672 Bacillarieae, Fragilariaceae, Thalassiothrix. 



126. Synedra cuneata Khr. Beitr. 1834, p. 128 (an eadera ac species 

 Grunowii 1867) videtiir Sceptronets. 



127. Synedra biceps Kuetz. videtur Eunoltcu sp. 



THALASSIOTHRIX Cleve et Grun. [1880] Arct. Diat. p. 108 (Etyiu. 

 thalassion mare et tiirioo pilus) em. Castr. [1887] Diat. Challenger 

 p. 54, Notarisia 1889, p. 698, De-Toni Osserv. Tasson. Bacill. 1890, 

 p. 905, Asterionellcc et Si/neclrce sp. auct. — Frustula linearia, ra- 

 diatim per pulvinulum gelineum armilliforme conjuncta, bino ere- 

 ctorum punctulorura ordine instructa; post frustulorura dedupli- 

 cationem armilla disrumpitur et frustula in seriem alternam per 

 isthmum triaugulare coalescunt. 



1. Thalassiothrix Frauenfeldii Grun. in Cl. et Gr. Arct. Diat. p. 109, 2Qm 

 Cl. et Moell. Diat. n. 145, V. H. Syn. t. 37, f. 11-12, Castr. Diat. 

 Challenger p. 54, t. 14, f. 7-8, Asterionella? Frauen feldii Gvnn. 



in Wien. Verhandl. 1863, p. 140, t. 14, f. 18, Asterionella syne- 

 clrceforrnis Grev. in Ann. of nat. Hist. 1865, p. 4, t. 5, f. 5-6. — 

 Frustulis radiatim conjunctis, hinc in catenas alternas dispositis, a 

 latere zonali auguste linearibus;, valvis arctissime linearibus, circ. 

 152 [J: longis (ex icone), utroque margine serie unica punctulorum 

 (spinularum?), 7-9 in 10 y.. evidentium ornatis. 



Ilah. ad insulas Nicobaricas, ad Javam, in mari sinensi et ja- 

 pouico, in mari adriatico , tyrrheno et alibi, in superficie aqu;e 

 vegetans (Grunow, Castracane). — Var, arctica Grun. in V. H. 

 Syn. tab. 37, f. 14 (nomen): punctis marginalibus 7 in 10 \x. In 

 Oceano arctico. — Var. javanica Grun. in V. H. Syn. t. 37, f. 1;] 

 (nomen): punctis marginalibus 12 in 10 u. Ad insulam .Javam. — ■ 

 Var. tenelia Grun. in V. H. Syn. tab. 37, f. 15 (aomen): punctis 

 raarginalibus 13'/g in 10 [x. In Oceano arctico. 



2. Thaiassiothrix longissima Cleve et Grun. Arct. Diat. 1880, p. 108, 2fi70 

 Cl. et Moell. Diat. n. 125, Synedra Thalassiothrix Cleve Arct. 

 Diat. 1873, p. 22, t. 4, f. 24, Cl. et Moell. Diat. n. 14, H. L. Sm. 



Sp. T. n. 584. — Valvis raaxime elongatis, 3-4 ram. longis, 40-42 

 a, latis, 90-100-pIo longioribus quam latioribus, apicibus subrotun- 

 datis; striis tenuibus, fere 12 in 10 y., 



Tlab. ad superficiem maris arctici borealis, copiose (Cleve) ; 

 intra Salpam in portu messauense (Castracane); — Var, antar- 

 Ctica Cl, et Gr, in V. H, vSyn. t, 37, fig. 10 (nomen). In mari po- 

 lari australi. 



3. Thalassiothrix nitzschioldes Grun. in V. H. Syn. t, 43, f. 7, Sy- 267i 



