Bacillarieae, Cocconeidacese, Cocconeis. 457 



sigmoideis, rhaphe manifesto notata, parum sigmoidea; striis te- 

 nerrimis, punctatis, 15 in 10 u., subdecussatis. 



Hab. in flumine « Pissa » pr. « Johannisburg » in Masovia (Schu- 

 mann). — «An revera hujus sectionis?». 



E. Valva superior utrinque area arcuata levi, saepe plicffiformi donata, pli- 

 culis longitudinalibus etiam exarata. 



52. Cocconeis pseudomarginata Greg. Diat. of the Clyde p. 20, t. 1, i 851 

 f. 27, Pritch. Infus. pag. 871, t. 7, f. 39 (male), Jan. et Rabenli. 

 Hondur. p. 7, t. 1, f. 16, Sm. Sp. T. n. 74, Rab. Fl. Eur. Algar. 



I, p. 104, Cl. Voga p. 460, V. H. Syn. t. 29, f. 20-21, Cocconeis pel- 

 lucida Grun. in Wien. Verhandl. 1863, p. 9, t. 13, f. 6 non in 

 Hantzsch Beitr. I, t. 6, f. 11, nec Alg. Novara p. 12, Cocconeis 

 major Greg. Diat. of the Clyde pag. 21, t. I, f. 28, Sm. Sp. T. 

 n. 74, Rabenh. Fl. Eur. Algar. I, p. 101. — Valvis late ellipticis, 

 colore fulvesceuti, 40-100 u. longis, valva inferiori hyalina, striis 

 tenuibus, subradiantibus, 14-20 in 10 u., rhaphe recta, abbreviata, 

 nodulo centrali rotundato, valva superiori utrinque area levi an- 

 guste lineari-lanceolata, arcuata nec non lineis longitudinalibus, 

 (enuioribus, paucis extra et infra sulcum sitis instructa, area me- 

 <lia anguste lanceolata, nodulis terrninalibus et eentrali conspicuis, 

 striis transversis 20-24 in 10 u. 



Hab. in mari mediterraneo et adriatico (Grunow, Castracane); 

 ad littora Italise et Siciliae; ad «Gibraltar» (Exped. Novara) ; ad 

 oras Scotiae, Hiberniae (Gregory), Gallise (Brebisson), Lusitanise 

 (Rabenhorst). — Var. intermedia Grun. Alg. Novara p. 13, t. I. 

 f. 6, a (valva superior), b (valva inferior), Cocconeis Kirchenpa- 

 ueriana Rab. et Jan. Diat. Honduras tab. I, fig. 91: minor, te- 

 nuius striata, valva superiori dilute lutescente, linea raedia hiuc 

 inde sigmatoidea. Ad algas imprimis Sargassa marium calidio- 

 rum; ad Caput Bonae Spei, ins. Nicobaricas, «Luzon, Manilla, Ta- 

 hiti » (Exped. Novara) ; % ad « Honduras » (Janisch et Rabenhorst). 

 — Forte huc pertinet Cocconeis iceniala in Ehrenb. Mikrogeol. VI, 



II, 12 a [ex Morea). 



"):». Cocconeis ambigua Grun. Alg. Novara p. 14, t. I, f. 9 (valva 1852 

 superior?), V. H. Syn. t. 30, f. 8-10. — Valva s-iperiori (?) utrin- 

 que area lineari lanceolata incurva levi instructa, margine evi- 

 denter transverse striata, striis subradiantibus, 16 in 10 a., valvae 

 parte interiore longitudinaliter et transverse striata, striis longi- 



