NEBALIADiE. 
31 
yellow colour, clouded with marks of a deeper hue. The 
edges of the notch in posterior part of carapace are finely 
toothed, those in the middle and posterior extremity being 
the strongest and largest. The appendages of the first 
pair of feet, or rami, are very long; the inferior being 
frequently two inches in length ; the superior, one inch* 
and curved, and the middle is about one third longer. 
The caudal segment of body is short, and its two appen- 
dages very long, being sometimes more than two inches 
in length. The segments of abdomen are each studded 
over with numerous, short, stout, hooked spines, of a dark 
brown colour, while the long caudal appendages are fur- 
nished with numerous short hairs, or setae. 
Hab. — Pond on Bexby (Bexley?) Common, Rev. L. 
Brown, 1767. Devonshire, Dr. Leach. Bristol, W. 
Clayfield, Esq. Brit. Mus. 
Family 2 — NEBALIADiE. 
Neb alia, Leach , Desmarest , Latreille , M. Edwards, 8fc. 
Character. — Antennae two pairs, large and ramiform ; 
eyes, two, pedunculated ; feet, twelve pairs, 8 branchial 
and 4 natatory ; carapace large, inclosing head, thorax, 
and part of abdomen almost as in a bivalve shell. 
Bibliographical History. — Otho Pabricius was the first 
who described any species of this genus. In his ‘ Fauna 
Groenlandica, 5 1780, he mentions finding on the sandy 
shores in Greenland, chiefly at the mouths of rivers, a 
small Crustacean, occurring sparingly, which he describes 
under the name of Cancer bipes. 
In 1796, Herbst, in his ‘Krabben,’ vol. ii, p. Ill, 
describes the same animal, placing it among the Gam- 
mari, under the name of Cancer ( Gammarellus ) bipes. 
Montagu is the next author who has personally noticed 
the genus, and is the first observer who has described it 
