138 
GAMMARIim 
AMPHIPODA. PH OXIDES. 
NATATOBIA. 
Subfamily— PHOXIDES. 
Ponloporeides. Dana, Un. St. Explor. Exped. p. 912. Spence Bate and 
Westwood, Rep. Brit. Assoc. 1855, p. 21. 
Phoxicles. Spence Bate, Ann. Nat. Hist. 1857, vol. xx. p. 525. Cat. 
Amph. Brit. Mus. p. 97. 
Cepiialon produced in advance, more like a hood than a rostrum. Inferior 
antennae situated considerably posterior to the superior. 
This subfamily offers several aberrant characteristics. 
The bead is generally produced far in advance of the 
antennse, looking like a hood hanging over the basal 
portions. The eyes in the most typical genera are almost 
rudimentary, and exist in the form of an orbicular mass 
of pigment, deeply seated in the head, without any lenses 
observable on the surface. The antennse are situated 
nearly in the same plane, the one behind the other. 
The peculiar form of the head, together with the im- 
perfect character of the eyes, induce us to believe that 
these animals dwell where vision is not essential, some 
burrowing in sandy or muddy bottoms, while others ex- 
hibit features of a parasitic character.'* 
The genus Pontoporeia being closely allied to Anonyoo 
in the preceding sub-family, we have been compelled to 
reject Dana’s sub-family name, and have employed in its 
stead a name derived from one of the most typical of its 
genera. 
* The recent observations of Mr. Spence Bate on the development of some 
species of Hyperina induce us to believe that there is a nearer connection 
between this sub-family and the latter than has hitherto been assigned to 
them. 
