520 Bacillariefe, Nitzschiacefe, Nitzschia. 



V. H. Syu. t. 60, f. ]4-15, Pritchardia scalaris Rabenh. Fl. Eur. 

 Algar. I, pag. 162 (b. major), Synedra scalaris Ehrenb. Verbr. 

 p. 137, t. 2, 11, f. 18 ex parte. — Valvis iate linearibus, ad 480 

 u.. longis, 20-24 a. latis, utroque flne conico attenuatis, costis trans- 

 versis longioribusque 3-5 in y.., striis transversis anguste puncta- 

 tis, 9-11 in 10 y. ; frustulis sectionem transversam subquadrati- 

 cam vel oblongo-rectangularem prsebentibus. 



Hab. in aquis submarinis Angli?e (W. Smith), GalliiB ad « Cher- 

 bourg» (De Brebisson). Daniai (Heiberg), in fundo maris Adria- 

 tici (Grunow), in Gelidio corneo ad rupes Tagi salsi pr. « Por- 

 to Brandao)) (D. GoMESi, in Gelidio corneo prope «Biarrits» 

 (Endress); pr^eterea inCorallina Cuvierii prope «PortPhi- 

 lip» Australiffi (F. Mueller). - Var. minor Grun. 1. c. pag. 83; 

 valvis 150-250 ^ 13-14, apicibus vix ampliatis, costis 4-5 in 10 u. ; 

 striis transversis l^i/s-lS in 10 a. In lacunis insularura Naviga- 

 torum (Samoa) et in «Delaware» (Grunow). 



sectio XIII. Insignes Grun. [in Cl. et Gr. Arct. Diat. 1880, p. 83]: Sectioni 

 prfecedenti similis, carina adhuc magis centrali. Frustuia subinde oranino 

 leviter sigmoideo-ineurvata. 



Obs. Ad sectionem 1'erryam vergit. 



77. Nitzschia grandis ICitton in Monthly Micr. Journ. XVII, p. 218, 207i 

 t. 82, f. 5-6, Cl. et Grun. Arct. Diat. p. 83. — Valvis linearibus, 

 230-500 ^ 40, apicibus incurvis et acutis, carina subcentrali, costis 

 3-4 in 10 ;j.., seriebus punctorum inter costas 8-10 in 10 p. ; fru- 

 stulis linearibus, apicibus rotundatis. 



Eab. ad « Navy Bay, Colon, Panama)) (Kitton). — Habitus 

 Nifzschiw Brighhoellii Kitton. 



78. Nitzschia Gruendleri Grun. in Cleve Diat. West Ind. Archip. 2072 

 p. 14, t. 4, f. 24, Cl. et Gr. Arct. Diat. p. 83, Journ. Quek. Micr. 



Cl. 1887, p. 73. — Habitus fere Nitzschicv Weissflogii, valvis 

 210-270 [X. longis, medio non constrictis at rectis, carina excen- 

 trica; striis transversis parallelis, punctatis, 11-13 in 10 a., costis 

 carinalibus 3-4 in 10 u.. 



Hab. in sinu Campechiano (Gruendler), in Florida (Grunow), 

 inter «Aden» et « Ba!)-el-Mandeb » (Cleve); in depositu ad «Oa- 

 maru » Novso Zelandiffi (Grove). 



79. Nitzschia scaligera Grnn. in Cl. et Gr. Arct. Diat. p. 83, J. R. 2073 

 M. S. 1880, p. 395, t. 12, f. 3. — Valvis linearibus, 108^1I,sen- 

 sim apices versus attenuatis, apicibus productis et iiitrorsum sub- 



