98 STALK- AND SESSILE-EYED CRUSTACEA 
Abdomen rounded at the extremity. External caudal appendages 
nearly triangular, with the inner branch short, conical, scarcely con- 
spicuous above. Antenne reaching to half the length of the second 
segment. Length nearly 4 in. (H.). 
Auckland (Heller). 
Family II. ONISCIDZ. 
Cloportides maritimes, M. Edw. Hist. Nat. Crust. ili, p. 152, (1840). 
Cloportides terrestres, M. Edw. (part) Hist. Nat. Crust. iii, p. 158, 
(1840). 
Oniscide, Dana, U.S. Explor. Exped. xiv, Crust. part i, p. 714, 
(18538). 
Body moderately convex, and usually loosely articulated. Segments 
of the abdomen distinct, terminal segment small. Caudal appendages 
exserted, styliform. Mandibles not palpigerous. Internal antenne very 
small, 
Sub-Family I. Onrscina. 
Porcellionides, M. Edw. Hist. Nat. Crust. ii, p. 159, (1840). 
Oniscine, Dana, U.S. Explor. Exped. xiv, Crust. part nu, p. 719, 
(1853). 
External antenne geniculate at the fifth jomt. Base of the caudal 
appendages very short, with two very unequal rami, of which the 
longer is exserted externally; the other imternal, and placed beneath 
the abdomen. (Maxillipeds three-jointed, the two last joimts small). 
The minute terminal jointed appendage to the antenne that is found 
in some species of Oniscine, is not considered in enumerating the 
joints of the flagellum. 
ONISCUS. 
Oniscus, Latr. Hist. Nat. Crust. et Ins. vu, p. 38, (1804) ; M. Edw. 
Hist. Nat. Crust. ii, p. 162, (1840); Dana, (sub-gen.) U.S. Explor. 
Exped. xiv, Crust. part ii, p. 715, (1853). 
Body oblong-oval, moderately convex, loosely articulated. External 
antenne subcylindrical, with their base partly concealed by the front 
of the head, eight-jointed ; the three terminal joints constituting the 
flagellum, 
