. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. GIGANTOCYPRIS MULLERI 231 They soon give off branches to the labral glands (Fig. 14). From the labral ganglion a small nerve runs downwards towards the tip of the labrum (Figs. 11, 12). It supplies various dilator muscles of the mouth region and then ends in a small distal labral ganglion. Dorsally the labral ganglion sends off two nerves. Of these the anterior runs up to the ganglion which in Doloria I have termed the stomach ganglion. I call it the labral connec- tive. In Doloria this nerve pa
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. GIGANTOCYPRIS MULLERI 231 They soon give off branches to the labral glands (Fig. 14). From the labral ganglion a small nerve runs downwards towards the tip of the labrum (Figs. 11, 12). It supplies various dilator muscles of the mouth region and then ends in a small distal labral ganglion. Dorsally the labral ganglion sends off two nerves. Of these the anterior runs up to the ganglion which in Doloria I have termed the stomach ganglion. I call it the labral connec- tive. In Doloria this nerve passes through the frontal foramen of the brain (Cannon, 1931, p. 471). In Gigantocypris there is no such fora- men, but in the homologous position the nerve sends forwards a small twisted median nerve, the aortic connective, which joins directly the hinder wall of the brain (Fig. 12). It is possible that this connective is also present in Doloria but that I could not find it on account of its size. From Fig. 12 it will be seen that the upper part of the labral con- nective runs close underneath what may be termed the floor of the aorta, that is, the lower median wall where the aorta bifurcates immediately behind the brain. Just at the junction where the aortic connective emerges from the labral connective a nerve is given off which immediately penetrates the aortic floor and branches into a plexus which spreads over the latter. The terminations of this plexus can be seen with certainty ending against the flattened nuclei in the neigh- bouring aortic walls. The labral connective shows a series of at least three swellings. Between the upper two a branch. Fig. 16. Oblique view of nervous system and ganglia of nauplius eye, based on an isometric projection, to show the extent and arrangement of visceral nervous system. All nerves behind the antennal have been omitted, aortic ganglion; /./. labral loop of visceral system; ganglion of lateral component of nauplius eye; tn
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