2 STALK- AND SESSILE-EYED CRUSTACEA 
Sub-Tribe I. OxyryuyNcHA. 
Oxyrhynchi, Latr. (part) Hist. Nat. Crust. vi, p. 85, (1803). 
Oxyrhinques, M. Edw. Hist. Nat. Crust. 1, p. 263, (1834). 
Maioidea v. Oxyrhyncha, Dana, U.S. Explor. Exped, xiii, Crust. part 1, 
p- 66, (1852). 
Carapace more or less narrowed and produced or rostrate anteriorly, 
with the branchial regions greatly developed, and the hepatic regions 
rudimentary. Branchie nine in number. Internal antenne longitu- 
dinally plicate. Epistome usually large. Buccal cavity subquadrate ; 
efferent canal from the branchie terminating at the sides of the palate. 
Fourth joint of the external maxillipeds inserted at the summit or at 
the antero-internal angle of the third joint. Male genital appendages 
inserted in the base of the fifth pair of legs. 
LEGION I. MAIINEA. 
Maiinea, Dana, U.S. Explor. Exped. xii, Crust. part i, p. 76, 
(1852). 
Body elongate, rounded behind, narrowed, produced, and rostrate 
anteriorly. Basal joint of the external antenne placed beneath the 
eyes. Legs all of normal shape. 
Family I. MAIID/. 
Maiide, Dana, U.S. Explor. Exped. xii, Crust. part i, p. 77, (1852). 
Hyes capable of being retracted into the usually large orbits, which 
are nearly always incomplete or marked with fissures on the upper and 
lower margins. 
HUENIA. 
FTuenia, De Haan, Faun, Japon, Crust. p. 83, (1839), 
Carapace varying in shape in the two sexes. Rostrum triangular, 
acute, deep and laterally compressed. yes scarcely projecting beyond 
the orbits, which are scarcely defined below. Basal joint of the external 
antenne without a spine at the distal extremity, second and third joints 
cylindrical. Epistome rather shorter than the mouth, concave. The 
legs rather slender and compressed, those of the first ambulatory pair 
much longer than the rest. 
