48 M. F0SL1E. [1905 



observe that the specimens from Greenland recorded below are 

 those mentioned by Dr. Rosen vinge 1. c. I referred them to a 

 form identic with L. TJngeri. There are only two specimens 

 known. One is from Sukkertoppen, having been about 10 cm. in 

 diameter and hollow owing to the attacks of animals, the peri- 

 pherical portion left being only about 1 cm. thick, the branches 

 being fastigiate and but slightly curved and rather coalescing. It 

 resembles old and hollowed Norwegian specimens of L. TJngeri 

 and L. breviaxe. As remarked above under the former species, 

 such specimens also much approach L. fomicatum in the sense 

 now taken, or certain forms of L. tophiforme, but are more con- 

 sistent with specimens of L. TJngeri and L. breviaxe having been 

 attacked by animals. I have never seen L. tophiforme hollowed. 

 The said specimen bears conceptacles of sporangia 300 — 400 p- in 

 diameter, but I have not succeeded in. finding any sporangia. I 

 refer it to L. breviaxe, as the other branching Lithothamnia known 

 from Greenland bear two-parted sporangia and not four-parted ones 

 as in L. Ungeri in the sense now taken. ■ — The specimen from 

 Julianehaab was fragmentary, when collected, and the branches 

 are less fastigiate than those of the other specimen. It bears scars 

 from the conceptacles emptied, and probably belongs to the same 

 species. — From Labrador only one specimen is in hand. It is 

 compressed-spherical, about 10 by 6 cm. in diameter. It is not 

 hollow, though it is in the central parts partly dissolved by boring 

 mussels, and the branches are rather coalescing, but somewhat 

 curved. I, therefore, refer it to L. breviaxe. It is provided with 

 rather numerous conceptacles of sporangia. But also here I have 

 not succeeded in finding sporangia. Accordingly the determination 

 of these specimens is not quite certain. 



Area: Norway: Kjelmo in Sydvaranger and Skarsvaag near 

 the North Cape(!); North America: „Some point on the coast of 

 Labrador within the province of Quebec, on the coast of the Gulf 

 of Saint Lawrence, within the islands of Cape Breton and New- 

 Foundland" (A. K. Mack ay I) 1 ); West-Greenland: Sukkertoppen, 

 Julianehaab (Rosen vinge!) 1 ). 



*) Cp. the remarks on the distribution of the species. 



