102 L. KoLDERUP Rosenvinge. 



Fam. Squamariaceæ. 

 Criioria Fries. 



5. Cruoria arctica Schmitz. 



к. Rosenvinge (1893) p. 784, (1898 I) p. 15. 



It foi-ms crusts up to 4 cm. in diameter on barnacle-shells and 

 on Lithothamnion lœve; it seems to be always attached to a calca- 

 reous substratum. The specimens of the collection fully agree with 

 the original ones from West Greenland and are, like those, provided 

 with glandular cells. In a thick crust ripe sporangia (56/^ long^ 

 23 /i broad) were found in the upper part w^hile abortive sporangia 

 were visible at a lower level. This species is always infested by 

 Chlorochytriiim Schmitzii. — Found in various depths e. g. ca. 38 

 meters. 



Loc. Along Koldewey Island; otfBaadskæret and along Vestre Havnenæs. 



Cruoria firma Kjellman (1906) p. 14, is hardly specifically distinct from C. arctica. 

 According to Kjellman it differs from this species by having the basal laj'er consisting 

 of at least two layers. This statement, which is put forward however by the Swe- 

 dish author with some reservation, I suppose to be founded on imperfect prepara- 

 tion ; sections of C. arctica which are not very thin or exactly vertical lead easily to 

 the belief that there is more than one basal layer of cells. The sporangia appear to 

 offer no difference; they were onW comparativel}' narrow in Kjellmans specimens. 

 And the erect filaments seem to have essentially the same structui'e as in Cr. arctica. 



Petrocelis J. Ag. 



6. P. polygyna (Kjellm.) Schmitz. 



к. Rosenvinge (1898 I) p. 16. 



Hæmescharia polygyna Kjellman 1883) p. 182. 



Some few crusts of this species, partly sterile, partly with car- 

 pogonia have been found growing on stones. 



Loc. Along Vestre Havnenæs, ca. 38 meters, and another locality. 



Cruoriopsis Du four. 



7. C. hyperborea sp. n. 



Crusta intense sangvinea, 80 — 100« crassa. Stratum basale uni- 

 stratosum, e fills radiantibus compositum, cellulis 4*5 — 55« crassis, 

 8 — 105// altis, crassitudine vulgo 2— 3-plo longioribus. Fila erecta 

 5 — 8-cellularia, cylindrica vel sursum paulo incrassata, 7'5 — 10 /^ 

 crassa, cellulis diametro aequilongis vel ad duplo longioribus, chro- 

 matophorum unicum continentibus. Sporangia in fills erectis termi- 

 nalia vel in parte superiori eorum lateralia, sessilia vel rarius stipi- 

 tata, obovata vel breviter oblonga, 15 — 23// longa, 11 — 13« lata. 



One crust only of this new species has been found growing on 

 a stone. It has a deep blood-red colour, by which it differs from 



