184 



the signification of which is unlvnown (fig. 106 D, E). An incompletely developed 

 cystocarp is shown in fig. 106 F, it consists of a very small number of upwardly 

 directed filaments, ^Yhich have been somewhat displaced by pressure; the auxiliary 

 cell has produced a lateral outgrowth, but is otherwise not swollen. Fig. 106 G 

 shows a ripe cystocarp; the auxiliary cell, or better, the fusion cell, is here seen 

 as a large cell connected by pits with the neighbouring cells of the vertical filament. 

 All the cells of the cystocarp seem to produce a very large carpospore. The ripe 

 cystocarp consists of a spindle-shaped heap of large cells, few in number, reaching 

 downwards considerably beyond the insertion of the auxiliary cell; it has earlier 

 been shortly described and figured by Batters (1. c). 



The species occurs from low-water mark down to 30 meters depth. In some 

 places in the eastern Kattegat it occurs abundantly, covering the stones with ex- 

 tensive crusts, forming an association. The sporangia arise in autumn; they are 

 found ripe in winter and spring, emptied in spring and summer. Carpogonia were 

 met with at all seasons, often abortive however; cystocarps have only been met 

 with once in July. 



Localities. Sk : Off Lanstrup (ZK-), on I^aminaria hyperborea. — Kii: Herthas Flak (!, Bergesen); 

 TX, at Hirsliolmene ; Krageskovs Rev; Busserev at FrederiUsluivn ; harbour of Frederikshavn ; VU, east 

 of Nordre Ronner, 15 m; TO, TP, Tonneberg Banke, 16—18 m ; FF, TR, Trindelen, — Ke: IH, IT and 

 VZ, Groves Flak, 24,5 m; IQ, Zli', Fladen ; 11, IK, Lille Middelgrund; Store Middelgnind (Bargesen), 30 m; 

 lA, Store Middelgrund, 16 m ; 00, Seborghoved Grund. — Km: XC, NW of Anholt, 11 m, on the base 

 of Halidrys; D, north of Isefjord, on Fucus serratus, 11 m. — Sa: BF, off Sletterhage, 14 m; PH, Lind- 

 holms Dyb, 20,5 m; Northside of Refsnses (C. H. Ostenfeld), 19 m; DK, Bolsaxen, 14 m. — Lb: CC, South 

 side of Hornenfes, on Mytilus, 7,5 m. — Sb : NN, Southwest of Sproga, 19 m. — Sll : bM, South of Hveen. 



Cruoriopsis Dufour. 



Dufour, Elenco delle Alghe della Liguria, Genova 1864, p. 35 (non vidi), Schmitz and Hauptfleisch in 

 Engler u. Prantl. l,j p. 535. 



1. Cruoriopsis dauica sp. nov. 



Crusla sanguinea, diametro c. 2 — 'A mm, ad 74 // crassa. Stratum basale uni- 

 stratosum, substralo arete adnatum, e filis radiantibus compositum, cellulis 4 — 9 /j. 

 plerumque c. 6—9u latis, c. 6— 7 // altis, latitudine plerumque c. duplo longioribus, 

 nonnunquam lateraliter confluentibus. Fila erecta 4 — 7-cellularia, aequalia vel in 

 inferiore parte nonnunquam sursum paulo attenuata, 5—11/7. lata, cellulis longitu- 

 dine vario, inferioril)us nonnunquam non nisi dimidiam pai-fem latitudinis attingen- 

 tibus, superioribus latitudine ssepe duplo longioribus, chromatophorum singulum 

 continentibus. Pili hyalini Icrminales nonnunquam sparse occurrunt. Sporangia 

 in filis erectis terminalia, solitaria, rarius bina, ellipsoidea, 23 — 30 longa, 14 — 18/^ 

 lata, oblique cruciatim divisa. Organa sexualia ignota. Cellulse auxiliarise (?) bre- 

 vissimse in parte media vel superiori filorum seriataj. 



The cells of the basal layer form regularly radiating filaments of varying breadth. 

 Lateral fusions may be wanting in some cases, while in others they occur in great 



