UNOBTAINABLY COMMON 943 
Bathynomus, A. Milne-Edwards, 1879, is distinguished 
from the three preceding genera by having supple- 
mentary ramified branchiz uniquely developed at 
the bases of the pleopods. 
Anuropus, Beddard, 1886, unlike the four preceding 
genera, is without eyes, and the uropods have sub- 
membranaceous branches concealed beneath the 
telson. 
The genus Cirolana comprehends a very large number 
of species. That named Cirolana spinipes by Bate and 
Westwood is identified by Hansen with the earlier Cirolana 
borealis, Lalljeborg (see Plate XV.). It is a good swimmer, 
tenacious of life, a savage devourer of fish, and not to be 
held in the human hand with impunity. Anotber British 
species, Cirolana Cranchit, Leach, distinguished from the 
preceding by the much less spinose limbs, resembles it in 
abundance. Upon one occasion at Anstis Cove, near Torquay, 
a fishing-boat drawn up on the beach was swarming with 
it. As the boatman had often promised to preserve any 
small marine curiosities met with in his fishing, his at- 
tention was called to these creatures crawling in such num- 
bers over his boat. When asked why he had never brought 
any of the kind to the naturalist, his reply was that they 
were so common that he could not imagine any one want- 
ing them. It is in this way that the efforts of the lands- 
man are repeatedly baffled, unless he can fish for himself 
in sheltered inlets or has his breast and interior constructed 
of oak and triple bronze to qualify him for dredging in the 
open. The American Cirolana concharum (Stimpson) feeds 
sweetly on the common edible crab, otherwise called the 
‘blue-crab,’ of the United States. From a single crab 
as many as a hundred and eight specimens of the Cirolana 
have been taken. 
Conilera thus far is limited to a single species, Cenilera 
cylindracea (Montagu), known from various parts of Great 
Britain, including the Channel Islands, and from the 
Mediterranean. Its piratical behaviour is discussed by 
Dr, F. Day in his remarks upon a specimen of a Dog-fish, 
