155 



flexuous or curved, 1 — 1.5 mm. thick, or occasionally less. Cp. 

 pl. 19, flg. 11 — 14, of which fig. 12 — 14 are fragments of the 

 specimen fig. 11. In the lowest part of the plant the branches 

 are somewhat anastomosed, and this anastomose also here and 

 there takes place farther up, and occasionally the tip of a branch 

 bends itself towards another branch and anastomoses with this. 

 The sur face is smooth; magnifying shows, however, in the lower 

 part of the plant numerous short striæ. 



In a longitudinal section of a branch the cup-shaped layers 

 of tissue are pretty regular and distinct, with the inner cells nearly 

 square or rectangular, about 9 — 12 fi long and 6—8 y. thick. 



Remark on the synonomy. The plant somewhat reminds one 

 in habit of that described by Esper under the above quoted name, 

 which is said also to occur „in den norwegischen Meeren". How- 

 ever, the latter is muen larger than the present species, and it 

 appears to differ in several particulars, not unlikely even being 

 a coral. 



Relation to other species. On the one side it approaches L. 

 coralloides in habit, but is larger and differs especially by its 

 branches being coarser in the lower part and much attenuating 

 upwards. On the other it appears to be råtner more nearly allied 

 to L. fiabellatum f. Granii, but distinguishes itself by its curved, 

 irregular and attenuating branches. I have not found overgrown 

 conceptacles of sporangia, and it probably is separated from both 

 the named species and, not unlikely, in fact most closely connected 

 with L. tophiforme, from which, however, it also appears to be 

 specifically distinguished. 



Habitat. Uhknown to me; is found washed ashore. 



Occurrence. A solitary specimen gathered at Kragero on the 

 south coust. 



Litho thamnion Sonderi Hauck. 

 Meeresalg. p. 273. 

 Descr. et Fig. Lithothamnion Sonderi Hauck 1. c. et t. 3. fig. 5. 



Remark on the species and addition to the description. Of 

 this species Mad. A. Weber van Bosse also kindly sent me an 



