CRUSTACEA. 671 
feet chelate, unequal, the last much smaller. Middle antenne 
elongate, with two unequal sete at the apex. 
Sp. Birgus latro, Pagurus latro Fasr., DesmMar. Crust. Pl. 30, fig. 3. 
Phalanx II. Aippotdea. First pair of feet monodactylous or 
subchelate. Four or six following feet with last joint pinniform, 
lamellose. Fifth pair of feet short, thin, incurved. Penultimate 
segment of tail with two appendages on each side lamellose, oval, 
ciliate. Shell oblong. 
Hippa Far. (exclusive of some species). External antenne 
very long, terminated by a multiarticulate ciliated seta. First pair 
of feet with terminal joint lamelliform. 
Sp. Hippa emerita, Cancer emeritus L., DESMAR. Crust. Pl. 29, fig. 2, on the 
coast of Brazil. 
Remipes Larr. Middle antenne bisetose at the apex, longer 
than external. First pair of feet long, with last joint acuminate. 
Sp. Remipes testudinarius Latr., Hippa adactyla Fasr., Cuv. R. Ani. éd. 1. 
Pl. 12, fig. 2, DEsMaR. Crust. Pl. 29, fig. 1, from the coast of New 
Holland. 
Albunea DAup., Fase. (in part). Middle antenne longer than 
external, terminated by a single seta, very long. Anterior feet sub- 
chelate, with moveable finger incurved. Shell oblong, with anterior 
margin broader, almost straight. 
Sp. Albunea symnista FABR., DESMAR. Crust. Pl. 29, fig. 3, Gu&RIN Iconogr., 
Crust. Pl, 15, fig. 1, from the Indian Ocean. 
Section II. Decapoda brachyura (Kleistagnatha Fasr.). Tail 
or posterior part of abdomen small, reflected forwards, almost 
always received in a furrow of sternum, not terminated by a pinna, 
with appendages filiform, in females oviferous, not natatory. Third 
pair of maxilliform feet broad, covering the cibarious organs. Vulvee 
mostly situated in sternum, between the bases of third pair of feet. 
Antenne short ; middle received in a furrow under the anterior 
margin of shell in most, terminated by a double subulate seta. 
A. ‘Two or four last feet inserted towards the back, not in the 
same plane with anterior feet. 
