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"Nervous System of the Aplysia, a Gasteropodous Mollusc: c, cerebral ganglia; g, thoracle or sub-aesophageal ganglia; o, nervous collar surrounding the aesophagus; l, labial ganglia; v, visceral ganglion." — Chambers, 1881

Aplysia Nervous System

"Nervous System of the Aplysia, a Gasteropodous Mollusc: c, cerebral ganglia; g, thoracle or sub-aesophageal…

"Diagram of the arterial system of A, Scorpio, and B, Limulus. The Roman numerals indicate the body somites and the two figures are adjusted for comparison. ce, Cerebral arteries; sp, supra-spinal or medullary artery; c, caudal artery; l, lateral anastomotic artery of Limulus. The figure B also shows the peculiar neural investiture formed by the cerebral arteries in Limulus and the derivation from this of the arteries to the limbs, III, IV, VI, whereas in Scorpio the latter have a seperate origin from the anterior aorta." — The Encyclopedia Britannica, 1910

Arterial System

"Diagram of the arterial system of A, Scorpio, and B, Limulus. The Roman numerals indicate the body…

"Vertical and Longitudinal section through skull of Castor Fiber, showing the cerebral cavity, the greatly-developed turbinal lamellae, the mode of implantation of the large over-growing chisel-edged incisor, and the curved rootless molars." —The Encyclopedia Britannica, 1903

Castor Fiber

"Vertical and Longitudinal section through skull of Castor Fiber, showing the cerebral cavity, the greatly-developed…

Diagram of the motor tract as shown in a diagrammatic horizontal section through the cerebral hemispheres Crura, Pons, and Medulla. Fr., frontal lobe; Oc., occipital lobe; AF., ascending frontal, AP., ascending parietal convolutions; PCF., pre-central fissure in front of the ascending frontal, AP., ascending parietal convolution; FR., fissure of Rolando; IPF., interparietal fissure, a section of crus is lettered on the left side. SN., substantia nigra; Py., pyramidal motor fiber, which on the right is shown as continuous lines converging to pass through the posterior limb of IC. internal capsule ( the knee or elbow of which is shown thus) upwards into the hemisphere and downwards through the pons to cross the medulla in the anterior pyramids.

Cerebral Hemisphere

Diagram of the motor tract as shown in a diagrammatic horizontal section through the cerebral hemispheres…

The inner wall of the nasal fossae, or septum of the nose.

Nasal Fossae

The inner wall of the nasal fossae, or septum of the nose.

This illustration shows the base of the skull. The inner or cerebal surface.

Skull

This illustration shows the base of the skull. The inner or cerebal surface.

This illustration shows the external surface of the skull.

Skull

This illustration shows the external surface of the skull.

This illustration shows the anterolateral region of the skull.

Skull

This illustration shows the anterolateral region of the skull.

The coronal section through the frontal sinus and nasal fossa.

Skull

The coronal section through the frontal sinus and nasal fossa.