Bacillariea?, Naviculaceae, LibellUs. 20l 



p. 42, Brachysira Kuetz. [1836] Alg. Dec. n. 153, Lagersf. [1884] 

 Kuetz. Exsikkatverk pag. 61, non Kuetz. oper. poster. — Frustula 

 valvas Navicubie praebentia sed membrana connectivalis longitror- 

 sum pluries plicata costatave (forte diaphragmatum rudimenta?). 

 Obs. Species typica L. Grevillei (Ag.) Cleve. 



1. EULIBELLUS D. T. 



Species aquse marinae incolae. 



Libellus Grevillei (Ag.) Cleve Diat. of Arct. Sea 1873, p. 18, n. 77, ssg 

 Diat. from West Ind. Archip. p. 19, Navicula Libellus Greg. Diat. 

 of Clyde pag. 528, t. 14, f. 101, Navicula Delognei V. H. Syn. 

 p. 110, t. 11, f. 13, Navicula Grevillei Heib. Consp. p. 83, Cleve 

 Diat. Spetsberg. 1864, p. 665, Schizonema Grevillei Ag. Consp. 

 p. 199, Kuetz. Racill. p. 114, t. 5, f. 14, t. 26, fig. 4, V. H. Syn. 

 p. 110, t. 16, f. 2, W. Sm. Br. Diat. III, p. 77, t. 58, f. 364!, Mo- 

 nema comoides Grev. Sc. crypt. Fl. t. 358 (?an 368), Conferva 

 comoides Engl. Bot. t. 1700?, Monemi Grevillei Menegh. in Lin- 

 naea, Bangia quadripunctata Lyngb. Hydrophyt. Dan. t. 26? (ex 

 W. Smith). — Frustulis 30-70=; 15, nonnumquam (verisimiliter 

 in forma sporangiali) 75-110^30; valvis latiuscule lanceolatis, 

 apicibus obtusis; striis transversis valide punctatis, subradiantibus, 

 medio 18-20, ad apices usque 27 in 10 u., rhaphen quasi attin- 

 gentibus; facie connectivali quadrangulari, apicibus rotundatis, me- 

 dio constrictula, longitrorsum numerose striolata. 



Hab. ad oras Danise (Agardh, Heiberg, ?Lyngbye) Finmar- 

 chise, Spetsbergiae (Cleve), ad lapides pr. ins. Helgolandiam (Kuet- 

 zing, Binder), pr. uMorbihan » (Brebisson), ad oras Angliae et Sco- 

 tise (Greville, W. Smith), Neerlandiae (? Rabenhorst), Belgii (We- 

 stendorp, Van Heurck) ; ad uBarbados» (Habirshaw); in niari 

 adriatico (Castracane, De-Toni). 



Libellus rhombicus (Greg.) De-Toni 1. c, N. rhombica Greg. in Micr. 857 

 Journ. III, p. 40, t. III, f. 16, Grun. et Cl. Arct. Diat. p. 43!, Ra- 

 benh. Fl. Eur. Algar. I, pag. 181 (excl. f. latiore) [uon Greg. in 

 M. J. IV, pag. 38, t. 5, f. 1, quse Libellum Grevillei sistit !]. — 

 Valvis rhomboideo-lanceolatis, alte convexis, 70-14-15, ad utrum- 

 que finem acuminatis, apicibus subacutis; striis transversis delicate 

 punctatis, medio paullulo radiantibus, ceterum subparallelis 16-1 C/2 

 in 10 u.., rhaphen crassam attingentibus; nodulo centrali rotundato. 



Hab. ad oras Scotiae, Hiberniae (Gregory), Daniae (Rabenhorst); 

 in salinis ad Tergeste (Grunow). 



