KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 51. N:o |l. 56 
BRrRocH asserted, in 1913, that Gersemia uvaeformis was identical with G. rubiformis. 
The shape of the spicules, and especially of those in the upper part of the anthocodia and 
in the branch bark, and the characteristic shape of the colony distinguish this species 
very clearly from G. rubiformis, as well as from G. clavata, so that I cannot accept BRoc's 
assertion as correct. I have not found any transitions between G. rubiformis and G. 
uvaeformis. 
Measurements of spicules: "The upper part of anthocodia, 0.2—0.1 mm.; the branch 
bark, 0.1—0.3 mm.; the trunk, 0.07—0.12 mm. KÖKENTHAL gives (1907) spicules of 
upper part of anthocodia 0.38 mm., May (1900) spicules of branch bark 0.2—0.25 mm. 
The canal system is like that of the preceding species. The indirect, endodermal 
canal system is very developed. In the upper parts of the branches there is often found 
a direct connection, which, however, disappears lower down, where the walls between 
the coelenterons become thicker and the number of the tubes reduced. 'The endodermal 
cell-strings attain great development and are found in the most delicate tissue, for in- 
stance in the mesenterial-filaments. (P1. III, fig. 28.) 
Habitat: 
Newfoundland, Lat. 47” 8 N., Long. 52” 28 W., 66 met., stone, sand (Ingegärd 
angitladan; 5/, I871); 3, sps. 
Davis Sound, Lat. 63” 41 N., Long. 52” 25' W., 63 met., shells (Ingegärd and Gla- 
dan, >/, 1871), 3 sps.; Lat. 65? 11' N., Long. 53” 33 W., 66 met., clay (Ingegärd and Gla- 
dan, "/, 1871), 6 sps. 
Baffin Bay, Lat. 67” 59' N., Long. 56” 33' W., 176 met., stone, mud (Ingegärd and 
Gladan, ?/, 1871), 1 sp.; Lat. 68" 14' N., Long. 54? 7 W., 236 met., sand mixed with 
clay? (Ingegärd and Gladan, ”/, 1871), 5 sps.; Lat. 72? 32 N., Long. 58 5r W., 209 
met., stone (Ingegärd and Gladan, ?/, 1871), 2 sps. 
Greenland, Disco, North Fiord, 290 met., loose gray clay (Ingegärd and Gladan, 
AST) Sp. 
Spitzbergen, Lat. 79” 58 N., Long. 9 30' E., N. W. from Danish Island, 435 met., 
gray clay, stones, + 1,5” C. (Spitzb. exp., ”/, 1898), 1 sp.; Ice Fiord, Cape Boheman, 
40—50 met. (Spitzb. exp., ?!'/, 1898), 3 sps.; Bell Sound, 54—72 met., stone, zoophytes 
(TORELL), 3 sps.; Parry Island, 45—54 met., stone, gravel (?/, 1868), 2 sps.; Waygat 
Island, 54 met., rocky bottom (Aug. 1861), many sps.; King Charles Land, Lat. 78” 50' 
N., Long. 29” 39' E., 60—70 met., fine black-gray clay (Spitzb. exp., "/; 1898), 4 sps.; 
Bremer Sound, 100—110 met., fine clay with large stones, traces of Biloculina (Spitzb. 
exp., "4 1898); 10”spst 
Beeren Island— Hope Island, Lat. 75” 49' N., Long. 24? 25' E., 80 met., rock bottom 
(Spitzb. exp., ”/, 1898), 7 sps. 
Further Distribution: 
Spitzbergen, 90 met. (May 1900). 
