Bacillarieae, Achnanthaceae, Achnanthes. 481 



Sectio V. Valva inferior substauroneiforrnis, valva superior series punctorum 

 tenues' haud ostendens; ceterum ut in sectione IV. [Grun. in Cl. et Grun. 

 Arct. Diat. p. 21]. 



35. Achnanthes Baldjickii (Brightw.) Grun. in Cl. et Grun. Arct. 1952 

 Diat. p. 21, Odontidium Baldjickii Brightw. in M. J. 1859, p. 180, 



t. 9, f. 10 (valva superior). — Valvis ovato-rhomboideis, costis 

 in utroque late pseudorhaphes circiter 8, distinctis, pseudorhaphen 

 subattingentibus, circa centrum aream linearem linquentibus. 

 Hab. ad «Baldjick» pr. «Varna» (Brightwell, Grunow). 



Sectio VI. Valva inferior naviculaeformis, valva superior similis, pseudorha- 

 phe exacte mediana sine nodulis donata. [Grun. in Cl. et Grun. Arct. Diat. 

 pag. 21]. 



36. Achnanthes Hauckiana Grun. in Cl. et Gr. Arct. Diat. p. 21, V. 1953 

 H. S. t. 27, f. 14-15. — Minuta, conspicue striata; valva superiori 

 Fragilariam mutabilem eximie referente; valvis late lanceolatis, 

 raro oblongis, 17-31 «6-8, striis transversis (fere costiformibus) in 

 valva superiori subparallelis, mediis saepe uno latere paullo remo- 

 tioribus, in inferiori valva leuiter radiantibus circa nodulum cen- 

 tralem abbreviatis, inferne 9, superne 10 in 10 [j.. 



Hab. in fontibus «Reka» prope Tergeste Istria? (Hauck). 



37. Achnanthes delicatula (Kuetz.) Grun. in Cl. et Gr. Arct. Diat. 1954 

 p. 22, V. H. Syn. p. 130, t. 27, f. 3-4, Achnanthidium delicatu- 

 lum Kuetz. Bacill. p. 75, t. III, f. 21, Pritch. Inf. p. 873, t. XIV, 



f. 16, Rabenh. Fl. Eur. Algar. I, pag. 107, Falcatella delicatula 

 Rabenh. Stissw. Diat. p. 46, t. V, f. 4, Achnanthidium crypioce- 

 phalum Naeg. in Kuetz. Sp. pag. 890? — Valvis late lanceolatis, 

 habitu A. Hauckiancv, 10-20^5-7, apicibus s^epissime attenuato- 

 rostrato-subacutis, striis robustis, circ. 15 in 10 u.., leuiter ra- 

 diantibus; valva inferiore striis mediis abbreviatis et areolam trva- 

 linam rotundatam circa nodulum centralem linquentibus donata. 



Hab. in aqua submarina insulae « Wangerooge » Germanise 

 (Kuetzing), ad «Lysekil» (Grunow); in Belgio haud hucus- 

 que inventa (teste Van Heurck); in Italia (Balsamo), Helvetia 

 (? Naegeli). — Forma angustata Gutw. Mat. fl. Galicyi 1890, t. 1, 

 f. 25, Nuova Notarisia 1890, p. 71 : valvis 33,6 longis, in rnedio 

 12 [}.. latis, apicibus in T / 3 parte latitudinis angustatis, striis trans- 

 versis distinctis subradiantibus. In fonte ad «Potoczek» prope 

 uSniatyn)) Galiciae austriacae (R. Gutwinski). 



31 



