Bacillariea^, Cocconeidacea?, Campyloneis. 439 



siusculis; facie connectivali frustulorum cuneata plus minus fracta; 

 stipite plus minus elongato,- striis transversis 12-13 in 10 p. 

 Rab. in plantis aquaticis ad «Moritzburg» Saxonine (Rabbnhorst). 



Huc accedere mihi videtur : 

 Gomphonema? asymmeiricum Gutw. 



Familia V. Cocconeidaceee (Kuetz.) Grun. 



Cocconeidacece Kuetz. [1844] Bacill. p. 70, ampl. Grun. [1868] Alg. Novara 

 p. 8, De-Toni [1890] Osserv. Tasson. Bacill. p. 899. 



Valvse secus axin et longitudinalem et transversalem symmetricse, 

 rhaphe *) recta et nodulo centrali instructse, nodulis terminalibus 

 pleruraque carentes. Latera connectivalia secus axin transversalera 

 symmetrica. Cellulae (frustula) plus minus incurv;e ita ut rhaphe valvse 

 summum occupat. 



Phaeophora laminaeformia, singula, valvse superiori adposita. 



Conspectus Generum 



A. Frustula e facie connectivali arcuata. 



Campyloneis Grun. — Valvae heterogeneae, inferior costata, superior iusigniter 



cribroso-punctata, nodulis nullis. 

 Cocconeis (Ehr.) Grun. — Valvae dissimiles, utraque granulata vel striata, 



inferior noduligera et rhaphe instructa. 



B. Frustula e facie connectivali visa recta. 



Orthoneis Grun. — Valvae conformes, corona marginali costarum brevium, 



rarius laminarum hemisphaericarum donatse. 

 Anorthoneis Gruu. — Valvae conformes, sine corona costarum, rhaphe ex- 



centrica. 



CAMPYLONEIS Grun. [1862] in Wien. Verhandl. XII, p. 429, Alg. 

 Novara pag. 10 (Etym. campylos arcuatus), V. H. Syn. pag. 133, 

 De-Toni Osserv. Tasson. Bacill. p. 899. — Valvse heterogene:e, 

 inferior costata, superior insigniter cribroso-punctata, nodulis 

 nullis. — Frustula scutelliformia, transverse arcuata, adnata. 



1. Campyloneis Grevillei (W. Sm.) Grun. et Eul. Alg. Novara 1868, 1795 

 p. 10, 98 (var. Grevillei\), J. R. M. S. 1878, p. 245, t. XIV, f. 5, 



*) Rhaphe genuina in una (inferiori) valvarum, in altera (superiori) vero 

 pseudorhaphe adest. 



