Bacillarieae, Naviculacese, Frustulia. 279 



lipticis, quam in F. interposita brevioribus, nodulis terminalibus 

 plerumque inconspicuis; striis transversis acutis, parallelis, 20-21 } / 2 

 in 10 fx. 



Hab. ad u Paralba harbour » Americae australis (Lewis) ; in 

 u Wilmington River, Savannah, Ga » (C. Febiger). 



6. Frustulia bohemica (Ehr.) Rabenh. FI. Eur. Algar. I, p. 228, Na- U64 

 vicula bohemica Ehr. Mikrogeol. t. X, 1, f. 4, Abh. 1870, t. 2, 



I, f. 34, Pritch. Inf. p. 897, Schum. Preuss. Diat. 1867, t. 9, f. 40, 

 Dannf. Diat. Balt. p. 29, Fresen. Beitr. in Senck. pag. 65, t. IV, 

 f. 10-13, A. Schm. Atlas t. 49, f. 43-45, Grun. in Mois. u. Neum. 

 Beitr. Palaeont. 1882, p. 157, Navicula pannonica Grun. in Wien. 

 Verhandl. 1860, pag. 541, t. 2, f. 40, Rabenh. Fl. Eur. Algar. I, 

 p. 174, Nanicula costala Kuetz. Bacill. p. 93, t, 3, f. 56, Navi- 

 cula polygramma (Ehr.) Schum. Diat. H. Tatra p. 75, t. 4, f. 56?, 

 Anomoeoneis bohemica Pfitz. Unters. Bacill. pag. 78, Slauroneis 

 polygramma Ehr. Amer. p. 135. t. 2, VI, f. 30 ? — Valvis rhom- 

 beis vel lanceolatis, 100 ^25, apicibus obtusis, lineis longitudinali- 

 bus parallelis tribus medio interruptis notatis, punctato-striatis ; 

 striis transversis parallelis, rectis, punctis in lineas aliquot undu- 

 latas seriatis, lineis longitudinalibus approximatis, area media levi 

 transverse extensa ; nodulis terminalibus minutissimis, rotundatis; 

 frustulis e facie connectivali visis linearibus, utroque fine rotun- 

 dato-truncatis. 



Uab. in aquis dulcibus prope Francofortum ad Moenum (Fre- 

 SENius) et locis variis Gotlandiae, Uplandiae etc. (Dannfelt), 

 Spetsbergise (Lagerstedt), montium tatrensium (Schumann) ; in 

 aqua subsalsa ad ripas lacus Peisonis Hungariae (Grunow) ; sub- 

 fossilis in Uplandia (Dannfelt), fossilis in Bohemia (Ehrenberg), 

 Sicilia (Grunow), ad «Soos» (Grunow), in Succino Borussiae (Schu- 

 mann). — Color frustuli exsiccati violaceo-brunneus. — Cfr.: Var. 

 fossilis (Ehr.), Navicula fossilis Ehr. Mikrogeol. tab. 10, I, f. 6, 

 Navicula bohemica var. A. Schm. Atlas t. 49, f. 45. 



7. Frustulia trigramma (Fres.) Rabenh. Fl. Eur. Algar. I, pag. 228, n65 

 Navicula trigramma Fresen. Beitr. p. 64, t. IV, f. 1-9. — Lan- 

 ceolata, 90-130 u. longa, apicibus obtusis, lineis longitudinalibus 

 tribus medio interruptis notata, punctato-striata; striis transver- 



sis parallelis, rectis punctisque lineas longitudinales non attingen- 

 tibus, area transversa levi raro perspicua,- nodulis terminalibus 

 rotundatis; frustulis e facie connectivali visis linearibus, utroque 

 fine rotundatis. 



