nerve-fibrils

When the knobbed end of the balancers of the horsefly (_Tabanus atratus_, Comstock) [19] are examined with the microscope, the cuticle will be found to be set with minute hairs or setæ; some of these hairs penetrate both cuticle and hypoderm, are hollow, and receive into their hollows delicate nerve-fibrils.

The Dawn of Reason or, Mental Traits in the Lower Animals

I have observed that each of these nerve-fibrils swells into

The Dawn of Reason or, Mental Traits in the Lower Animals

I think that the worm is enabled to tell the difference between light and darkness through the agency of these minute dark spots, which serve to arrest the rays of light, thus conveying a stimulus to nerve-fibrils, which, in turn, carry it to the sensorium.

The Dawn of Reason or, Mental Traits in the Lower Animals

These nerve-fibrils pass inward toward the centre, and enter ganglia, which in turn are in immediate connection with the great nerves of the balancers.

The Dawn of Reason or, Mental Traits in the Lower Animals