Bacillariese, Naviculaceae, Schizostauron. 225 



gatis, sub angulo lato distantibus, recurvis (cum margine fere pa- 

 rallelis); striis transversis tenuissimis. 



Hab. ad Sargassa ex «Honduras» reportata (Lindig). 



2. Schizostauron Reichardtianum Grun. in Hedwigia 1867, p. 28, M. 977 

 M. J. 1877, t. 195, f. 18. — Valvis late lanceolatis, apicibus paullo 

 productis, obtusis, rhaplie recta, utrinque non dilatata, nodulo cen- 

 trali furcato, ramis brevibus; striis transversis 9 in 10 u. 



Hab. ad insulas quarnerenses maris adriatici (Doct. REICHARDT). 



3. Schizostauron ovatum Grun. in Hedwigia 1867, p. 28. — Magnitu- 978 

 dine et forma Schizostauro Lindigiano simile, rhaphe leniter 

 sigmoidea, utrinque non dilatata, nodulo centrali lineari, ramis bre- 

 vibus; striis transversis delicatissimis, circiter 24 in 10 u., sub- 

 parallelis. 



Hab. ad insulas quarnerenses maris adriatici (Doct. Reichardt). 



4. Schizostauron? fimbriatum Grun. in Hedwigia 1867, p. 28. — 979 

 Valvis fere rhomboideis, apicibus obtusis, rhaphe recta, medio paullo 

 dilatata, nodulo centrali fimbriato-ramoso ; striis transversis radian- 

 tibus, circiter 24 in 10 y.. 



Hab. ad insulas quarnerenses maris adriatici (Doct. Reichardt). 



B. Species aquse dulcis incolse. 



5. Schizostauron Crucicula Grun. in Cleve On some new or litte 980 

 known Diatoms p. 16, t. III, f. 44. — Valvis subellipticis, apicibus 

 capitatis, 30^9, nodulo centrali .'taurum bifidura, ramis valide di- 

 vergentibus marginemque attingentibus prabente; striis obliquis 

 subtilibus, 25 in 10 y.. 



Hab. ad Charam in fl. «Merriraac River» dicto in America 

 fcederata, rarissime (Nordstedt). 

 6 Schizostauron verbanium (De Not.) De Toni, Stauroneis verbania 98i 

 De Not. in Erb. Critt. ital. n. 1434, Hedw. II, p. 71, N. Giorn. 

 Bot. ital. 1871, p. 322. — Valvis lineari-oblongatis, infra apices 

 rotundatos nonnihil contractis exindeque ventre leniter tumescen- 

 tibus, centro area quadrangula ad angulos literae X ad instar pro- 

 ducta, rhaphe diaphana; striis transversis tenuissimis, granulatis, 

 24 in 10 *., radiantibus ; frustulis e facie connectivali visis rectan- 

 gularibus. 



Hab. in volutabris ad litus lacus Verbaniensis ad «Intra» pro- 

 pe ostium « S. Bernardino », sociis Cymbelld lanceolatd, C. helve- 

 iicd, Stauroneide amphicephald, Naviculd limosd etc. (De No- 

 taris). 



15 



