116 STALK- AND SESSILE-EYED CRUSTACEA 
Very much flattened, oval. Head encased in and coalescent with 
the first segment of the body. Eyes placed on protuberances on the 
upper surface of the head. Five succeeding segments of the body 
presenting indications of a division into three lobes, of which the lateral 
are formed by the greatly devoloped epimeral pieces, or coxe. Seventh 
segment rudimentary. Abdomen composed of only three distinct seg- 
ments, of which the last is very large and scutiform. Antenne large, 
compressed; superior pair short, with the peduncle four-jointed, inferior 
with the peduncle five-jointed, two last joints elongate. First pair of 
legs with a large subchelate hand, second pair with a smaller hand 
in the male, in the female all the legs, except the first, are adapted 
for walking. 
124. Serolis paradoxa. 
Oniscus paradoxus, Fabr. Mantissa. 1, p. 240, (1787). 
Serolis Fubricii, Leach, Dict. Sci. Nat. xii, p. 840, (1818); M. Edw. 
Hist. Nat. Crust. i, p, 231, (1840); Grube, Archiv. f. Naturg. xh, 
p. 209, (1875). 
Serolis paradoxa, Aud, and M. Edw. Archiv. Mus. Hist. Nat. u, 
p. 28, (1841). 
Serolis Orbignyana, M. Edw. Hist. Nat. Crust. m1, p. 282, (1840) ; 
Grube, Archiv. f. Naturg. xl, p. 209, 225, (1875). 
Serolis Orbignyi, Aud. and M, Edw. Archiv. Mus. Hist. Nat. ii, p. 25, 
pl. ii, fig. 8-9, (1841). 
Depressed, nearly smooth, or with faint punctulations near the posterior 
margin of each segment. Head rugose between the eyes. Segments 
of the thorax with the posterior margin sinuated, the two or three last 
segments curving backward, so that the postero-lateral angle of the last 
segment projects backward to a distance equal to two-thirds the length 
of the last abdominal segment. Last segment of the abdomen flat, 
subtriangular, with the apex appearing slightly emarginate, with five 
straight longitudinal ridges, of which two parallel to the posterior 
margin of the penultimate segment, two superficial and diverging 
posteriorly, one longitudinal and median, this latter is interrupted near 
its base, and the basal part terminates in a stnall spine. Caudal appen- 
dages very small, the outer ramus a little smaller than the inner one. 
Length usually rather more than 1 in. 
New Zealand (Coll. Brit. Mus.). 
Very abundant at the Falkland Islands, 
