ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 215 



Callymenia phyllophora.* —Clara K. Leavitt gives some observa- 

 tions on this alga, which was collected at the Port Renfrew Station, 

 B.C. She summarises her remarks under the following heads : Habitat, 

 Cross Structure, Minute Structure, Lamina, Fruit, Parasites. She finds 

 that the plant is elittoral, and occurs in crevices in the rocky caverns 

 where the tidal surge is strong. Only young plants were uncovered by 

 low tides ; mature plants were well beyond low tide line. The stipe and 

 lamina are both composed of three layers of tissue : an epidermis, of 

 3—5 cells in thickness ; a cortex, 2 or 3 cells deep ; and a " pith strand, 

 occupying the main cross section." Plants of Microcladia Coulter i 

 and Chlorochytrium inclusum were found on and in Callymenia phyllo- 

 phora. 



Lithothamnia of the Adriatic and Morocco.! — M. Foslie describes 

 collections of these algae made in Rovigno, the Brionic Islands, Cherso, 

 and on the coasts of Morocco. Sixteen species, with their forms, are 

 described from the Adriatic, and very full critical notes are appended to 

 the records. Among many other points of interest, the author shows 

 that the genus Sphccranthera of Heydrich cannot be maintained, as 

 S. decussata includes at least two different species, one of which is 

 Lithoihamnion Philippii Foslie. Fifteen species are recorded from the 

 •coasts of Morocco. The paper is illustrated by three quarto plates, 

 containing eighty photographs of plants, natural size. 



Marine Algae of East Greenland.} — H. Jonsson has examined 

 collections from this coast made by C. Kruuse, and finds the number of 

 species recorded from there is largely increased. Rosenvinge's statement 

 as to the difference between the marine flora of East and "West Greenland 

 is confirmed. The list published by Jonsson includes all the marine algae 

 known at present from East Greenland, and they amount to 114 species. 

 Interesting critical notes are in many cases appended to the records. 



Marine Algae of Jan Mayen.§ — H. Jonsson enumerates fifteen 

 marine algae collected on this island by C. Kruuse, six of which are new 

 records. The previously known flora for Jan Mayen included twenty- 

 one species. 



Algal Flora of the Sandwich Islands.! — E. Lemmermann has 

 examined collections of marine and fresh-water algae, including diatoms 

 and Peridineae, made by Dr. Schauinsland on various islands in the 

 Sandwich group. The additions to the flora made by these collections 

 number 178, bringing the total number of species recorded from the 

 islands up to 461. The aerophilous algae are poorly represented, while 

 the limnophilous species are plentiful. Thermophilous species occur in 

 the hot waters on Hawaii ; halophilous species in the crater lake, 

 Moanaloa, near Honolulu, and in the lagoon of Laysan. As regards 

 marine forms, the three commonest among large species are Sargassum 



* Minnesota Bot. Stud., ser. iii. (1904) pp. 291-6 (2 pis.). 



+ Wiss. Meeresunters. Kiel. Biol. Anst. Helgoland, vii. (1904) pp. 1-40 (3 pis.). 



% Medell. om Gronland, xxx. (1904) 73 pp., 13 figs. 



t> Bot. Tidssk., xxvi. (1904) pp. 20-1. 



j| Engler, Bot. Jahrb. v. (1905) pp. 007-G3 (2 pis.). 



