9 oa CRUSTACEA. 



G. 1. Rtjppellia, Edw.— Carapax latior. Antennae pars mobilis externas orbita 

 paululum remota. Articulus maxillipedis externi 3tius paulo transversa. 



G. 2. Eriphia, Latr. — Carapax angustus, convexus, fronte saepius valde declivi. 

 Antennae pars mobilis externae orbita longe remota. Articulus maxillipedis ex- 

 terni 3tius paulo transversus. 



G. 3. Domjecius, Eydoux et Souleyet* — Ruppellice forma antennisque externis 

 affinis. Carapax depressus, angustus. Articulus maxillipedis externi 3tius valde 

 transversus, brevissimus. 



G. 4. Trapezia, Latr. — Carapax subquadratus, planus, glaber, fronte horizontalis, 

 leviter 6-8-dentatus aut sinuosus, lateribus longitudinalis. Tarsi non unguicu- 

 lati, minute spinulosi. Brachium ultra carapacem longe exsertum. 



G. 5. Tetralia, Dana.-\ — Carapax aspectu Trapezia affinis. Frons horizontalis, 

 rectiusculus, subtilissime denticulatus. Tarsi breviter unguiculati. Brachium 

 ultra carapacem paulo exsertum. 



G. 6. Quadrella, Dana. — Carapax subquadratus, paulo convexus, laevis, fronte 

 horizontalis, 6-spinoso-dentatus. Tarsi unguiculati. Brachium ultra carapacem 

 longe exsertum. 



Subfamily I. OZIN^E. 



Genus OZIUS. 



Ozius truncatus, Edwards. 



Plate 13, fig. & a, female, natural size, from Bay of Islands, New 

 Zealand ; b, abdomen of same, natural size; c, moveable finger of 

 larger band. 



Bay of Islands, New Zealand, and Illawarra, New South Wales. 



Length of carapax from Illawarra, one and seven-eighths inches j 

 greatest breadth, two and seven-eighths inches; ratio of length to 

 breadth, 1 : 1-53. Of female, from New Zealand, length, one and one- 

 sixth inches; breadth, one and three-fourths inches; ratio, 1:1*5. 

 Carapax nearly plane above, but not glabrous, granulous anteriorly. 

 The areolet 2 F is prominent ; 1 M and 2 M are united ; 2 M and 3 M 



* Voj. of the Bonite, Crust., pi. 2, f. 5 ; also, « Yoy. au Pole Sud," under D'Urville, 

 in the Astrolabe and Zelee, plate 6, figs. 3-7, by Hombron and Jacquinot. 

 f Amer. Journal Sci. [2], xi. 223. 



