NOTES ON CRUSTACEA FROM FAIRLIE AND HUNTERSTON. 351 
hand-net, one has to be very much on the alert, as colour mimicry, 
as well as mimicry of form, is by no means rare among these 
low forms. J. curticorne has only lately been recognised as a 
Clyde species. My son records the interesting fact concerning it 
that young dabs from Morecambe Bay were found to have been 
feeding largely on this Entomostracan. He had obtained numbers 
of them in the stomachs of the young fish. ! 
Eictinosoma herdmani, T. and A. Scott.—This is quite a dif- 
ferent species from the last, being more slender and elongate; its 
colour is white, or nearly so, and it is readily distinguished from 
any other British member of the genus. Though added to the 
British fauna only a few years ago, it does not seem to be very 
uncommon; probably its distribution is local. 
Lradya minor, T. and A. Scott.—The species belonging to the 
two genera Letinosoma and Bradya are so like each other in general 
appearance, that in some cases it is hardly possible to tell the 
genus to which they belong without dissection ; one can usually, 
however, distinguish between Lctinosoma and Bradya by the 
difference in the structure of the posterior foot-jaws. Bradya 
mumor has a superficial resemblance to Hctinosoma curticorne, 
but is not so dark coloured. These two resemble each other also 
in their habitat, which appears to be more or less estuarine. 
Tachidius brevicornis (Miller) and 7. littoralis, Poppe, 
were both found in the brackish pools at Hunterston. This 
is the first time Z. brevicornis has been recorded from the 
Clyde area, but the other has been previously recorded. The 
genus is readily distinguished from other British Copepods by | 
the structure of the fifth pair of thoracic feet, but 7. brevicornis 
has fifth feet that are large and foliaceous, while those of 7. 
littoralis are small, and their sete are rather spinuliferous 
than plumose. 
Ameira exilis, T. and A. Scott, is an addition to the Clyde 
fauna. It is a moderately large species, and was discovered a 
few years ago, near Dunbar, on the Hast Coast. 
Canthocamptus parvus, 'T. and A. Scott.—This species was 
first discovered in Aberlady Bay, Firth of Forth, and is now for 
the first time added to the Clyde fauna. Though a small 
t Trans. Lin. Soé., 2nd Ser:, Zool., Vol. VI., Part 5, p. 431. 
