532 Bacillarieae, Nit-uscliiacese^ Nitzschia. 



Mandeb)) (Cleve). — Var. ?abludens Grun. loc. cit.: valvis lineari- 

 lanceolatis, haud sigmoideis, 155=; 8; punctis carinalibus SV^-^Ve 

 striisque transversis 22 in 10 ^. Cum praecedente. — Var. latiu- 

 scula GruD. in V. H. Svn. t. 65, f. 3. — Var. dJminuta V. H. Syn. 

 t. 66, f. 9. — Var. Habirshawii (Febig.) V. H. Syn. t. 66, f. 4, 

 Nitzschia Habirshawii Febiger in H. L. Sm. Sp. T. n. 346, Cl. et 

 Moell. Diat. n. 223: punctis 6, striis 28 in 10 ^. Inter « Aden et 

 Bab-el-Mandeb » (Cleve). 



106. Nitzschia flexella Suring. Alg. Japon. p. 11, t. 1, f. 12 non Br6b. 2100 

 — Facie carinali levissime sigmoidea, 42-47 s 5, sensim demum a 

 medio apices versus angustata, apicibus obtuse truncatis, valvis li- 

 nearibus, propter apices oblique abscissos parallelogramraatis an- 

 gusti formam referentibus, punctis carinalibus TV^^^V^ in 10 p.. 



Hab. inter algas aquse dulcis in Japonia. 



107. Nitzschia scabra Cleve Diat. Vega p. 480, t. 38, f. 73 a-b.— 2101 

 Valvis magnis, 170-200'!' 10, leniter sigmoideis vel fere rectis, ca- 

 rina excentrica, punctis carinalibus circiter 4 in 10 y.., striis non 

 visis; tota valvae superficie punctis sparsis asperulis obsita. 



Hab. ad Caput « Wankarema)). 



108. Nitzschia fasciculata Grun. Kasp. Alg. 1878, p. 119 [Niizschia 2102 

 Sigma var.?), V. H. Syn. p. 179, t. 66, f. 11-13, Homceocladia 

 sigmoidea W. Sm. Br. Diat. II, p. 81 salte^n ex parte, vix Niizschia 

 Homoeocladia Heib. Consp. p. 115 et Lagerst. Diat. Bohusl. 1876, 



p. 29 (punctis carinalibus magis confertis!). — Valvis plus minusve 

 sigmoideis, usque ad 95 u.. longis, circ. 6 p. latis, subinde fere 

 rectis, punctis carinalibus paullo prolongatis, 4-6 in 10 a. ; striis 

 transversis subtilibus, 28-30 in 10 ^. 



Hab. in aquis raarinis vel subsalsis passim e. gr. ad Ostendam 

 et Anversam Belgii (Grunow, Van Heurck). — Frustula S3epe 

 iu fascias conjuncta. 



109. Nitzschia valida Cleve et Grun. in Cleve Diat. from West Indian 2103 

 Archip. p. 12, t. III, f. 19, J. M. 1879, p. 33. t. II, f. 19, V. H. 

 Syn. t. 65, f. 4-5. — Gracilis, fere recta, 270-300 a. longa, sub- 

 inde etiam plus minus sigmoidea, apicibus cuneatis, punctis cari- 

 nalibus circiter 4 in 10 jj.., striis transversis subtiliter punctatis, 



18 in 10 a. 



Hab. ad ins. Virginum, rarissime (Cleve); in sinu Campechiano 

 (Grunow), ad ((Labuan)) insula? Bornei et inter ((Adon)) et ((Bab-el- 

 Mandeb )) (Cleve). — An Niizschice Sigmaiis var. ? 



110. Nitzschia neogena Grun. in Mois. et Neum. Beitr. Palaeont. 2104 



