766 Bacillarleae, Striatellaceae, Striatella. 



Hab. ad Algas ex oris insulae CeylonaB et Mauritii (W. Smith, 

 Cleve); ad (( El Tor» maris rubri (Fraubnfeld) ; ad oras Brasi- 

 liae (Grunow); inter Bacillarieas ex (( Honduras » reportatas 

 (Kirchenpauer); in « Polycystineeo-Gestein » insulae «Nankoori» 

 (Grunow). — Foramina rotundata, subinde lineis paullulo obliquis 

 interpositis. Longit. valvre 75-170 » 7,5 » 8,5; latit. frustul. 75-95 a. 



STRIATELLA Ag. [1832] Consp. Diat. p. 60 em. (Etym. stria ob adpa- 

 rentiam frustulorum), Heib. [1863] Consp. p. 71, Rabenh. Fl. Eur. 

 Algar. I, p. 307, Grun. in Wion. Verhandl. 1862, p. 426, V. H. Syn. 

 p. 164, De-Toni Oss. tasson. Bacill. 1890, p. 908, Hyalosira Kuetz. 

 [1844] Bacill. p. 125, Sp. p. 115, Rabenh. Fl. Eur. Algar. I, p. 306, 

 Grun. in Wien. Verhandl. 1862, p. 425, Thaumaleorhabrlium Trev. 

 [1848] Alg. coccotalie p. 95, Tesseila Ehr. [1838] Infus. p. 202, 

 teste Grunow. — Frustula tabulata, parce silicea, in fascias longiu- 

 scule stipitatas danse conjuncta. dissepimentis planis interruptis vel 

 continuis instructa; valvas elliptico-oblongae vel lanceolata?, rectas 

 vel sigmatoideae, pseudorhaphe et striis transversis deiicatissimis 

 praeditas, costis carentes. 



PhaBophora granuliformia, circa punctum centrale radiantia. 

 Obs. Generi Striaiellce sensu Heibergii jamdudum emeudato, 

 etiam genus Hyalosiram, Kuetz., pra^eunte Grun. in V. H. Syn. 

 p. 165, subiunxi. 



Subgen. I. Thaumaleorhabdium (Trev.) De Toni : Dissepimenta per totam lon- 

 gitudinem (altitudinem) frustulorum (e facie connectivali visorum)continua. 

 Species majores. 



1. Striatelia unipunctata (Lyngb.) Ag. Consp. p. 61, Kuetz. Baciil. 3077 

 p, 125, t. 18, f. 5, t. 24, f. 3, W. Sm. Br. Diat. II, p. 37, t. XXXIX, 

 f. 307, Rabenh. Alg. n. 1344, Fl. Eur. Algar. I, p. 307, f. 83, 

 Grun. M. M. J. 1877, t. 194, f. 7, 0' M. Ir. Diat. p. 320, t. 29, 

 f. 6, V. H. Syn. p. 165, t. 54, f. 9-10, Fragilaria unipunctala 

 Lyngb. Hydroph, t. 62 G, Heib. Consp. t. V, f. XVI, Achnanthes uni- 

 punctata Grev. Scot. Cr. flor. t. 287, Tessella pedicellata Dujard. 

 Zoophyt. p. 670, t. XX, f. 14, Tesselli arcuata Ehr. Inf. p. 202 

 excl. syn.?, Diatoma arcuatum Hoffm.-Bang nec Lyngbye, teste 

 Kuetzing. — Circiter 60-80 c; 10, valvis late lanceolatis, pseudo- 

 rhaphe distinctissima, subtilissirae punctatis, punctis in lineas incur- 

 vas dispositis; frustulis e facie connectivali visis dissepimenta nu- 

 raerosissima totam frustuli longitudinem percurrentia, in interstitiis 



