Smith—Monograph of Scenedesmus. 
529 
DESCRIPTION OF FIGURES IN PLATES I TO XIX. 
Figures 1-56 are redrawn from the original illustrations of the various 
authors. Figures 57 and 58 from material collected in the field. All others 
from material from pure cultures. All of the original figures were drawn with 
the aid of the Abbe camera lucida, the drawing being made at the level of the 
base of the microscope, and with the aid of the Leitz oil immersion objective 
A and ocular 4 (except in figures 186-195 where ocular 1 was used). The 
drawings are reduced 3^ in reproduction so that the magnification is about 
1000 diameters with the 4 ocular and 500 diameters with the 1 ocular. 
plate xxv 
Fig. 1. S. oahuensis. After Lemmermann 1905A. 
Fig. 2. S. bijuga. (As Achnanthes octalterna.) After Turpin 1828. 
Figs. 3-5. S. acuminatus. After Lagerheim 1883. 
Fig. 6. S. Bernardii. (As S. obliquus forma magnus.) After Bernard 1908. 
Fig. 7. S. obliquus. (As Achnanthes obliqua.) After Turpin 1828. 
Fig. 8. S. dimorphus. (As Achnanthes dimorpha). After Turpin 1828. 
Figs. 9-10. S. incrassatulus. After Bohlin 1897. 
Fig. 11. S. producto-capitatus. After Schmula 1910. 
Fig. 12. S. bijuga. (As Achnanthes bijuga). After Turpin 1828. 
Fig. 13. S. bijuga. (As Achnanthes quadrijuga.) After Turpin 1828. 
Figs. 14-15. S. bijuga var. alternans. (As S. alternans.) After Reinsch 1867. 
Fig. 16. S. bijuga var. flexosus. After Lemmermann 1898A. 
PLATE XXVI 
Figs. 17-16. S. curvatus. After Bohlin 1897. 
Figs. 19-20. S. arcuatus. After Lemmermann 1899. 
Fig. 22. S. aculeolatus. After Reinsch 1877. 
Fig. 23. S. denticulatus. After Lagerheim 1883. 
Fig. 24. S. denticulatus var. lunatus. After West and West 1895. 
Fig. 25. S. carinatus. (As S. opoelinsis var. carinatus.) After Lemmermann 
1899. 
Figs. 26-27. S. costatus. After Schmidle 1895. 
Figs. 28-29. S. acutiformis. After Schroder 1897C. 
Figs. 30-31. S. brasiliensis. Fig. 30 after Bohlin 1897; Fig. 31 after West 
and West 1902. 
Fig. 32. S. insignis. After West and West 1895. 
Fig. 33. S. granulatus . After West and West 1897B. 
Fig. 34. S. ornatus. (As S. quadricauda var. ornatus.) After Lemmermann 
1910A. 
Fig. 35. S. hystrix. After Lagerheim 1883. 
Fig. 36. S. longus var. apiculatus. (As S. alternans var, apiculatus.) After 
West and West 1894. 
Fig. 38. S. bijugatus var. granulatus. (After Schmidle 1903.) 
PLATE XXVII 
Fig. 39. S. quadricauda. (As Achnanthes quadricauda.) After Turpin 1828. 
Fig. 40. S. quadricauda var. maximum. After West and West 1895. 
Fig. 41. S. longus var. dispar. (As S. dispar.) After de Brebisson 1856. 
Fig. 42. S. quadricauda var. longispina. (As S. longispina.) After Ghodat 
191 3. 
Fig. 43. S. quadricauda var. quadrispina. (As S. quadrispina.) After Ghodat 
1913. 
Fig. 44. S. longus var. ellipticus. (As S. quadricauda var. ellipticum.) 
After West and West 1895. 
Figs. 45-46. S. abundans var. asymmetrica. (As S. quadricauda var. asym¬ 
metric a.) After Schroder 1897G. 
