Branchiæ, [190].
Brent, Mr., on house-tumblers, [214].
——, on hawks killing pigeons, [362].
Brewer, Dr., on American cuckoo, [217].
Britain, mammals of, [396].
Bronn on duration of specific forms, [294].
Brown, Robert, on classification, [415].
Buckman on variation in plants, [10].
Buzareingues on sterility of varieties, [270].
C.