186 THREE CRUISES OF THE ‘ BLAKE." 
characteristic inhabitants of deep water, though they come to 
the surface occasionally. 
Nearly all the ctenophores are found 
in swarms, which cover the surface 
for long distances. Schools of dis- 
cophores are not uncommon. I have 
frequently met Cyanez and Aureliz 
in such quantities that they appeared 
at a distance like huge sand-banks, 
' just rising to the surface of the water. 
Oceurring in windrows along the whole length of the Florida 
Reef is a small yellowish brown discophore (Fig. 93) (Linerges 
Fig. 93. — Linerges mercurius. 4 
Fig. 95. — Fourth Stage. 
Glossocodon Larva. 
Greatly magnified. 
Fig. 96. —Sixth Stage. 
7 27 Glossocodon Larva. 
Fig. 94. — Glossocodon tenuirostris. Magnified. Greatly magnified. 
mercurius), which looks like a thimble ; it is one of the most 
common of the West Indian medusæ, and is remarkable for the 
rig 97. — Janthina. 
Penny rancag Fig. 98. — Glaucus. Enlarged. 
