232 Transactions.—Zi oology. 
Edriophthalmata. 
Tribe I.—Isoropa. 
Sub-tribe I. Idoteidea. Genus Idotea. 
Idotea affinis, Miers' Cat., p. 93. 
In the description given of this species the flagellum of the antenna is 
said to be about 20-jointed, and the length 13 inch. The species is said 
also to ** vary slightly in the number of the joints of the external antenna.” 
In a great number examined by me, I found the length to vary from 1 
inch to over 23 inches, and the number of joints in the flagellum from 
sixteen up to thirty-two. 
Sub-tribe IT. Oniscoidea. 
Fam. II. Oniscidee. Miers’ Cat., p. 98. 
Sub-Fam. I. Oniscing. Genus Oniscus. 
8. Oniscus punctatus, nov. sp. Fig. A.3. 
Body rather convex, oval, minutely granulated over the entire surface. 
Head short and broad; eyes small, round and black. Antenne finely 
hirsute, fifth joint the longest, equalling the last three. First segment of 
thorax wider than those succeeding ; last segment produced acutely back- 
wards. Abdomen not much narrower than thorax, but falling away rather 
abruptly; two anterior segments narrower than the others, and not pro- 
duced into exserted lateral angles; three succeeding segments subequal, 
with their latero-posterior margins acutely produced; last segment short 
and rounded. Caudal stylets short, external branch the longest, narrow- 
cylindrical, minutely hirsute, with two or three short sete at the extremities. 
Colour light brown, with darker markings. Length :8 inch. 
Dunedin. 
Sub-Fam. III. Ligiine. 
Genus Ligia, Miers’ Cat., p. 108. 
4. Ligia quadrata, Hutton, MS. Cat. Fig. A.4. 
Oval, sub-depressed, with minute granulations on the back, but free from 
hairs. Three posterior segments of thorax acutely prolonged backwards on 
either side. Abdomen considerably narrower than thorax, last segment 
sub-quadrate, the angles hardly projecting. Outer antenna two-thirds the 
length of the animal, fourth and fifth joints much the longest; flagellum 
from 15-to 23-jointed, minutely setose. Base of caudal stylets about half 
as long as abdomen; rami slightly unequal, shorter branch with a long 
slender seta, which reaches beyond the extremity of the longer branch. 
Colour yellowish-olivaceous closely speckled with black. Length :5 inch. 
Dunedin. 
This species lives among loose stones on the beach, and runs with great 
rapidity. 
