602 Bacillarieae, Surirellaceie, EMagiodiscus. 



Micr. Sc. II, [). 11, T. IV, F. 4, Dovyphora elegann Roper iii Micr. 

 Journ. II, p. 284, F. 3, Podoct/stis americana Bail. N. Sp. p. 11, 

 f. 38, W. Sm. Br. Diat. II, p. 101, Jan. et Rab. Diat. Hondur. 

 p. 11, t. 2, f. 14, Surirella ovalis Menegh. mscr. sec. Kuetzing. 



— Minor, breviter stipitata, frustulis e facie connectivali visis cu- 

 neatis, basi acutiusculis apiceque truncatis, ad 40 '/.. longis; valvis 

 obovatis; striis transversis 4-4^2 in 10 a. 



Hab. ad algas filiformes ex. gr. Cal 1 i t liamn io n , Lyag- 

 byam etc. in mari adriatico et mediterraneo, imprimis prope Ter- 

 geste (IpsK, Meneghini, Hauck, Grunow); prope insulam ((Lesiiia» 

 (BoTTERi); ad (( Capocesto » (Vidovich); ad (( Zara » (Maria de 

 Cattani); ad (cCorfu)) supra Lyngbyam (Liebetruth); in oceano 

 atlantico ad oras Angliae (Roper, W. Smith) et Americae borealis 

 (Bailey). 

 2. Podocystis australica Witt in Journ. Mus. Godeffr. I, 1873, p. 70, 2422 

 t. 8, f. 10, Hedwigia 1«7;3, p. 57 et 125. — Parva, 37-38 ^ 24-25, 

 rotundato-ovata, apice inferiori subproducto, pseudorhaphe striis- 

 que transversis distinctis, interstitiis striarum puncta bene definita 

 ostendentibus. 



Hab. inter Algas marinas prope «Funafuti» Oceani australis. 



— ((An sat distincta a Podoc. adriatica Kuetz. ?)). 



PLAGIODISCUS Grun. et Eulenst. [1867] Diat. auf Sargassum von 

 Honduras in Hedwigia VII, p. 8), (Etyra. plagios obliquus et discus 

 De-Toni Osserv. Tasson. Bacill. 1890, p. 903. — Frustula Suri- 

 raya sed valvae reniforme h. e. cymbelloideae, costis radiantibus. 



Obs. Huic generi verisimiliter adscribendae sunt Suriraya Neu- 

 meyeri Jan., liolepta Ehr., cordata Ehr. 



1. Plagiodiscus nervatus Grun. in Hedwigia VI, 1867, p. 8, M. M. J. 2423 



1877, t. 194, f. 9 a. — Valvis ovato-reniformibus, 30-85 =; 15-50, 

 area levi abbreviata lineari angusta (costam fere referente), costis 

 radiantibus, lineam mediam attingentibus, circ. 2^2-3 in 10 u.. 



Hab. inter Sargassa ex «Honduras i> reportata (Lindig). — Se- 

 ries punctorum efficiunt strias et transversales et longitudinales, 

 has vero tenuissimas, ut in Suriraya Gemma fere 34 in 10 u.. — ■ 

 Var. bacillaris Grun. M. M. J. 1877, t. 194, f. 9 b. 



2. Plagiodiscus Martensianus Gmn. in Hedwigia VI, 1867, p, 8 (nomen), 2424 

 in Micr. M. Journ. 1877, tab. 194, f. 8, Cleve Diat. W. Ind. Archip. 



1878, p. 12. — Valvis ovato-reniformibus, area levi oblongo-ovata 

 aut lanceolata. 



