lUO 



Tliis inconspicuous species lias been found epipliylic on Polysiphonia violacea 

 and nigrescens, in company willi other species of Chantransia (viryatiila, hallandica 



etc.), at several places 

 but in small quanti- 

 ties. It has been met 

 with in May to Sep- 

 tember , in depths 

 from 1 to 11,5 meters, 

 and was collected with 

 sporangia in the same 

 months. 



Localities. Kli: Krage- 

 skovs Rev, KG. - Ks : D, N. 

 of Isefjord, 11,5 meters. 

 Sa: AH\N. of Fyens Moved; 

 MQ, S. of Sams0, 11,5 me- 

 ters. Sii: Stone-slope at 

 Helsinger (Kronborg). -- 

 r,j^ Bw: LC, S. of Langeland, 



Chanlransia iiwiiilifurmis. Adult |il;inls willi sporangia. A— C Iroin Melsingor, Sep- meters. - Bill: QR, 



teniber, D liom AH'. In /) rull-giown sporangia, in B tlie sporangia have been enip- Gj'ldenloves Flak, 

 tied and new sporangia are developing within their membranes. 300:1. 



Group II. Frond epiphytic with a piuriceilular basal layer, 

 (i. Chantransia Thuretii (Born.) Kylin. 



Kylin (1907) p. 119. 



Chantransia cfflorescens var. Thuretii Bornet (1904) p. XVI pi. I. 

 a, amphicarpa nob. 



Of this species, which is quite distinct from Ch. efflorescens (J. Ag.), as shown 

 l)y Kyi.in, I have found specimens fully agreeing with Kylin's description and 

 drawings. Such specimens, provided with monosporangia and sexual organs, were 

 met with repeatedly in July near Frederikshavn. In some cases the sporangia and 

 the sexual organs occur on different branches of the same plant, but as shown by 

 Kylin, the sporangia are often situated near the sexual organs, and all the three 

 kinds of organs of reproduction may then occur very close together, as is seen in 

 lig. 30 B, where the same cell bears a carpogonium and a sporangium, while a 

 cluster of antheridia is situated on the next branchlet. Also in lig. 31 B, the spor- 

 angium is situated close to the carpogonium and in fig. 31 A a two-celled branchlet 

 is seen to bear a carpogonium, an antheridium and a sporangium. 



When not occurring together with the sexual organs the sporangia are situated 

 on the inner side of the branches near the base, usually 2 or 3 together on one-celled 

 branchlets, or they are sessile at the same place; more rarely the branchlets are 2- or 

 3-celled. It may sometimes happen, that two sporangiferous branchlets are seated 

 on the same cell, the one over the other (fig. 30 A). On maturation the spore leaves 



