EXPLANATIONS AND REFERENCES, 



PLATE LXXXIV. 



Figures magnified 250 diameters. 



PAGE. 



Figs. 1, 2. OEDOGONIUM STELLATUM, . . 85 



Fig. 3-6. OEDOGONIUM DONNELLII, . 85 



" 7. OEDOGONIUM ECHINOSPERMUM, type-form, . 86 



8. OEDOOONIUM HYSTRIX .... 87 



" 9. OEDOGONIUM HUNTII, . . . 85 



" 10 OEDOGONIUM CILTATUM, . . 84 



