F 
ut 
PEETER BI E STRE NUS SORT. EL ae EHE 





THE FRESH-WATER AQUARIUM. 373 
ship to the Tardigrades and the Pentastoma, the latter being a 
degraded worm, living parasitically within the bodies of other 
animals, 
EXPLANATION OF PLATE VI. 
* 
Fig. 1. Larva of a bird mite, Dermaleichus. 
Fig. 2. Pupa (?) of the same. 
Fig. 3. Adult female of the same. 
Fig. 4. Larva of Typhlodromus pyri Scheuten. (From Scheuten.) 
Fig. 5. Larva of another species of Typhlodromus. * we 
Fig. 6. Chelytus (probably undescribed). 
Fig. 7. Sarcoptes scabiei DeGeer. (From Gervais.) 
Fig. 8. Heteropus ventricosus Newport, fully-formed female. (From 
Newport 
ewport. 
- Heteropus ventricosus Newport, gravid female. > (From New- 
el 
da 
e 
port. 
Fig. 10. Ixodes bovis Riley. 
Fig. 11. Ixodes unipunctata Packard. 

a 
THE FRESH-WATER AQUARIUM. 
BY C. B. BRIGHAM. 

: (Continued from page 212.) ` 
Tue question is often asked what kinds of plants are th 
best for the aquarium, and where are they found? Most 
Writers on this subject give long lists of plants, which are 
useless to those who are unacquainted with the botanical 
names. To the majority of people not even the common 
names of most water plants are known, and to such it be- 
comes very perplexing to make a selection from a list bare 
of any deseription. Although it is insisted.by some that the 
tank should not be filled with every kind of plant that the 
collector can obtain, yet it seems as if there was no sound 
reason why all the plants that flourish in the aquarium should 
not be placed therein. In a properly managed aquarium 
there are very few water plants which will not do well; the 
few exceptions being found in the lilies, which require a 
