CYRTOPHIUM. 
195 
retreat, and seize the marine animalcules on which they 
feed. The Corojohium , which runs very quick, wages war 
on these Annelids, and pursues them relentlessly. Numbers 
of them may be seen attacking sea-worms ten or twenty 
times their size, and even small fish and mollusca that come 
in their way are eaten by them. Millions of them may 
sometimes be seen beating the mud with their large antennae, 
in pursuit of their food. In their turn, they become the 
prey of many birds and fishes. 
Although Mr. Bate does not appear to have met with 
any species of Say^s genus TJnciola, we may mention that 
Mr. Gosse found the Unciola irrorata of the American na- 
turalist in our seas. - * 
Gen. 91. CYRTOPHIUM, Dana. 
The first to the seventh joints after the head, inflated; the 
following joints compressed. The last false feet rudimentary. 
Telson scale-like. 
Cyrtophium Darwinii, Spence Bate. — Dorsal surface 
imbricated ; the fourth false foot longer than the fifth. 
* Mr. Gosse has figured this species in the first part of his excellent 
Manual of the Marine Zoology of the British Isles, p. 141 (fig. 256, on 
p. 139). 
