880 THE AMERICAN NATURALIST. (VoL: XXXII. 
cases to obtain a firm union, and in due time a compound imago 
would emerge, generally with the help of the operator, however. 
All attempts to join lateral halves of two different pupæ were 
unsuccessful, and the proportion of failures was large in all the 
series, but there were enough successful cases to give some interest- 
ing results. 
It was found to be a little more difficult to unite pupæ belonging 
to different species or genera, than where the two components belong 
to the same species. Thus, of the former category only 7 cases out 
of 62 resulted favorably, while 14 out of 95 were successful of the 
latter. In regard to the way in which the parts were united, — in 
cases of union in normal proportion the successes were 4 out of 61, 
in “tandems” they were 3 out of 27, and in twins, ze. union of 
homologous parts, back to back, etc., they were 14 out of 69, over 
20 per cent. 
The results in regard to reciprocal color effects were inconclusive, 
and we still await the histological details. BPR 
ZOOLOGY. 
The Fresh-Water Fauna of Ceylon.'— Seven collections in five 
localities in the swamps and lakes of Ceylon have afforded Dr. E. von 
Daday the opportunity of increasing the list of the known micro-fauna 
of this island from 42 to 170 species, 39 of which he describes as 
new. The 31 Protozoa observed in the collections or raised from 
dried moss are mainly cosmopolites, as are also the 42 species of 
Rotifera. Among the Entomostraca the Cyclopidz alone are repre- 
sented by cosmopolitan species, while the Cladocera have a smaller 
ratio of such forms mingled with others having an Oriental, Ethiopian, 
or Australian distribution. ‘The Centropagide and Ostracoda are 
represented exclusively by species confined to the three regions 
named. This examination of the micro-fauna indicates that Ceylon 
is a meeting ground for the Palaarctic, Oriental, Ethiopian, and 
Australian types of minute life. CAR 
Butler’s Birds of Indiana. — For a number of years Mr. Amos W. 
Butler has been a diligent and intelligent student of the higher verte- 
1 Daday, E. Von. Mikroskopische Süsswasserthiere aus Ceylon, Termes. 
Fiizetek, Bd. xxi, Anhangsheft. Budapest, 1898. 123 pp, 85 illustrations- 
