226 A HISTORY OF RECENT CRUSTACEA 
sand, in which they may often be observed to bury them- 
selves with great facility after making an abrupt leap to 
escape the hand stretched out to capture them. They 
need, it is said, all their powers of concealment, being 
eagerly hunted and captured by nearly all the larger fishes 
which frequent the same waters, and, according to Verrill 
and Smith, on the American coast this species constitutes 
the principal food of the weak-fish, king-fish, white perch, 
blue-fish, flounders, striped bass, and others. It may be 
readily surmised that many of the flat-fishes, lying as they 
do on the floor of the sea, must have a great advantage in 
the sport of shrimping. A second species, Crangon All- 
manni, Kinahan, found in Great Britain and Norway, is 
distinguishable by the two parallel keels of the sixth seg- 
ment of the pleon, the groove between the two keels being 
an easily discerned feature. ‘This is found in deep water. 
Kinahan in 1864 instituted for ita new genus Steiracran- 
gon, which may be allowed to lapse. It is not mentioned in 
‘Bell’s History of the British Stalk-eyed Crustacea,’ not 
being known when that was published. Bell there records 
six species of Crangon, but, except in the case of Crangon 
vulgaris, the names he gives them are not universally 
accepted. For Crangon fasciatus, the name Hgeon fasciatus, 
Risso, is sometimes preferred, Bell’s own species Crangon 
sculptus being transferred to the same genus, because the 
carapace in these species is not dorsally depressed. 
Crangon spinosus, Leach, 1815, according to Sars, pro- 
perly belongs to the genus Pontophilus, Leach, 1817, of ° 
which it is the type. Crangon trispinosus (Hailstone) and 
Crangon bispinosus (Westwood) have been assigned (but 
the first with very doubtful correctness) to Cheraphilus, 
Kinahan, 1864, in which, as in Pontophilus, the second 
trunk-legs are much shorter than the third, instead of 
being equal to them in length as in Crangon. Crangon 
hispinosus is now identified with Crangon nanus of Kréyer, 
and may therefore be called Cheraphilus nanus. Never- 
theless all the seven species above menticned are by some 
writers still retained in the genus Crangon, together with 
two others also found in Britisk as well as Norwegian 
