-^ 60 Ife— 



Ab Aulacodisco Lunyacsekii jam dispositione punctorum evidentius 

 discernendus. 



Herr Dr. H. Chase in New-Yorlc dem Verfasser des Catalogue of the Diato- 



maceae gewidmet. 



Aulacdoiscns (margaritaceus Ralfs var. ?) Debyi nov. spec. tab. 25, fig. 

 226, *"/i. Valva nigricans, rotunda, convexa; margine cingulo levi et punctis 

 minoribus ornatus; appendiculis 6 validis, a margine distantioribus, areis levibus 

 in rimas profundas radiantes transeuntes cinctis Structura areolata, areolis 

 hexagonis papillosis in centro et superiore parte valvis majoribus 2^U in O'Ol 

 mm ad marginem 4 in 00 1 mm decrescentibus, omnibus in lineas radiantes 

 ordinatis; area centrali parva levi. — Diameter 0326 mm. 

 Szent-Peter. 



Anlacodiscns Habirshawii nov. spec. tab. 29, fig. 296, ^^%. Rotun- 

 dus, nigricans, ad peripheriam Corona punctorum minutissimorum et striolarum 

 subtilissimum cinctus, concavis, ad marginem inter appendiculis plicatus; appen- 

 diculis 5 area levi in rimam radiantem transiente cinctis; area centrali levi 

 rotunda; structura punctata, punctis centro distantioribus 2V2 in O'Ol mm, 

 marginem versus densioribus 4 in 001 mm, omnibns in lineas radiantes lon- 

 giores et breviores discurse tortas et vibratas ordinatis. Diamet. 0"221 mm. 



Kekkö, Szakal, Szent-Peter. 

 Herrn Frederich Hahirshaw, Verfasser des Catalogue of the Diatomaceae in 



New-Yorh gewidmet. 



Anlacodiscns hyalinus nov. spec. tab, 1, fig. 5, ^/i. Valvis hyalinis 

 translucentibus subconvexis; appendiculis minoribus 9, a margine distantioribus 

 areis levibus circumdatis; area centrali parva levi, seriebus duarum punctorum 

 a centro appendiculoquoque versus radiantibus, punctis ceteris in lineas sub- 

 radiantes et discurse tortas et vibratas ordinatis 3, 4, 5V2 in 001 mm, omni- 

 bus papillosis; margine subtiliter striolato. Diameter 0*2235 mm. 

 Szent-Peter. 



Anlacodiscns Gmnowü Cleve J. Q. M. Cl. 1885, pg. 171, tab. 12, fig. 8. 

 Aulacodiscus Kinkerianus E. S. Nott in Walker, Chasse N. R. Diät. 1886, pg. 3, tab. 

 1, fig. 9. — Valvis rotundatis nigricantibus, convexis, subconvexis, ad appendiculos 

 lobato plicatis; centro elevato; margine subtiliter striolato; appendiculis robustis 

 5 — 13 areis levibus circumdatis, areis in rimas profundas radiantes usque ad 

 aream centralem levem percurrentibus, textura duplici, superiore reticulato 

 squamosa, inferiore punctata; punctis crassis, papillosis, medio majoribus, distan- 

 tioribus, ad marginem densioribus minoribus, in lineas radiantes et discurse 

 tortas et vibratas dispositis. Diamet. 0*12 — 0*27 mm. Distinguendum : 



Var. gennina tab. 11, fig. 93, 95, "'/i. A. Schm. Atlas tab. 107, 

 fig. 1, 2. Structura valvae reticulato-squamosa tantum ad plicas visibilis ; mar- 

 gine subtiliter striolato et dentato. 



Bajtha, KekJcö, Mogyorod, Szakal, Szent-Peter. 



Var. snbsqnamosa tab. 1, fig. 3, ^/i; tab. 12, fig. 100, *''/x. A. Schm. 



