' 



224 Bacillariere, Naviculacese, Schizostauron. 



6. Pleurostauron javanicum Gruu. Alg. Novara p. 21, t. 1, f. 14, C. 973 

 et M. Diat. n. 99. — Valvis 140-150 » 25, lanceolatis, apice obtu- 

 siusculis, fascia transversa sublata, marginem versus vix ampliata; 

 striis transversis punctatis, 12-13 in 10 u. 



Hab. fossile in terra eduli Javae (Frauenpeld). — Pleuro- 

 slauro Legumini Rabenh. simile, forte tantura varietas Pleuro- 

 stauri acuti. 



7. Pleurostauron Sagitta (Cl.) Grun. in Cl. et Moll. Diat. n. 261, 974 

 Cleve On some new or little known Diat. p. 15, t. 3, f. 45 (Slaur. 

 Sagilta). — Valvis elongatis, 30-40 s6-10, apiculatis, habitu Pleu- 

 rost. Leguminis, apicibus diaphragmatibus interioribus brevibus 

 donatis; striis obliquis, 21 in 10 u., raedio 1-2 validioribus. 



Hab. in aquis dulcibus in ostio uTana Elf» Finmarchise (T. 

 M. Fries). 



8. Pleurostauron scaphulaeformis (Grev.) Grun. in C. et M. Diat. n. 276, ™ 

 Stauroneis scaphulceformis Grev. in Trans. Micr. Soc. 1866, p. 85, 



t. 9, fig. 32, Linds. in Journ. Linn. Soc. Bot. IX, p. 134 (nomen). 

 — Parvum, valvis linearibus, 90 fx. longis, lanceolatis, ad apices sub- 

 acutos paullo contractis productisque, apicibus margine incrassato 

 cinctis; stauro amplo, dilatato, margines attingente. 



Hab. iu aquis dulcibus ad «Otago» Novse Zelandiae (Lauder 

 Lindsay). — A Pleurostauro Legumine (Ehr.) differt stauro am- 

 plo dilatato, valvis apice constrictis. 



Species mihi tantum nomine notae. 



9. Pleurostauron Janischii Hilse Beitr. Alg. Schles. 1860, p. 88. 



10. Pleurostauron tumidulum Grun. in Cl. et M6U. Diat. u. 261. 



11. Pleurostauron Smithii Grun. in 01. et Moll. Diat. n. 242. 



SCHJZ0STAUR0N Grun. [1867] in Hedwigia 1867, pag. 28 (Etym. 

 schizo. findo et stauron, crux), De-Toni Osserv. tasson. Bacill. 

 [1890] p. 896. — Frustula naviculacea, valvis ovatis vel lanceo- 

 latis, nodulo centrali transversim dilatato lineari, utroque fine bi- 

 fido (v. laciniato-fimbriatol). Rhaphe subrecta obsoleteve sigmoidea. 



A. Species aquae marinse incola^. 



1. Schizostauron Lindigianum Grun. in Hedwigia 1867, p. 28, M. M. J. 976 



1877, t. 195, f. 17. — Valvis late ovalibus, 28 » 20, rhaphe obso- 

 lete sigmoidea, utrinque inter polos et nodulum centralem dilatata 

 sublanceolata, nodulo centrali utroque fine bifurcato, rarais elon- 



