Brook : Summary of Methods of Microscopical Research. 33 



Cladophora glomerata, L. Mere, Scarborough, G. E. M. 



ITlotlirix rivularis, Ktg. Morley, near Bingley, W. W., new record 



Tolypothrix lanata, DesY. Harrogate, T. Hick, new record. 



Oscillaria aiitumnalis, Hook. Scarborough, G. E. M. 



O. nigra, Yauch. do do 



O. limosa. Ag. do do 



Chantransia Hermanni, Roth. Shipley Glen & North Dean, W. W. 



Tetmemorus Brebissoni, Relf. Near Halifax, W. W., new record. 



Staurastrum dejectum, Breb. Mere, 



Scarborough, 



G. E. M. 



do 



Euastrum didelta (Turpin), Ralfs. 



do 



do 





Pandorina morum, Bory. 



do 



do 





Pediastrum Rotula, Braun. 



do 



do 



do 



Closterium Liebleinii, Ktg. 



do 



do 



do 



C. lunula (Muller), Ehrb. 



do 



do 



do 



Cymbella gastroides, Ktg. Morley, 



near Bingley, W. W. 





Pleurosigma attenuatum, Sm. 



do 



do 





Ceratoneis arcus, Ktg. Goathland; 



Howgill Fell 



s, W. W. 



do 



Additions and Corrections. — The following species may be added 

 to the list of West-Riding algae already published : — LeptotUrix 

 parasitica, Ktg., Bradford, Baildon ; Oscillaria Frdlichil, Ktg., Eld- 

 wick; Pinnularia oblonga, Rabenh., Adel, Bingley; Xanthidiuvi 

 armatiiin, Breb,, Adel ; Closterium BiancB, Ehrb., Bingley, Baildon ; 

 C. striolatum, Ehrb., Baildon. The PlagiocJula trideuticulata reported 

 from Miller's Dale last month is a small tridenticulate form of P. 

 asplenioides. 



ON THE METHODS OF MICROSCOPICAL RESEARCH 

 IN USE IN THE NAPLES AQUARIUM. 



SUMMARY (By GEO. BROOK, F.L.S.) of a Paper by Dr. Paul Mayer, in 



THE " MiTTHEILUXGEN A. D. ZoOLOG. STATION, ZU NeAPEL," YOL. 2, PART 1, 1880. 



{Continued.) 



Carmine and Picro-Carmine, Sfc. — With regard to the aqueous 

 solutions of staining media, they are, generally speaking, only used 

 when those dissolved in alcohol are of no use. The chief detriments 

 to their use have already been mentioned. The interpretation of the 

 results obtained by carmine staining is not always satisfactory. For 

 instance, in his work on the nervous system of Aquilla, Bellonci 

 describes peculiar halfmoon-like structures in the ganglion cells ; 

 Dr. Mayer is of opinion that these are entirely artificial productions, 



