30 
REVISTA CHILENA DE HISTORIA NATURAL 
and the uropoda and pleopoda are consequently smaller. 
Pleopoda: — Five pairs of pleopoda are present, the 
outer pair envelope the rest which gradually decrease in 
size posteriorly. The outer (first) pleopoda consist of a 
large outer oar shaped blade and inner blade which is 
reduced to a slender spinelike projection, only two-thirds 
as long as the outer blade and slightly bilobed at the 
Fig". 2, — Calamura Porteri: 1, first pleopod. — 
2, second leg. — 3, third leg. — 4, fourth leg. — 
5, Sixth leg. — 6, seventh leg 
distal end; both blades are heavily fringed Avith long 
multiplumose setae. The second pair of pleopoda consists 
of an outer blade differing from that of the first pair in 
that it is smaller, has the outer lateral margin marked by 
a distinct incurvation in the median area and the entire 
