ISOPODS COLLECTED AT THE HAWAIIAN ISLANDS. 
825 
Entophilus omnitectus Richardson, sp. nov. Fig. 6. 
Body of female somewhat asymmetrical. Segmentation on dorsal surface more or less indistinctly 
defined. Marsupial pouch on ventral side extremely large and completely enclosed by incubatory 
lamellae, which are visible from a dorsal view at the sides of the body. 
Color of dorsal surface of thorax, orange; head, abdomen, and incubatory plates, white. The 
orange markings on the young within the marsupium give an orange appearance to the ventral side of 
the body. 
Head distinctly bilobed. Eyes absent. Both pairs of antennae visible from a dorsal view, the 
first pair consisting of perhaps three indistinct joints. The second pair extend half the length of the 
head and consist of a number of indistinctly defined joints. 
The segments of the thorax are more distinctly defined in some specimens than in others. Along 
the lateral margins of the thorax is a series of plates, a pair for each segment. These plates overlap 
Fig. 7 .—Entophilus omnitectus. (a) First lamella of marsupium, x 9.3; (6) Leg of 5th pair with 5th lamella of marsupium 
attached (on right side) and 5th “ lame pleurale,” x 7; (c) One double-branched pleopod, x 26. 
the dorsal surface of the thorax at the sides and are free on their whole surface, being atttached 
only at the extreme lateral margin to the legs. 
Similar plates are also found on the abdomen, where they meet five from either side along the 
median dorsal line. The exact homology of these plates is rather doubtful, but it seems probable 
that they correspond to the “lames pleurales ’ ’ of Giard and Bonnier. 
