513 
possibility of keeping this species distinct from A. incurva Kjellm. on 
the strength of the differences in the structure of the chromatophore. 
190. A. grandis Kjellm.? 
This species is recorded with some hesitation by Simmons 
(1. c. p. 274). He had sent his material to Kjellman to be deter¬ 
mined, but since it was not in a suitable state of development, the 
determination is uncertain. 
Simmons likewise records Spongomorpha Sonderi Kiitz. with 
doubt. »Exemplare, die wahrsclieinlich dieser angehoren, wurden 
im Trangisvaagfjord gesannnelt«. Judging from a dried specimen I 
have had for examination it is doubtless like Acrosiphorxia albescens. 
SPONGOMORPHA Kiitz. 1 
191. S. lanosa (Roth) Kiitz. 
I have only had scanty material for examination, as the speci¬ 
mens collected were few in number, and were, moreover, sterile; 
hence I have preferred to retain Kiitzing’s older name for this 
species and have also adopted his definition of it, the more so as I 
have not been able with any certainty to identify it with any of 
Kjellman’s species; among the latter my specimens seem to come 
nearest to Spongomorpha (Acrosiphonia) bombycina Kjellm. (1. c. p. 96). 
The thicker branches varied from about 25 to 30 y. 
Seems to be very rare along the coasts of the Fmroes. Found only 
in shallow water epiphytic on Cladophora rupestris, Str.: Sundene be¬ 
tween Thorsvig and Kvalvig (!). 
The Conferva uncialis Lyngb. recorded by Rostrup (1. c. p. 87) 
from Thorshavn may probably be referred to this species. 
CLADOPHORA Kiitz. 
192. C. rupestris (L.) Kiitz. Kjellm., N. I., p. 377 (307); Conferva 
rupestris Lyngb., Hydrophyt., p. 156, tab. 54 B. 
Found both in the littoral zone, usually near low-water mark, 
and in the sublittoral, where the water is not very deep. It is 
met with on open coasts as well as in sheltered localities, and 
grows on stones and rocks, often covering these with a dark-green, 
dense growth. It often occurs growing below species of Fucus , etc. 
The specimens growing uppermost often develop less vigorously; 
one such poorly developed form has been called by Simmons 
1 Cfr. Wille i Botaniska Notiser 1899, p. 281. 
