1901-1902.) The Entomostraca of Mid-Lothian. 321 
in the Trossachs and the English Lakes, and near Bourne- 
mouth. 
We obtained Alonella rostrata on our second visit to Cobbin- 
shaw, on a grey cheerless day, most unfavourable for collect- 
ing. We walked right round the large reservoir, fishing at 
thirty or forty points with little result, catching hardly any- 
thing but Gammarus. But on reaching home we looked 
carefully through the catch, and found this one rare specimen. 
One thing we have learned by experience is, that however 
poor a collection appears to be, it is worth while to examine 
it thoroughly. 
Chydorus sphericus, with which we shall conclude, is by far 
the commonest cladoceran, and perhaps the commonest of all 
‘the entomostraca, in Mid-Lothian, though Cyclops serrulatus 
Tuus it very close. It varies greatly in size, colour, and even 
outline. We have observed the males in only one locality, 
the small pond on House o’ Hill farm; and this in spite of 
the fact that we were on the look-out for them all last 
“summer. 
Mr T. Scott desires to say that in the Note on the list 
of fresh-water crustacea (ante, p. 260) No. 42, Ceriodaphnia 
_seitula, Herrick, should read, “This looks very like C. afinis, 
‘“Lilljeborg.” Nos. 49 and 50, Daphnia hamata, Brady, should 
Falso read, “These I regard as immature forms of D. pulez, 
No. 46.” 
. (We are indebted to both Mr T. Scott and Mr D. Scourfield 
for having drawn our attention to Ceriodaphnia affinis, Lillje- 
borg; and having compared my drawings carefully with those 
of Lilljeborg, I now think that our specimens belong to that 
species. It seems probable that the name (. scitula, Herrick, 
which we appended to No. 42, is a synonym of C. affnis, 
‘Lilljeborg.—B. 8S.) 
_ In conclusion, we have to thank the Society for directing 
our attention to a most interesting group of creatures, of 
which previously we knew scarcely anything; and we can 
_very heartily recommend the study of the entomostraca to any 
-member who is at a loss for a special subject to take up. 
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