620 SUMMARY OF CURRENT RESEARCHES RELATING TO 



have been described. The author discusses first the distribution of 

 L. calcar&um in the region of Concarneau, Finisterre, where her investi- 

 gation was carried out, and describes the forms found there. Then 

 follows an account of the habit of life of the alga and the formation of 

 " maerl," the fertilizing material made from it. The plant may be found 

 between 5 and 25 metres in depth, but mostly between 10 and 20 metres, 

 and it seems to prefer a sheltered spot and a hard substratum. Of 

 the many forms described the author recognizes as valid only six, in- 

 cluding the type form f . coralloides Crouan. The forms are distinguished 

 purely by their external aspect, for the anatomy of all is the same, and 

 very few are ever found with reproductive organs. The anatomy, how- 

 ever, is very characteristic of the species, and quite distinguishes it from 

 any other ramified species of Lithothamnium. 



Irish Algae. — J. Adams* publishes a list of synonyms of Irish algae, 

 in which the nomenclature of his previous paper, " A Synopsis of Irish 

 Algae," issued about two years ago, is brought up to date. The fresh- 

 water species are given in a separate list from the marine species, 

 and the former list has been revised by West. In the present paper 

 102 species have been added to the records in the previous paper, and a 

 considerable number of new localities have been added to the species 

 already recorded. A revised census of species is appended, and an addi- 

 tional bibliography which is complete to the end of 1909. 



A. D. Cotton f gives a very brief account of a visit to Achill and 

 Clare Island, where he found Godium elongatum and Leathesia crispa. 



Algte of Panama.} — M. A. Howe gives a short report of his expedi- 

 tion to Panama last winter for the purpose of collecting marine algae. 

 There were, however, so very few algae to be found that he had to direct 

 his attention to other branches of collecting. A marine flora seems to 

 be almost non-existent in the Bay of Panama, with the exception of cer- 

 tain encrusting algae, some Cyanophyceae, and species of Enteromorpha, 

 Chsetomorpha, Bostrycliia, Caloglossa, Catenella, and some of the Rhodo- 

 meleae. At Colon more satisfactory results were obtained. The author 

 is unable to account for the paucity of marine plant life in the region 

 of Panama. 



Algae of Brandenburg. § — E. Lemmermann publishes the completion 

 of his work on the Algae of Brandenburg. This last part contains the 

 Introduction, in which the author discourses on general subjects con- 

 nected with his work : apparatus for collecting, manner of collecting, 

 preparation of exsiccatae, fixing solutions, reagents and staining, per- 

 manent mounts, cultures, drawing, and literature. The systematic part 

 of the work contains the completion of the Flagellatae, and the treat- 

 ment of the Peridiniales, both from the general and the systematic point 

 of view. The author hopes that this book may form the ground-work 

 of a thorough study of the Brandenburg Algae and Protozoa, and to this 

 end he has given drawings of many of the Flagellatae and of most of 

 the Peridinieae. 



* Proc. Roy. Irish Acad., xxviii. sect. B. (1910) pp. 167-214. 

 f Kew Bulletin, 1910, pp. 171-2. \ Torreya, x. (1910) pp. 94-5. 



§ Kryptogamenrlora der Mark Brandenburg, iii. heft 4 (1910) pp. i-x. (1-29), 

 497-712. 





