J. YAMANE. 
blood. It is said by our farmers that the animals of the "Ivx[)ress" family 
were tjenerally small, but excellent milkers and remarkable for their feeding 
([ualities. Many years elapsed, however, before any signs of degeneration 
declared themselves; eventually the animals became smaller, less fecund and 
the strain lost its once appreciated cjualities. Consequently, there are now 
very few animals retaining the "Express" blood at the Mayeda Farm, most 
of them having been eliminated. 
Recently I paid visits to this farm and to a number of breeders who 
have once introduced the "Express" blood in their herds, and endea- 
voured to collect some accurate details on the inheritance of the aural ab- 
normality. 
The genealogical table accompanying this paper has been compiled 
either by studying the breeding books kept at the Mayeda Farm or by ex- 
amining the living animals. All the cases, where there has been the least 
doubt as to the individual being normal or abnormal, have been excluded in 
the table. The normals are represented by white circles and the abnormals, 
whose type is unknown, by shaded circles. In the case of such abnormals, 
as I have been able to verify myself by actual examination of the individuals, 
I have preferred to distinguish the well-nicked type (the first type) and the 
slightly-nicked type (the second type) with black circles and black semi- 
circles respectively. In the table, the two lines coming together at the top 
of an individual trace respectively to the sire and dam, while the lines from 
the foot of the individual run to the offspring. 
Owing to the lack of attention paid to this peculiarity on the part of 
the breeders, who regarded its inheritance as common rather than occasional, 
only a few records telling of this abnormality have come to my knowledge. 
As a matter of fact, the data thus far collected are decidedly fragmentary, 
but enough has been given to show the persistence with which the abnormali- 
ty was transmitted. 
In all cases cited in the table it must be admitted that the aural abnor- 
mality is inherited only from the abnormals and never from normals. An 
