A DIMINUTIVE GIANT 31 
economy remarkable far more by their incalculable num- 
bers than by their individual measurements. In regard 
to the Phyllecarida, Dr. Packard remarks that the palzeo- 
zolc species were gigantic in size, some being about a foot 
or more in length, while our recent Nebalia is less than an 
inch. The new species, Nebaliopsis typica, Sars, however, 
may extend the magnitude of modern examples to an inch 
and three-fifths. The Phyllopoda can exhibit Hstheria 
californica, Packard, in a shell 16 millimétres long, ten 
broad, and four thick, and Apus Newberryi, Packard, with 
the carapace, the abdomen behind the carapace, and the 
slender caudal appendages, each an inch long. But the 
amplitude more usual in the sub-class may be estimated 
by the respect paid to such a species as Bythotrephes 
crassicauda, Lilljeborg, 5 mm. long, one of the Cladocera. 
This is a colossal species of a fifth of an inch! Among 
the Ostracoda, Crossophdrus imperator, G. S. Brady, is 
one third of an inch long, and with good reason Dr. Brady 
cannot restrain his admiration of ‘this noble species, cer- 
tainly the largest of the known Cypridinide.’ 
In the Thyrostraca or Cirripedia a total length of two 
or three inches will deserve and earn the lordly epithets 
of eximium, requum, and gigas, but the Patagonian Balanus 
psittacus (Molina), which grows rapidly and is ‘ universally 
esteemed as a delicious article of food, attains six inches 
in length by three and a half in diameter, and a specimen 
has been found no less than nine inches in length, though 
only two and a half in diameter. Of the pedunculate 
species, Lepas anatifera, the common Goose Barnacle, can 
grow a stalk more than a foot long. Darwin says: ‘ The 
largest specimen which I have seen had a capitulum two 
inches in length; the longest, including the peduncle, was 
sixteen inches.’ 
