196 



The carpospores are 19 — 29 /^t in diameter, willi the envelope 35—40 /^; a nucleus 

 is seen in the centre. How many such rows belong to each cystocarp I cannot 

 say; according to Batters (1. c. p. 91) each cystocarp consists of one, two or three rows. 



Sporangia were only met with in two specimens after evacuation. According to 

 Crouan, Harvey and others they are regularly cruciate ^ 



The species has been met with in several places from Skagerak to the Sams0 

 waters and the Sound, usually in considerable depths viz. from 13 to 25 meters, in 



Skagerak however also in 

 2 m and in the Limfjord 

 in 6 meters depth. It grows 

 on stones (granite and flint) 

 and old shells of bivalves 

 {Cyprina, Mytilus modiola 

 a. o.) and gastropods, and 

 Serpula, frequently in com- 

 pany with Crnoria pellita. 

 It is perennial, but has 

 only been collected in the 

 months of April to Sep- 

 tember. Most of the spe- 

 cimens were sterile, but 

 two specimens with emp- 

 tied sporangia were found 

 in the eastern Kattegat in 

 April and May, and some 

 collected in the Samso waters in August had antheridia and carpogonia, partly ferti- 

 lized, and long sporogenous filaments. Specimens with ripe cystocarpia were col- 

 lected in August olT Lonstrup in Skagerak. According to Batters it is fructifying 

 in January to June at England's east coast. 



Localities. Sk : At Roshage, Hanstliolm, near land, 2 m; ZK" and ZIC' off Lanstrup, 7 — 13 m. 

 — Lf: Nissum Bredning, off Helligso. 5,5 m. — Kii : Herthas Flak; Bochers Banke, 29 m; TO, T0nne- 

 berg Banke; ZB, east of Trindelen, about 30 m; TR, FF and TQ near Trindelen ; VU, east of Nordre 

 Roiiner, 15 m; N.E. of Hirsbolmene, 9,5 m (Henn. Petersen). — Ke : IL, IF, IQ, ZE' Fladen, 21—25 m ; 

 ZJ, IB, IS, VZ, Groves Flak, 22,5— 26,5 ni; Groves Flak (Bargesen); IK, IH, Lille Middelgrund; Store 

 Middelgrund, lA, 16,5 m (!) and 30 m (Bargesen). — Sa : KI, south of Hjelm, 13 m; BF, off Sletterhage, 

 14 m. — Su: bM, South of Hveen, 22,5 m. 



' The above was written long before I received V. Schiffner's Studien iiber Algen des adriatischen 

 Meeres (Wiss. Meeresuntersuch. N. F. 11. Bd. Abt. Helgoland, Heft 2, 1916). The author describes here 

 (I. c. p. 148) a species named Criioriella Dubyi, whicii lie supposes is identical with the Atlantic species 

 of the same name. This supposition, however, seems to be doubtful, the Adriatic plants apparently 

 differing, in the structure of the frond and of the nemathecia as well. Thus, the frond is said to be 

 rarely more than 6 cells thick; nothing is said as to the complex structure of older fronds described 

 above; and the rhizoids seem to be much more numerous. Further, the paraphyses are said to be 

 attenuated upwards. The author says, p. 148, that the species has been wrongly referred by De Toni 

 to Cruoriella, but p. 501 he approves that Schmitz has made tlie same determination. 



Cnioiiflla Dubiji. Vertical section of neiiuilheciiim willi ripe cystocarps. 200:1. 



