382 



looked rather poor, the main branches being more or less naked 

 and new branches few in number. This partly corresponds to 

 Kleen's report (1. c. p. 21) that it »Begins to appear in the begin- 

 ning of Jnly«; but how far the Færoese algæ are annual, as Kjell- 

 man — according to Kleen — reports being the case with those oc- 

 curring at Nordland, I am not capable of deciding, I am most in- 

 clined to think that the basal part of the plant survives the winter 

 and gives out new shoots. 



Regarding its habitat Lyngbye writes: — »Habitat ad insulas Færo- 

 enses in inferiore refluxus limite scopulis adnascens, copiose«; this is 

 quite true as it is very common on all the shores of the Færoes which 

 are exposed to the open sea. 



The following list of localities will show how commonly it occurs: — 

 Str.: Velbestad (!), Kvivig (Lyngb.,!), Hojvig (!); Ost.: Gjov (!), Ejde (!), 

 Eldevig (Lyngb.) ; Bordo: Klaksvig (H.J.) ; Vid.: Vi derej de (!), Vedvig (H.J); 

 S vin 6 (H.J.,!); Vaago: Midvaag (!), north side (!); Myggenæs (!); Sando: 

 Troldhoved f!); St. Dimon (!); Syd.: south-east coast (!), Vaags Ejde (!), 

 Trangisvaagfjord (!), Frodebo (!). 



52. C. granulatum (Duel.) Ag. 



In a collection of Callithamnion arbuscula gathered by H.Jons- 

 son was found a small Callithamnion which differed from the 

 others in habit. By looking through the Ca//z7/iammon -material 

 preserved in Lyngbye's Herbarium I found another example of 

 the same species. Dr. Bornet, to whom I sent a few specimens, 

 kindly tells me that he thinks they are identical with Callithamnion 

 granulatum. 



To judge from its few habitats along the Færoes the species 

 must occur there between tide-marks, perhaps associated with Calli- 

 thamnium arbuscula and like the latter on exposed coasts. Found 

 bearing tetraspores in August and cystocarps and antheridia in 

 November. 



This species, which is presumably rare along the Færoes, has 

 hitherto been found only at the following piaces: — Svind: (H.J.); Ost.: 

 Kidevig at the entrance to Fundingfjord (Lyngb.). 



53. C. copymbosum (Smith) Lyngb. var. amphicarpa Thur. Le 

 Jolis, Liste, p. 112; Thuret et Bornet, Etudes phycologiques, p. 67, 

 tab. 34. 



In a collection of algæ from Ore (Ost.) a few specimens of a 

 small gracefu] Callithamnion were found intermixed amongst several 

 other algæ; it is remarkable for the facl that the same plant bears 

 both cystocarps and antheridia as well as tetraspores. On account 



