368 G. C. KAROP ON STAURONEIS LEGUMEN. 



of the latter. There has been no time to clean the material 

 from Newark or to make a drawing of the specimens on Dr. 

 Edwards' slides. 



Explanation of Figures, Plate XVIII. 



Fig. 1. Pleurostauron {Stauroneis) (Staurojotera) legumen, 



Ehr. After Ehrenberg, loc. cit., and Kiitzing, Die 



Bacillarien. 

 „ 2. Pleurostauron (Stauroneis) linearis^ Ehr. (= St. 



Smithii, Grnn.). After Ehrenberg, loc. cit., and 



Kiitzing, Die Bacillarien. 

 „ 3. Pleurostauron (Stauroneis) legumen. After Van 



Heurck. Diat. d. Belgiqne. 

 „ 4. Pleurostauron (Stauroneis) legumen, " aberrant 



variety." After F. W. Lewis, loc. cit. = St. obtusa, 



Lagers. 

 „ 5. Pleurostauron (Stauroneis) linearis. River Lea, 



drawn with 4 mm. Apo, Zeiss; Comp. Ocular 12. 

 „ 6. Pleurostauron (Stauroneis) legumen. After Brun. 



Diat. d. Alpes, Plate VIIL, Fig. 26. 

 ,, 7. Pleurostauron (Stauroneis) legumen. After W.Gregory. 



Quart. Jour. Mic. Sci., Vol. IV., Plate I., Fig. 9^ 



1856. 



