414 Fry —On Aggregations of Proteid in 
adding dilute ferric chloride. The proteid is then stained 
blue. This test confirmed the results already obtained. 
Thus the bodies were shown to consist of coagulated masses 
of proteid ; the coagulation being probably in part the result 
of the action of the alcohol. In the fresh state the proteid 
occurs in various forms : — 
(i) It may be distributed throughout the cell-contents 
either as a fluid or in finely divided granules. If cells 
containing this diffused proteid be treated with i per cent, 
ammonium carbonate for twenty-four hours the proteid 
crystallizes out. 
(f) A form common in young shoots is that shown in 
Fig. i a. These long crystalloids occur either singly in 
bundles or united to form sphaerocrystals. They are similar 
to those of Galtonia candicans 1 and Urtica urens 1 2 . 
(3) The long rod-like crystalloids produced artificially by 
the action of ammonium carbonate on (1) also occur naturally. 
They are shown in Fig. 1 / 3 . They correspond to the forms 
found in Griffithsia neapolitana 3 . 
(4) A form of crystalloid that is common in the epider- 
mis of the leaf is the common rhombohedral crystalloid 
which is found in the tuber of the Potato, the berries 
of Solanum americanum , and in Bertholletia excelsa. Like 
the crystalloids of the last-named plant, those of Eu- 
phorbia splendens are not doubly refracting. The crys- 
talloids of the potato-tuber, on the contrary, are doubly 
refracting. Fig. 1 y. 
Thus we see that this one species contains all the more 
remarkable forms of crystalloids that have been described as 
occurring elsewhere in widely different plants. But besides 
these there is a peculiar form. This is shown in Fig. 2, 
which represents a section of the stem in the fresh state 
mounted in water. 
There are really two forms here, (1) the loose aggregations 
1 Leitgeb, Mitth. aus dem Bot. Inst, zu Graz, 1886. 
2 Kallen, Flora, 1882, No. 5. 
3 Klein, Pringsheim’s Jahrb. fiir wiss. Bot., vol. XIII. 
