danish waters are here recorded. 
A. Forms occurring near low- 
water mark, down to 2 or 3 metres’ 
depth. The uppermost specimens growing 
on stony reefs or moles left dry at low- 
water. Frond proportionally broad. 
F. typica. The most common form 
near low-water mark. Frond regularly 
dichotomously divided, sometimes with 
proliferations, up to 14 (18) cm long, 
6—10 mm broad, deep brown-red with 
a blue lustre. (LyNGBYE Tent. Tab. V A, 
Lamourovx, figs. 2—5, 8). The best devel- 
oped specimens were found at Hirtshals, 
Skagerak, where the fronds are usually 
regularly flabellate and broad without 
proliferations (figs. 464, 465). 
505 
Fig. 467. 
Chondrus crispus. Germination, A—D, germinating carpo- 
spores, 6 days old (*1/,—°/; 1928). E, germling from carpo- 
spore /; / 1914. F, G, germlings from tetraspores, Hirts- 
hals °/,—*/, 1914. 625 : 1 
F. abbreviata K3ELLMAN. KYLiN 1907. Only different from the foregoing by 
smaller dimensions. Frond up to 9 (13) cm long, up to 4 (6) mm broad. Same 
Fig. 468. 
Chondrus crispus f. densa. Shal- 
low water. Frederikshavn, July. 
Photo, nat. size. 
occurrence as the foregoing, in particular in the inner 
waters, on moles and stony reefs. 
F. densa. The frond short, broad, much branched, 
often taking a nearly globular form. The ramification 
may be apical (fig. 468) or, more frequently, chiefly 
marginal; in the latter case the frond is very broad and 
bears a very great number of longer or shorter, branched 
or unbranched marginal shoots. The number of branches 
and. shoots is so great that the tips of the shoots point 
in all directions in the globular forms (fig. 468). This 
form grows on stones in shallow water protected 
against the waves, for instance at Frederikshavn at the 
north-side of the harbour. A less dense form with num- 
erous proliferations is depicted in Flora Danica under 
the name of Ch. crispus var. ciliatus Suhr. It seems to be 
common at the isle of FönHr at the west coast of Slesvig, and has also been col- 
lected at Blaavandshuk. (Specimens with numerous narrow branches or 
proli- 
ferations at the upper margin of a short broad thallus may be named f. siellata 
D.K. D. Vidensk. Selsk. Skr.,7. Række, naturvidensk. ogmathem. Afd.,VII, 4. bo 
