ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 203 



the cell, movement, nutrition, multiplication, formation of colonics, 

 phenomena of attraction, occurrence, seasonal dimorphism, parasites, and 

 symbiosis. A list of literature on the subject is given, and the opening 

 lines of the systematic treatment of the group are included in this part. 



Contributions to the Algal Flora of Nordhausen.* - - F. Quelle 

 gives a list of 31 species new to the district collected by himself. 

 Among these is Surirella anceps Lewis, which up to the present time 

 has only been recorded once, and that was from the Notch Valley in 

 the White Mountains, United States, in 1S60. The conditions in which 

 this species is found living in the Hartz Mountains are much the same 

 as those of the original habitat. The author describes some of the 

 characteristic features of the species. Names are given of certain 

 Cyanophycere which constitute "water-bloom " at two localities. 



French Algae collected in the English Channel.! — J. Bessil gives 

 an account of an algological excursion lasting three days to the environs 

 of Saint- Vaast-la-Hougue, and of Barfleur in the English Channel, the 

 objects being to observe marine algae in situ, to study them alive in 

 their habitats, to obtain an idea of the marine flora in its diverse facies, 

 to learn how to collect, determine, and study algae, to become familiar 

 with their forms and names. He recounts what was done each day, and 

 gives lists of the algae found. 



Marine Algae of Lambay4 — The late E. A. L. Batters made a list 

 of about 200 species of algaa collected at Lambay, an island off the 

 coast of Co. Dublin, during a week in April 1906, during the combined 

 attempt of zoologists, botanists, etc., to investigate the natural history 

 of the island. Twenty of the species have never previously been 

 recorded from the coasts of the island, and only one species has been 

 recorded previously from Lambay. Many of the common species were 

 absent at the time of the investigation. The algal flora of the island 

 on the whole resembles most nearly that of the Isle of Man and the 

 Clyde sea area. 



Caulerpas of the Danish West Indies.§ — F. Borgesen writes an 

 ecological and systematic account of the Caulerpas of the Danish West 

 Indies, and divides his remarks into two sections, a General and a 

 Systematic part. In the General part he deals first with the external 

 conditions under which the Caulerpas live in the Danish West Indies, 

 describing the three localities as " somewhat exposed," " sheltered," and 

 in " deeper water." On much exposed shores he has never found any 

 of these plants. Under " the rhizome and root of the Caulerpas and 

 their variations under different external conditions," the author 

 describes (1) epiphytic or mud-collecting Caulerpas ; (2) sand and 

 mud Caulerpas ; and (3) rock and coral-reef Caulerpas. In the sand- 

 Caulerpas the roots " first grow vigorously without division some cms. 

 down into the bottom, and then suddenly become divided into numerous 



* Mitth. Thiiriug. Bot. Ver., 1907, pp. 36-9. 

 t Bull. Soc. Bot. France, liv. (1907) pp. 269-80. 

 X Irish Naturalist, xvi. (1907) pp. 107-10. 



§ Mem. Acad. Roy. Sci. Lett. Danemark, ser. 7, iv. (1907) pp. 339-92 (figs, in 

 text). 



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