360 Bacillariese, Cymbellacese, Cymbella. 



f. 67-68. — Valvis parum cymbelloideis, subellipticis, mediocribus, 

 rhaphe zona hyalina longitudinali cincta, nodulo centrali rotun- 

 dato, distinctissimo; striis subtiliter punctatis, leviter radiantibus, 

 subconfertis. 



Hab. in aquis dulcibus ad «Pordoneg» in Tirolia (Grunow). 

 — Cfr. var. Atlas t. 71, f. 69 (ex alpibus « Artpatscher»). — Var. 

 excisa Grun. in Mois. u. Neum. Beitr. Pakeont. (Est. Ung. und des 

 Orients 1882. Fossilis. — Var. prisca Grun. 1. c. Fossilis. 



45. Cymbella euricephala Rabenh. Fl. Eur. Algar. I, p. 79, Cymbella 1426 

 pachycephala Rabenh. Siissw. Diat. p. 22, t. VII, f. 10, Pritch. 

 Inf. p. 876. — Robusta, mediocris, 30-35 a. longa; valvis mar- 

 gine dorsuali elevato, ventrali leniter inflato, sub polis constrictis, 

 apicibus porrectis capituliformi-rotundatis ; striis granulatis, remo- 



tis, 2-2 l / 2 in 10 [x. 



Hab. in Cladophora glomerata in Servia (Rabenhorst). 



46. Cymbella epithemoides Rabenh. Siissw. Diat. pag. 22, Fl. Eur. 1427 

 Algar. I, p. 79, Cymbella costaia Rabenh. 1. c. tab. VII, f. 16, 

 Pritch. Inf. p. 876. — Mediocris, 35-42 *. longis, arcuata, apici- 

 bus obtusis, porrectis et leviter recurvis; striis validis, 2 in 10 a. 



Hab. ad Cladophoras prope Salisburgum (Sauter), ad litus 

 fluminis Rheni prope Scaphusium Cladophoram callicoraam 

 incrustans (Schenk), in aquis submarinis pr. «Liibeck» (Hecker). 

 — Epithemiam omnino refert sed nodulo centrali distinguitur. 



47. Cymbella fornicata Rabenh. Siissw. Diat. p. 22, t. X, suppl. f. 9, i 4 gl 

 Fl. Eur. Algar. I, p. 78. — Major, valvis semilanceolatis, latere 

 dorsuali valde elevato-convexo, ventrali leniter gibboso, sub polis 

 constrictis, apicibus rostrato-porrectis; striis delicatulis, vix con- 

 vergentibus, 2 l / 2 -3 in 10 *. 



Hab. ad Cladophoram glomeratam in Aragonia Hispa- 

 nise (Loscos), etiam, nt videtur, in Persia (Hohenacker). 



48. Cymbella rostrata Rabenh. Siissw. Diat. p. 22, t. VII, f. 5, Fl. H 29 

 Eur. Algar. I, p. 78. — E minoribus; valvis ellipticis, 25-26 [x. 

 longis, latere dorsuali elato-convexo, ventrali leniter convexo, sub 

 polis constrictis, apicibus obtusis porrectis; striis convergentibus, 

 manifesto granulatis, 4 l / 5 -5 in 10 u.. 



Hab. in Poutinis paludibus Italiffi (Rabenhorst). — Cymbel- 

 Im cuspidatw proxima et fortasse varietas striis granulatis minus 



densis. 



49. Cymbella Dianae (Ehr.) Ralfs in Pritch. Inf. p. 877, Grun. Alg. 1430 

 Novara pag. 16, Cocconema Dianw Ehr. Ber. Berl. Akad. 1842 





