Diamond, [52].

Diatomaceæ, fossil, [88], [93].

---------- recent, [91].

---------- the food of mollusks, &c., [99].

Dibrachiata, [449], [450].

Dichobune, [791].

Dichodon, [791].

Dicotyledonous plant-remains of the Chalk-formation, [215].

-------------- trees, fossil, [203].