44 
THE LIVING WORLD. 
PERCH LOUSE. 
{Acht hexes p escarum.) 
LEAF FISH LOUSE. 
(Argulus foliactus.) 
WORM. 
{Liftinona terebraus.) 
LOUSE CRAB. 
(Cyniothoa a strum.) 
my hand with a suddenness and force comparable to an electric shock. The blow 
was effected by the large arms, which were closed and projected with the quick¬ 
ness of lightning.” 
Phyllosome, or Leaf-shaped Shrimp , also known as the glass crab, is a rare 
creature, found only occasionally about the Channel Islands. It is small in 
and but for its resemblance to a spider, would be considered a 
very beautiful animal. The legs are eight in number, radiating from the body, 
and from the second joint of each issues a second limb, the anterior being rudi¬ 
mentary, while the posterior have even 
greater development than the true legs. 
The body is harp-shaped and so trans¬ 
parent as to be almost invisible, except 
for the two brilliant blue eyes that are 
set on the projecting ends of antennae, 
like the snail’s, though they are not ex¬ 
tensible. 
The Nauplus is a larval form that 
was long mistaken for a species. 
The Gill-foot .( Crenilabus tinea ) is notable 
because the eggs will hatch however long the 
process be delayed. It is a small green species of 
the European connor. 
The Mussel Crab (. Notodromus monachus) is 
a queer-looking creature, wdiose body is covered 
by an egg-shaped shell, with little hairs at the 
back part, and in front an upper and lower pair 
of fringed antennae. 
The One-eyed Canthocarpoid ( Cyclops ca7i- 
thocarpoides) is a singular crustacean, segmented, 
and as one goes backward growing beautifully less. 
The Sea Trumpet ( Triton variegatus ) is the inhabitant of the well-known 
conch shell. The Periwinkle ( Litorinia litona ) is found upon the rocks in 
British waters, and is a well-known article in the London fish market. The 
land snail still continues to contribute to the luxuries of the table, for which it 
was fattened in the time of the Roman gourmands. 
The Sea Hare (Uplysia depilans) is a queer specimen of the snail, which 
exudes a fluid resembling violet ink. 
TRILOBITE FROM WALL WORM, OR SOW BUG. 
silurian formation. ( Oniscus tnurarius .) 
