534 Bacillariese, Nitzschiacea?, Nitzschia. 



neatis; punctis cariualibus circiter 5 striisque tratisversis 27-29 

 in 10 [j.., teste Smitli tantum 22 in 10 u.., punctis striarum in lineas 

 longitudinales irregulares, subundulatas dispositis. — Var. nana 

 Grun. in V. H. Syn. pag, 180, t. 67, f. 3, Typ. n. 399: parva, 

 sigmoidea, ad 40 ^. longa; punctis carinalibus 10-11 striisque 

 transversis circiter 35 in 10 (j..; pseudonodulo centrali distiQctis- 

 simo. — Var. brevissima Grun. in V. H. Syn. p. 180, t. 67, f. 4, 

 Typ. n. 400, Nitzschia parvula Lewis nec alior: valvis lineari- 

 bus, latiusculis, leniter medio sigmoideis subconstrictis, apicibus ro- 

 stratis; punctis carinalibus majusculis circiter 8 striisque trans- 

 versis 30-36 in 10 y.. In aquis subsalsis pr. Anversam Belgii (Van 

 Hedrck). — Var. Schweinfurtliii Grun. in Cl. et Gr. Arct. Diat. 

 p. 92: valvis 270 ::; 7-8, apices versum sensim attenuatis, striis 

 transversis 28-29 in 10 u.. Ad deltam flavii Nili Africse (Schwein- 

 furth); in lacu salso pr. uHalle)) Germaniae etc. (Grunow). — Var. 

 lepidula Grun. loc. cit, : valvis 70-110:5 4-4,5, punctis carinalibus 

 7-8 striisque transversis circiter 31 in 10 a. Ad Christianiam, uWe- 

 sterhotten)); in salinis pr. Tergeste. — Var. scalpelliformis Grun. 

 in Cl. et Gr. Arct. Diat. p. 92, V. H. Syn. pag. 180, t. 67, f. 2: 

 typo brevior, angustior, 60-80 :i 6-7, apicibus magis sigmoideis et 

 abruptius unilateraliter truncatis; punctis carinalibus 7-8 striisque 

 transversis 26-27 in 10 u.. In aquis subsalsis ad oras Europas ; 

 adsunt etiam formse minores valvis 36-60 ^ 4,5-6, punctis carina- 

 libus 9-10 striisque transversis ultra 22 in 10 a. — «An huc 

 Homoeocladia Vidovichiil )). 



114. Nitzschia cryophlla Cleve Diat. Vega p. 450, t. 38, f. 74 (iV. 2108 

 krtjophila). — Linearis, apices versus leniter sigmoidea, 140 ;? 6; 

 punctis carinalibus 8 in 10 /jt. , medio absentibus et hic pseu- 

 donodulura parvum linquentibus; striis transversis 20 in 10 p.., 

 punctatis. 



Hah. ad Caput «Wankareraa)) (Cleve). — An, ut docet clarus 

 Cleve, NitzschicB obtusce W. Sm. varietas? 



115. Nitzschia Kurzii Rabenh. in CI. et Gr. Arct. Diat. p. 92, CI. 2109 

 et Moell. Diat. n. 78, H. L. Sm. Sp. typ. n. 351. — Valvis linea- 

 ribus, leniter arcuatis, 100-140^9, apicibus oblique cuneatis, sub- 

 inde raedio tenuiter angustatis ; punctis carinalibus circiter 7 striis- 

 que transversis, 30-32 in 10 u.. 



Hab. in aquis subsalsis Bengaliae, frequenter (Rabenhorst). — 

 Nitzschice obtusce W. Sm. proxime accedit. 



