550 Baeillariese, Nitzschiacese, Nitzsehia. 



chice Sigmce; punctis carinalibus 5-7 in 10 pt., duobus mediis vix 

 ceteris remotioribus; striis transversis distincte punctatis, raedio 

 13y2, ad apices 18-20 in 10 a. Ad S. Bartholomseum. — Var. ?in- 

 curva Grun. loc. cit. Nitzschia incurva Grun. Kasp. Alg. p. 120, 

 V. H. Syn. t. 70, f. 13-14: parva; valvis 50-60 ^; 4,5, ssepe illam 

 positionem suraentibus ut omnino recta3 adpareant ; punctis carina- 

 libus 6-7 in 10 p.., striis trausversis mediis l^V^» ad apices 18-20 

 in 10 ^. Inter Oscillarias ad palos portus Ostendae Belgii (Gru- 

 Now). — Var. incerta Grun. 1. c, Nitzschia reversa var. major 

 Grun. in Wien. Verhandl. 1862, p. 582, t. 12, f. 4 vix Nitzschia 

 reversa W. Sra. [Cfr. Nitzschia rostrata var. reversa]: punctis 

 carinalibus vix raanifestis vel oranino absentibus, valvis ut in typo, 

 130-185^5,5, apicibus vero tenuioribus et acutius a corpore dis- 

 cretis, striis transversis n^ediis 12^^-14^2 iu 10 [j.., apices versus 

 confertioribus. In fundo raaris adriatici (LoRENz); in sinu Campe- 

 chiano (Grunow). 



157. Nltzschia rostrata Grun. in CI. et Gr. Arct. Diat. pag. 101, 2151 

 Nitzschiella reversa Rabenh. Fl. Eur. Algar. I, p. 164 excl. var. 

 majore, Nitzschia reversa W. Sra. Br. Diat. I, p. 43, t. 15, f. 121, 

 Ceratoneis reversa Pritch. Inf. p. 783, Nitzschia Closterium Eul, 

 Typ. n. 27, I editionis [non II editionis], — Nitzschioe longissimce 

 var. Closterio sirailis, cornibus partim rectis partira unilateraliter 

 incurvis, valvis 60-140:^4-9, punctis carinalibus obsoletis, striis 

 transversis 20-26 in 10 a. 



Hab. in aquis submarinis Angliae (W. Smith), Gallise (Bre- 

 BISSON), Frisise (T. Spree), Danise (Heiberg). 



158. Nitzschia hamata (W. Sra.) Rabenh. Fl. Eur. Algar. I, p. 164 2152 

 (sub Nitzschiella), Synedra hamata W. Sra. Br. Diat. I, p. 73, 



t. XXX, fig. 264 (striis perviis delineatis), Pritch. Inf. p. 786. — 

 Linearis vel lineari-lanceolata, 50-100 [).. longa, polos versus con- 

 stricta, apicibus longe porrectis rostriformibus incurvis; striis raar- 

 ginalibus, 11 in 10 p.. 



Eah. prope «Sussex» AngliL« (W. Smith); «Vallee de Menton» 

 Galliffi (Boettcher). 



159. Nitzschia spiralis (Kuetz.) Rabeah. FI. Eur. Algar. I, pag. 165 2153 

 (sub Nitz&chiella), Ceratoneis spiralis Kuetz. Bacill. p. 104, t. IV, 



f. 38. Pritch. Inf. pag. 783, t. XIII, f. 3. -^ Anguste lanceolata, 

 105-119 p.. longa, cornibus planis spiralibus, obtusiusculis. 



Hab. ad litora maris borealis, in sinu Codano, in sinu Curo- 

 nensi (Klinsmann). 



