516 Bacillariese, Nltzscliiaeese, Nitzschia. 



Sectio Vlll. Pseudo-Amphiprora Grun. [Cl. et Gr. Aret. Diat. 1880, p. 80]: 

 Valv» earina subcentrali, deflnita donatse, alte convexse, sine plicis longi- 

 tudinalibns. Puncta carinalia semper distincta. Frustula rnedio angustata, 

 pseudonodulo centrali subconspicuo. 



63. Nitzschia oceliata Cleve in Cl. et Moell. Diat. n. 154, Cl. et Or. 2or.7 

 Arct. Diat. p. 81, On sorae new or little known Diat. p. 16, t. 4, 



f. 47. _ Nitzschice hHohatce- W. Sni. similis sed carina etiam magis 

 centrali rlonata; valvis 00-108^27, medio constrictis et hic 18 a. 

 latis, tota superficie punctis inaequimagnis, rotundatis, usque ad 

 1,5 a. latis, subinde in sei-ies irregulares, transversas, rarius tan- 

 tum in seriem singulam longitudinalem dispositis; striis transver- 

 sis delicatis, 20-22 in 10 a., punctis carinalibus 8-10 in 10 y.. 



llah. ad insulas Balearicas (Soederlund), ad Caput «Horn» 

 AmericjB australis (Petit). — Frustula panduriformia. An huc Am- 

 phiprora rugosa Petif? 



64. Nltzscliia Amphiprora Grun. in CI. et Gr. Arct. Diat. p. 81, Am- 205^? 

 phiprora nitzschioides Cleve Arct. Diat. 1873!, p. 30, t. 4, f. 18. — 

 Frustulis ex toto 100-160 5 30-34, punctis carinalibus 4-6 in 10 u.., 

 striolas breves (2 y.. longas) efficientibus, mediis remotioribus ; striis 

 transversis delicatis, 22 et uitra in 10 u. 



Hah. in Spetsbergia et Groenlandia, in mari Kariano (Cleve, 

 Grunow). — iSitzschire bilobatce et N. hybridce arcte affinis, ca- 

 rina vero multo raagis centralis. 



Sectio IX. Perrya (Kitton) Grun. [Cl. et Gr. Arct. Diat. 1880, p. 81. Perrtja 

 Kitton [1874] in Micr. Journ. 1874, pag. 218]: Valvae alte convexse, carina 

 subcentrali definita donatae, medio non angustatae. Puncta carinalia strio- 

 las longas vel breves, subinde pluries interruptas et tunc series transver- 

 sas punctorum validorura effingentes elflcientia. 



65. Nitzschia pulcherrima Grun. et Kitton Monthly Micr. Journ. 2059 

 1874, p. 218, t. 81, f. 1-3 (sub Perrj/a). Cl. et Gr. Arct. Diat. 

 pag. 81. — Frustulis e facie connectivali visis linearibus, 220-500 

 =; 34-36, margine ventrali recto vel lenissime concavo, dorsuali 

 recto, apicibus subrotundatis, punctis distantibus, moniliformibus, 

 in series transversas marginem ventralem non attingentes disposi- 

 tis; vaivis angustis, linearibus, apicibus acutis, punctis carinalibus 

 magnis, in lineam centralem longitudinalem moniliformem dispositis. 



Ilah. in « Navy i5ay, Colon, Panama»; in sinu Campechiano. 

 06. Nitzschia antediluviana Pai.t. Foss. I^.acill. Ung. I, p. 41, t. III, f. 32, 206O 



