Bacillarieoe, Fragilariacea^ Rliaphoneis. 701 



Var. amazonica Grun. in Pant. I. c. p. 35, t. XXVll, f. 260: valvis 

 rhoinbicis, 42:^19, pseudorhaphe angusta, punctis in lineas trans- 

 versales subradiantes, 8-9 in 10 ;->.. et longitudinales ordinatis, po- 

 los versus minoribus. In ostiis fluminis «Maranhon, Araazones » in 

 Araerica australi. — Var. dubia Grun. Alg. Novara p. 99, t. 1 A, 

 f. 6: valvis late ovato-hmceolatis, polis parura productis obtusiu- 

 sculis, pseudorhaphe angusta, in media parte parura arapliata, pseu- 

 donodulo obsoleto, plerumque segre conspicuo ; striis punctatis, ra- 

 diantibus, 9 io 10 pt., punctis minutis confluentibus. Inter sabu- 

 lam ad radices Eckloniae buccinalis ad S. Paulum maris au- 

 stralis. 



5. Rhaphoneis fluminensis Grun. in Wien. Verhandl. 1862, pag. 382, 28i5 

 t. VII, f. 30, Rabenh. FI. Eur. Algar. I, p. 125. — Major ; valvis 

 late ovatis, 68-72 ::; 42-70 ; striis punctatis, radiantibus, SVg-^Vo in 



10 V.., lineis 2, rarius 4 interruptis, area levi lineari-oblonga. 

 Hab. in fundo raaris adriatici (Lorbnz). 



6. Rhaphoneis mediterranea Grun. in Wien. Verhandl. 1862, p. 382, 28i6 

 t. 7, f. 7, Rabenh. Fl. Eur. Algar. I, p. 125. — Major; valvis late 

 ovatis, 65 w 42-44; striis non punctatis, radiantibus, validis, 3-3^2 



iu 10 [j.., lineis 2 longitudinalibus crenulatis, area levi anguste li- 

 neari-lanceolata apices attingente. 



Hab. mter algas ad litora insulse Corsicse, rarissime (Grunow). 



7. Rhaphoneis? quarnerensis Grun. in Wien. Verhandl. 1862, p. 381, 2817 

 t. 7, f. 24 a, c (et bf). — E minoribus, valvis late ovato-Ianceo- 

 latis, 20-30^ 12-16, apicibus obtusis; striis brevibus, marginalibus, 

 7'/2-8Vo iii 10 u.., area media irregulariter et subtiliter puuctata, 

 late lanceolata. 



Hab. in fundo maris adriatici (Lorenz). — Forte eadem spe- 

 cies occurrit ad «Labuan» insul;o Bornei, teste Cleve Diat. Vega 

 p. 500, t. 37, f, 53 sed specimina Borneensia pseudonodulum osten- 

 dunt et forte Glyphodesmatis speciem sistunt. 



8. Rhaphoneis Lorenziana Grun. in Wien. Verhandl. 1862, p. 381, 28I8 

 t 7, f. 5. — Valvis late ovato-Ianceolatis, 30-50 « 18-22, apicibus 

 parum productis, acutiusculis ; striis radiantibus, validis, 5 in 10 u.., 

 area levi lanceolata. 



Hab. in fundo maris adriatici, rarissime (LoRENz). — An Di- 

 merograniina ?. 



9. Rhaphoneis scutelloides Grun. in Wien. Verhandl. 1862, p. 383, 2819 

 t, 7, f. 34. — Minor; valvis ovatis vel late rhorabeo-lanceolatis, 

 15-30 c; 10-16, apicibus obtusis; striis indistincte punctatis, subra- 



