Bacilhirieae, Surirellacean, Campylodiscus. 633 



Spocies Campylodisci quas ad genus Surirmjain pertinet, quia pseudorha- 

 phibus utriusquc valvte paralloliter dispositi sunt etsi valva3 tortaj sint 

 (Est Pseudosuriraya sed vix sensu Grunowii). 



1. Suriraya spiralis Kuetz. Bacill. pag. 60, t. 3, f. 64, V. H. Syii. 2537 

 p. 189, t. 74, f. 4-7, Campiflodiscus spiralis W. Sm. Br. Diat. I, 

 p. 29. t. 7, f. 54, Bleisch in Hedwigia H, p. 32, t. 5, f. 11-16, 

 Rabenli. Fl, Eur. Algar. I, p. 50, Surirella flexuosa Eiir. Verljr. 

 p. 136, t, 3 I, f. 20, Surirella contorta Breb. mscr. teste Kuet- 

 'iing. — Valvis elliptico-lanceolatis. circa axin longitudinalem tor- 

 tis, 100-160 [J: longis, costis robustis, 2-3 in 10 ,a., pseudorhaphen 

 subattingeritibus ; striis subtilibus, circiter 26-28 in 10 u.., hinc 

 inde (prrecipue secus longitudinem costarum) punctis crassis sparsis 

 prseditis; frustulis numeri 8 ad instar tortis, zona connectivali am- 

 pliuscula, evidenter alata, pseudorhaphibus parallelis superposi- 

 tisque. 



Hab. in fossis et pratis scaturiginosis, paludibus turfosis, fodiuis 

 argillaceis, e planitie usque in r gionem alpinara, sa^pius in con- 

 sortio Campylodisci norici, Cymbellce alpince etc. in pluribus 

 locis Austrife (Heufler, Sauter, Mildb, Haussmann, Moerl), Mo- 

 ravise (Nave), Silesise (Bleisch, Hilse), Thuringiae (Kuetzing). 

 Galliae (De Brebisson, Desmazieres), Anglise (Capron, W. Smith, 

 Brightwell, Norman); in Galicia (Gutwinski), montibus tatricis 

 (Schumann), Italia (De-Toni). 



Familia X. Diatomaceae (Grun.) Kirchn. 



Diafomacece Grun. [1862] in Wien. Verliaiuli. p. 318 ex parte, Kirchn. [1878] 

 Alg. Schles. p. 203, De-Toni [1890] Osserv. Tasson. Bacill. p. 903. 



Valvje (latera valvarum) et zonae connectivales secus axin et lon- 

 gitudinalem et transversalem symmetric?e; valvse plante, carina et alis 

 destitutse, costis transversis conspicuis plerumque validis, haud inter- 

 ruptis vel cingulo longitudinali levi interruptis instructae, pseudo- 

 rhaphe sine nodulis centrali terminalibusque donatse. 



Phseophora granuliformia, numerosa ; (Auxosporse ignotae), 



Conspectus Generum 



Dialoma (DC.) Heib. — Cost» medio non interruptse. Frustula plerumque in 

 fascias zig-zag ad instar (raro planas) conjuncta. 



