77G SUMMA.KY OF CURRENT RESEARCHES RELATING TO 



Dr. Hansgirg proposes the following classification of the Confer voiclciB 

 or Noniatophycca) : — 



A. Vegetative cells iminiicleated. 



1. CoLEOCHiETACEyT;. 



a. AnoogaiuaB : — Aphanochsete Berth., Clipetopeltis Berth. ; 



doubtful, OMoch set eThsv., Acrochsetclh-iu'^s., Phccophila 



Hauek, Bvlbocolcon Brings. 

 h. Oogamfc : — Cvleocheete Breb. 



2. CEdogoniaoe^. 



(Edogonium Link, Bulhoclieete Ag. 



3. CyLINDROCAPSACEiE. 



Cijllndrocaj)sa Eeinsch. 



4. Trentepohliace^. 



a. Chroolcpidaeeae : — Trentepoldia Mart., Lcptosira Bzi., 

 Tricliopliilus Web., Ctenodadiis Bzi., Microthamnion Ktz., 

 CJdorotylium Ktz., Pilinia Ktz., Acrohlaste Beiusch, 

 Chlorothamnion Bzi. ; doubtful, Bidbotrichla Ktz. 



h. Myeoidaceae : — PJiycopeliis Mill., Mycoidea Cunu. 



5. IjLOTHRICHACEiE. 



a. Ulothrichcae : — Hormidium Ktz., Scldzogonium Ktz., 

 Hormiscia Aresch., Ulothriv Ktz., Gloeotila Ktz. ex p. 



h. ChfetophoracecB : — Sfiffeoclonium Ktz., Endodonimn Szym., 

 Entodadia Reinke, Chseiophora Schr., Braparnaldia Ag., 

 Clisetonema Now., Herposteiron Niig., Bcinkia Bzi., 

 Cldorodonium Bzi , LitJiobryon Rupr. 



c. UlvaeefE : — ZJ/i-a L., Monostroma Thr., Enteromorplia 

 Link., Zelterstedtia Ag., Ilea Ag., Diplonema Kjell., 

 Schizomeris Ktz., Protodcrma Ktz., Bermatophyton Pet., 

 Ulvella Crouan, Prasiola Ag. 



B. Vegetative cells 2-multinucleated. 



6. CoNFERVACEiE. 



a. Confervcfc : — Conferva L., Microspora Thr., Chsctomorpha 

 Ktz., Bimidearia Wittr., BMzodonium Ktz. ; doubtful, 

 Confcrvites Brongn., Bictyothde Bzi., Urospora Aresch. 



h. Cladophoracefe : — Cladopliora Ktz., Chlorapteria Mont., 

 Pcripldegmat'mm Ktz., Gongrosira Ktz. ex p. 



c. PithophoracejE : — Pithoplwra Wittr. 



C. Vegetative cells multinucleated. 



7. SPH^ROPLEACEiE. 



Spliaeroplea Ag. 



New Genera of Perforating Algae.* — MM. E. Burnet and C. 

 Flahault refer to the two algfe de^cribed by Lagcrheim | as perforating 

 the shells of molluscs, viz. Codiolum piolyrhizum uml Mast'igocoleus testarum. 

 TLicy point out that the so-called chroococcoid cells of the latter alga 

 do uot belong to it at all, but to an altogether distinct species, which 

 they" now describe as the type of a new genus under the name Hyella 

 csespitosa. 



The genus Hyella is regarded by the authors as the highest typo yet 

 known of the order Chamfesiphonaceas. It forms, when young, circular 

 patches of an olive colour composed of radiating filaments permeating 



* Morot'd Journ. de Bot., ii. (1888) pp. 161-5. 

 t See this Journal, 188G, p. G65, 1887, p. 285. 



