Racillarieio, Striatellacea;, Tabellaria. 743 



t. 9, ['. 18, Sin. Sp. T. n. 650, Grammalophora? Balfouriana 

 W. Sm. Br. Diat. II, p. 43, t. LXl, f. 383, Distphonia australis 

 Ehr. Mikrog. t. XXXV, A, f. 7, teste Pritchard. — Characteres 

 generis; valvis linearibus vel obloMgis, 20-55 y.. longis, utroque fine 

 rotundatis, striis trausversis 20-22 iii 10 u., granulatis. 



Hab. in aqua dulci Angliae, Hibernise et Scotise (Grbville, W. 

 Smith), Gallise australis, montiuin Pyrena3orum, per tractum al- 

 pium passim; in Moravia (c in Mitteloppaquelle am Altvater» (J. 

 (Nave), inter Bartramiam iii Styria (Leyboldt sec. GruNOw), 

 inter B r y u m p s e u d o t r i q u e t r u m ad ((Botzen» Tyrolia3 (HatjsS- 

 mann), in Spetsbergia et «Beeren Eiland» (Lagerstedt). 



TABELLARIA Ehr. [1839] in Ber. 1840, p. 217 (Etym. tabella, ob fru- 

 stula tabulata), Wigand in Hedwigia II, n. 8, t. VII, V. H. Syn. 

 p. 152, Kirchn. Alg. Schles. p. 210, Brun Diat. Alp p. 130, De- 

 Toni Osserv. tasson. Bacill. 1890, p. 907. — Frustula quadran- 

 gula, tabulata, primitus afflxa et in fascias conjuncta, mox soluta 

 et angulis per isthmum mucosum concatenata, dissepimentis planis 

 plerumque alternantibus instructa; valvae medio et apicibus plus 

 minusve inflatse, transverse striatae, non costatse. Phaeophora gra- 

 nuliformia, sparsa. Auxosporse binse e cellula matricali singula ortse. 



1. Tabellaria fenestrata (Lyngb.) Kuetz. Bacill. p. 127. t. 17, f. XXII, ?!>87 

 t. 18, f. II et i. 30, f. 73, Rabenh. Sussw. Diat. pag. 62, t. 10, 

 f. 1, Bac. exs. n. 37, Alg. n. 1361, Desmaz. Cr. Fr. ed. nov. n. 511, 

 W. Sm. Er. Diat. U, p. 46, t. 43, f. 317, Pritch. Inf. p. 807, t. 13, 

 f. 29, Grun. in Wien. Verhandl. 1862, p. 410, t. VH, f. 20, Brun 

 Diat.Alp. p. 130, t. 9, f. 13, V. H. Syii. p. 162, t. 52, f. 6 8, Tabell. 

 trinodis Ehr. in Ber. Berl. Akad. 1840, p. 251, Mikrogeol. t. 33, 

 II, f. 19, t. 38, XVII, f. 21-22, t. 33, XXVI, f. 27, XII, f. 32, t. 23, 

 VII, f. 17, t. 35 A, f. 27, Abh. 1869, tab. 1, A fig. 2, Diatoma 

 fenestraium Lyngb. Hydrophyt. Danica t. 61. — Valvis linearibus, 

 valde elongatis, medio apicibus subsequaliter valdeque inflatis, 70- 

 100 u.. longis, pseudorhaphe angusta, inflationibus dilatata, striis 

 transversis 10 in 10 y.., subtiliter punctatis; frustulis e facie con- 

 nectivali visis angustis, dissepimenta interiora pauca (pleruraque 2 

 paria) subrecta opposita praebentibus. 



TTnb. in aquis dulcibus per totam Europam, passim. — Var. 

 intermedla Grun. in V. H. Syn. t. 52, f. 6-8: ad Tab. ftocculosam 

 transitura efficiens. Cum specie. — Var. asterionelloicles Grun, in 



