Canthocamptus. 
C. staphylinus, Jurine. The lake and the water-lily pond. 
C. minutus, Claws. Only obtained from the lake; on one 
occasion by washing damp moss from near the water's edge. 
C. trispinosus, Brady. Tank near Jodrell Laboratory and the 
riverside ditch. 
jointed instead of two. This is certainly a difference of some 
importance, according to the accepted ideas as to the value of the 
structure of the feet for specific determination, but it seems impos- 
sible to place this single character against all the others. This is 
a new record for the British fauna. 
Nitocra, Boeck. 
N. hibernica, Brady. Pond in front of Museum No. I. 
Belisarius, Maupas. 
account of the structure does not agree with what I find in my 
specimens. A possible explanation of these differences in a single 
character may be that both Mrázek and Hartwig had examples in 
different stages of development, neither being quite adult. 
MALACOSTRACA. 
Asellus aquaticus, L. Lake. 
Oniscus asellus, L. “ Woodlouse.” 
