298 Al^ae. 



to' 



Dainos, L. L., Comparative development of the cysto- 

 carps of Antitharnnion and Pvionitis. (Univ. California Public. 

 Bot. IV. 16. p. 283—302. pl. 32-34. March 31, 1913.) 



In connection with his investigadon of cystocarpic development 

 in the 2 genera mentioned the writer was led to examine the cri- 

 teria for the Separation of the Florideae into groups from the Olt- 

 manns Standpoint, as well as from that of Seh mitz. He concludes 

 that the Florideae may properly be arranged as by Oltmanns in 

 the following 5 groups: Nernalionales, Gigarthiales, Rhodymemales, 

 Ceraniiales, and Cryptoneniiales, upon the basjs of differences in 

 their cystocarpic development which are here summarized. 



Maxon. 



Gardner, N. L., New Fucaceae. (Univ. California Public. Bot. IV. 

 18. p. 317—374. pl. 36—53. April 25, 1913.) 



In addition to a further account of the 2 recentl}' described 

 genera Hesperophycus Setchell and Gardner and Pelvetiopsis Gard- 

 ner, the following new species are described: Halidrys dioica Gard- 

 ner, from California; BlossevUlea Brandegeei Setchell and Gardner, 

 from Guadelupe Island, of the coast of Lo wer Cal iforn ia ; 

 and Cystoseiva Setchellü Gardner, from California; all of which 

 are elaboratel}'- illustrated. Maxon. 



Letts, A. E., On the occurrence of Prasiola crispa on [Sewage] 

 Contact Beds, and its resemblance to Ulva latissima. 

 (Journ. Roy. Sanitary In.stitute. XXXI. 10. p. 464— 4ö8. 1913.) 



The author notes the occurrence on sewage filter-beds of a 

 luxurions growth of the alga Prasiola crispa, and describes some 

 experiments dealing with its power of absorbing nitrogen , compa- 

 ring the results obtained with those described by him for Ulva. 



The araount of nitrogen in the dried frund is exceedingly high: 

 from Belfast Sewage beds 8.94 per cent, which is nearly as high 

 as that of dried meat (10 5 per cent), and higher than that of dried 

 cheese (7 per cent). London samples contained 7.2 per cent of 

 nitrogen. Experiments show that Prasiola possesses the same re- 

 markable power of absorbing ammonia as Ulva, the rate of absorp- 

 tion in that alga following a definite physico-chemical law known 

 as that governing mono-molecular reactions. A. D. Cotton. 



Lucas, A. H. S., Notes on Australian Marine Algae. I. 

 (Proc. Linn. Soc. New South Wales. XXXVIII. l.p. 49— 60. pl. 1-5. 

 March 1913.) 



The following species are treated of in these notes: Tiirbinaria 

 ornata of which a new form racemosa from Torres Straits is 

 distinguished; it is suggested hat T. Murrayana may be a simple 

 unbranched reef-growing form of T. decurrens, Cystophylluni muri- 

 catiim, Hormosira articulata, recorded here from Port Stephens; 

 Noiheia anotnala, the genus Haliseris ; Spermatochmis Lejolisii, My- 

 riocladia sciuriis, and Ulva Lactuca. Three new species are descri- 

 bed, Nitophylltim sinuosum, allied to N. crispatum but differing 

 in outline and colour; Pteronia ititermedia, intermediate between F. 

 ausiraliasica and P. suhulifera, both from Tasmania, and Polysipho- 

 nia compacta from Port Jackson. New records are given for New 

 South Wales and for Tasmania. E. S. Gepp. 



