| OCR Text |
Show 334 MR. W. WOODLAND ON THE [Apr. 21, the competency of this alleged cause, contemplation of the actual locomotion of a horse or dog, or reference to the works of Marey, Pettigrew, and others will soon dispel it. Further, I have shown that the degree of transposition of the testes corresponds Text-fig. 57. CLUPEA SCYLLIUM TRITON RANA LACERTACOLUMBA MUS FEL! Diagram illustrating Testis Descent. This diagram, based on a series of measurements, illustrates the positions and lengths of the testes relatively to the length of the trunk proper (minus tail) in Clupea, Scyllimn, Triton, Bana, Lacerta (muralis), Cohimba, the common mouse, and the cat, all measurements being reduced to one scale. The vertical sides of the rectangle represent the length of the animal to which the other measurements are proportional, and the dots the approximate positions of the centres of gravity of the testes. Such a figure well exhibits the concentration and transposition corresponding to higher grades of impulsiveness. To fully illustrate the relationship a similar diagram drawn up from several hundred dissections is necessary, together with the average weight of the testis and intensity of the reactions incurred in locomotion, appended in the case of each animal. |
