THE BLOOD-LIKE PHENOMENA. 
Ill 
Bleedings of fish are only to be kept in mind for examination. 
Red water-spiders (Hydrachna) and Naidese, have never been so 
deceptive as not to be immediately recognized, and have never excited 
the attention of mankind. 
b, VEGETABLE BODIES. 
11. By Trichodesmium erythrseum in the Red Sea. 
12. — Oscillatoria rubescens. 
13. — Oscillatoria subfusca. 
14. — Oscillatoria Mougeotii (Bory,) not the Osc. Mougeo- 
tiana of Agardh. 
15. — Sphseroplea annulina (which is of a cinnabar colour.) 
c, INORGANIC BODIES. 
16. — Red atmospheric dust. 
II. Are looked upon as a chemical effect produced by the mixing 
of different kinds of water, the ingredients of which have not been 
examined. Gonsag. 
III. Are looked upon as the operation of volcanic processes on 
springs. 
C. Red moist spots on the ground and on other bodies (blood 
spots,) are shewn to be an illusion caused by plants. 
17. By Palmella sanguinea (Thel. sanguinea, Persoon.) 
18. — Sarcoderma sanguineum. 
19. — My coderma (zoogalactina inebrosa.) 
20. — Hamatacoccus Grevillu. 
21. — Lepraria nivalis, (brick red.) 
22. — Geocharis nilotica, (cinnabar red.) 
To these belong also the matters already mentioned in regard to 
red-dew and red-rain. 
D. Blood-jellies are conjectured to be an illusion caused by plants. 
PALMELLA SANGUINEA. 
23. By Actinomyce meteorica rubra. 
Besides these twenty-three terrestrial substances and organic bodies, 
there are, indeed, many other masses and bodies remarkable for red 
colours, and which might produce similar appearances; but here we 
have only to do with such as have been viewed as metoric or blood 
masses or whose dense distribution, together with the invisibility of 
their form, and the striking red colour, which has power to arrest 
