26 
REVISTA CHILENA DE HISTORIA NATURAL 
conspicuous, three-jointed, with the terminal joint strongly 
toothed, forming a somewhat curved, comblike effect 
along the ventral margin of the blade. 
The maxilla is a slender tapering lancet, finely 
toothed along the distal part. The maxilliped has the 
basal part narrow oblong; the palp consists of three arti- 
cles, the terminal one being extremely acuminate and the 
second article beset Avith irregularly placed setae, along 
the outer margin. Seven pairs of legs are present. All 
six abdominal segments distinct in both sexes. 
First pleopoda of male consist of ovate outer plate 
and slender stylet; second pleopoda, of large ovate outer 
blade^ smaller ovate inner blade and an unfringed stylet; 
third, fourth and fifth pleopoda consist of similar and sub- 
equal ovate outer and inner blades, each cleft in the 
outer median lateral margin. All pleopoda, of large hea- 
vily fringed with multiplumose setae; the inner blades of 
the third, fourth and fifth pleopoda are tipped with hollow, 
treelike spines. 
Uropoda and telson form a fanshaped tail, that of the 
male being conspicuously longer and stronger and not so 
widely expanded, while those of the females are shorter 
and very widely expanded. 
Genotype: Calamura Porteril from Pisagua, Chile. 
Calamura Portei'i Boone, n. sp. (*) 
(Lám. II; figs. 1 y 2) 
Head squarish with frontal margin produced to a 
wide median point, anterolateral angles similarly but 
more decidedly produced. Eyes large, subelliptical, black, 
composed of large ocelli and occupying the entire antero- 
lateral angles of the head. The superior antennae con- 
sists of one long article followed by two short articles and 
a flagellum of nine subequal rings terminating in a spine. 
The first, second, third, fourth, fifth and sixth articles of 
the flagellum each bear a long brushlike tuft of setae 
which is directed obliquely ventrally. The inferior an- 
(*) Dos ejemplares fueron devueltos al descubridor de la especie, 
los que colocamos en el Museo Xacional. — La Redacción. 
