Bticillariea), Fragilariacea", Ardissonia. 67;i 



nedra nilzscJiioides Grun. in Wion. Verhandl. 1862, p. 403, t. 5, 

 f. 18, k\^. Novara p. 95, t. I /1, f. 7 (var. minuta), V. H. Syn. 

 p, 153, t. 43, f. 7-10. — Frustulis e facie connectivali visis api- 

 ces versus leniter attenuatis, 60-00 a, longis, in formis uiinoribus 

 20-40 a. longis, valvis lineari-lanceolatis, 20-40-70 a. longis, raro 

 subcuneatis, apicibus vix productis, punctis marginalibus 7-8I/2 i" 

 10 a., in formis minoribus circiter 12 in 10 y.. 



Ilab. in mari pacilico boreali inter algas varias; ad Macro- 

 cyslideni piriferam ex oris Peruvise; ad algas marinas prope 

 «Valparaiso» Bi'asili3e lectas (Grunow); ad « Blankenberghe » 

 Belgii (Van Heurck). — Var. acumlnata Grun in Pant. Foss. Ba- 

 cill. Uugarns I, p. 36, t. XXVI, f. 246: valvis aaguste lanceolatis, 

 110-130 c; 10-11, polos subproductos versus angustatis; punctis mar- 

 ginalibus 14 in 10 ^. ; punctis minutis perpaucis hinc mde in me- 

 dia valvae parte obviis. Fossilis ad «Szent-P6ter, Kekko » in Hua- 

 garia. 



4. Thalassiothrix curvata Castrac. Diat. Challenger p. 55, t. 24, f. 6, 2672 

 Notarisia 1889, p. 698. — Frustulis liuearibus, subcurvatis, cras- 

 siusculis, circ. ^^ a. longis (ex icone), radiatira vel alterne pulvi- 

 nulo conjunctis; punctulis frustulorum marginalibus duplo quam in 

 Thalassiotrice Frauenfeldii rarioribus. 



Hab. in mari Japonico (Exped. Challenger). 



5. Thalassiothrlx elongata Grun. in V. H. Syn. t. 37, f. 9 (nomen). 2073 



Hab. ad insulam Javam. — Frustula (ex icone) 90 a. longa. 



6. Thalassiothrix? marina Grun. in V. H. Syn. t. 37, f. 8 (nomen). ^674 



Hab. in sinu «Lambash» Scotiffi. — « An Opephora?». 



ARDISSONIA De Not. [1870] in Erb. Critt. ital. II ser., n. 334 et N. 

 Giorn. bot. ital. 1871, p. 95 (Etym. a cl. phycologo italico Fran- 

 cisco Ardissone), Cl. et Gr. Arct. Diat. 1880, p. 108, Sijnedra 

 sectio Grallatoria Grun. in Wiea. Verhandl. 1862, pag. 388. — 

 1'rustula Synedrce, valvis plicis seu lineis 2 vel ultra margini ap- 

 proximatis parallelisque percursis. 



Obs. Frustula plerumque stipitata. Species hucusque descriptoe 

 omnes maris incolse (2 tantum fossiles). 



1. Ardissonia crystallina (Ag.) Gruu. in Cl. et Grun. Arct. Diat. p. 108, j,^,,- 

 V. H. Syn. t. 42, f. 10, Synedra crysiallina Kuetz. Bac. p. 69, 

 t. 16, f. I, W. Br. Sm. Diat. I, p. 74, t. XII, f. 101, Rabenh. Fl. 

 Eur. Algar. I, p. 139, V. H. Syn. p. 153, Biatoma crystallinum 

 Ag. Consp. p. 52. — Valvis valde elongatis, angustissimis, 450-500 



