362 Mot tier . — - On Certain Plastids, with Special Reference to 
granules arising in the same manner occur also in cells beneath the aleurone 
layer. These seem to be more numerous in swee't corn. 
The protein granules in Ricinus arise also from pre-existing granular 
or rod-shaped primordia. They aggregate in large numbers in vacuole-like 
cavities, and their combined products unite in these cavities to form the 
large aleurone grains of the mature seed. As the seed matures a part 
of the protein, at least, forms the crystalloid or crystalloids near which the 
globoid arises. There was nothing in this study to indicate that a globoid 
was a centre for the formation of the aleurone granule as claimed by 
Pfeffer. 
The protein bodies in the parasite Conopholis arise from primordia 
in the same manner as in the endosperm of Zea. 
It is possible that the oil in the seeds of Ricinus owes its origin to oil 
plastids. The author is not able at the present writing to speak with 
full assurance on this point. He is of the opinion that drops of oil and 
fat in the cytoplasm are the synthetic products of oil plastids. 
Literature cited. 
1. Beer, R. (1909) : On Elaioplasts. Ann. Bot., vol. xxiii, pp. 63-72. 
2. Emberger, L. (1920) : Evolution du chondriome chez les cryptogames vasculaires. Comptes 
rendus, tom. clxx, p. 282. 
3. — : Evolution du chondriome dans la formation du sporange chez les 
fougeres. Ibid., p, 469. i 
4. Gris, A. (1864) : Ann. d. Sci. Nat., Bot., 5 e ser., tom. xi. 
5. Groom, P. (1893) : The Aleurone Layer of the Seeds of Grasses. Ann. Bot., vol. vii, pp. 387-92. 
6. Guilliermond, A. (1919) : Sur l’origine mitochondriale des plastides a propos d’un travail de 
M. Mottier. Ann. d. Sci. Nat., Bot., io e s£r., tom. i, pp. 225-46. 
7. — ^ — . ... ■ . . . Observations vitales sur le chondriome des vegetaux et recherches 
sur l’origine des chromoplastides et le mode de formation des pigments xanthophylliens ’ 
et carotiniens, &c. Revue Gen. de Bot., tom. xxxi, p. 372. 
8. ' j (1920) : Sur revolution du chondriome dans la cellule vegetale. 
Comptes Rendus, tom. clxx, p. 194. 
9. — — 3 ; — — : | (1920) : Sur les elements figures du cytoplasme. Ibid., p. 612. 
10,. — { — — - — — ’ — |§g| (1920) : Sur revolution du chondriome pendant la formation des 
grains de pollen de Liliiim candidum. Ibid., p. 1003. 
11. Ludtke, F. (1890) : Beitrage zur Kenntniss der Aleuronkorner. Jahrb. f. wiss. Bot, Bd. xxi, 
pp. 62-123. 
12. Maschke, O. (1859) : Bot. Zeit. 
13. Mottier, D. M. (1918) : Chondriosomes and the Primordia of Chloroplasts and Leucoplasts. 
Ann. Bot., vol. xxxii, pp. 98-114. 
14. O’Brien, M. (1895) : The Proteids of Wheat. Ibid., vol. ix, pp. 171-226. 
1L Pfeffer, W. (1872): Untersuchungen fiber die Proteinkorner und die Bedeutungdes Asparagins 
beim Keimen der Samen. Jahrb. f. wiss. Bot., Bd. viii, pp. 429-571. 
