110 
THE BLOOD-LIKE PHENOMENA. 
class of rotiferous or wheel animals. I am acquainted with four dis¬ 
tinct species of the genus Euglena: E. viridis. Cere, pleuronectes, 
M.; and a new species, E. spirogyra. 
Weber’s animalcule may form a fifth species, as Euglena sanguinea. 
No more zoological particulars belong to this place. 
I close the enumeration of my observations with the information, 
that during this year at Berlin, the alga form Sphseroplea annulina, 
in the lowlands at Kreutzberg towards Schonberg, the flooded fields 
at the end of May appeared of a most beautiful orange-colour, which 
passed into a lively cinnabar, to an extent which I had never before 
witnessed. This algaform is first green, hence the Sphseroplea sericea 
of Agardh refers to the colour, which was occasioned by Bory de St. 
Vincent’s Cadmus sericeus, which is just the earlier state of the same 
plant. 
A retrospect of all the facts regarding bodies which really or ap¬ 
parently communicate a red or blood-like colour to waters and aqueous 
meteors, affords us the following catalogue of them. 
A: Blood-dew, Red-dew, Blood-rain, and Red-rain. 
I. Are decidedly shewn to be a deception caused 
1. By an excretion from bees. 
2. from butterflies: 
3. By red atmospheric dust. 
IT. Are probably sometimes effects of chemical processes, produ¬ 
cing red rain and red dew, but no particular instances supported by 
positive and undeniable proof have been adduced by any one. 
B. Stagnant red waters (blood water,) Red springs. Red Sea¬ 
water. 
I. Are shewn to be an illusion produced by 
a, ANIMAL BODIES. 
4. 
5. 
Great numbers of Entomos- 
traca,. 
Great numbers. 
{ 
of Daphnia pulex. 
of Cyclops quadricornis. 
6 . 
| indefinitely minute Akalephae P 
l in the sea. 
7. (of Euglena sanguinea (Weber’s 
Infusoria.< infusoria at Halle.) 
8. Great numbers. £ of Astasia (Volvox) lacustris. 
9. Do. Do. fof Astasia (Enchelys) sangui- 
Infusoria. < nea. 
10. Great numbers. (of Astasia hcematodes. 
