.I.«.l 



n:i:\ \. 





Vi tabula 

 ridi 



i ' I, with ru 



branches continuous, n- 



PolyphJ 



nx. 

 . i ourn. 

 lrilofjliorum,l)on. 

 •■ it. 

 I , on, Mont 



i ii 



ed, and bran 



Utt den 



■IX. 



! ak. 

 Rhipozonium, l. 

 i . , ■ . 

 Halymeda, £ 



I Ilia, Linix. 



I, i.jmx. 



' 'i, Ku 



I 



I 

 /' 



I-k. 



- 

 i 



N'i rasas. c,i , Endl.) 



Position. — Diatomacea b. — Fuca 



Chlorospermese, // • " . p. 2. 



A tendency to a quaternary division baa 1 a remarked by Mr. Thv. . • 



u-pus Bca]ari8j Tyndaridi a insignia, and S 

 into 4 parte does do! take 1 the fruit i-- nearly 



\' ' 2 A. fissiparou8 mode of formation of the 



oata baa been described by th< - ime acute observer at p. 334 of the workjusl 

 The discovery of the Bpei la of Lichens, by M. [tzagsohn, which ! 



Buch interesting resulta in the hands of M. Tulasne, naturally induced the autl 

 extend bia - I aer din ctions. la a letti '■' I 



ami which i> published in the .1 rmali da & 

 the discovery of Bpermatozoids in Spirogyra arcl i and Conferva glomi 

 'I"'/ vmg, for the 25th of March, and list of April, of thi 



be has given a fuller report of hi- by mum 



When conjugation is commencing in the Spirogyra, but apparently not in the codju- 

 gatingthreada themselves, he finds the spiral band of < ddoi hrome gradually i ■ 



Dumber of distinct globosi - bytheauthor 



Bpermatosphaeria), within whoso cavity numei iu - an- formed, whi 



furnished with a distinct cellular wall or not is uncertain, each of which \ 



ipiral body endowed with active motion, resemb 

 of mosses. These bodies if k.-j.t in water incre 

 which requires further observation Be detected Cladophora 



iata. ami indicates bodies apparently identical with the 

 mother-cells in (Edogouium, Mo . and Bulbochsete, though in tl. 



A lutln rto ascertained the i » of the sperm I 



baa also obsi rved mother cells, hut the spermatozoids appear to a 

 form. The parent cells are themselves endowed with motion. N 



;t present been found upon the Bpermato oids. They have not, 1. 

 examined under the most favourable circumstances for the di 

 delicate organs. 



TrypothftUua, Hook A Barv. 

 Oui 



MllL 



Litkonema, //■■ 



la . 

 Axthrouoma, HauaVL 



ADDITIONAL M.M i:\. 



M - irpus .'. 



3 

 'I'll ., 



i wiophora, A 



1 1 





