The Morphology of Cosmobia 



]9: 



shown in profile in Fig. 21. If in a human cyclops one should be 

 disposed to doubt that the cliaracteristic supra-orbital process is really 

 a nose, the fact is corroborated by this specimen, for here this process 

 has taken on the unmistakable character of a pig's snout. This snout 

 is covered dorsally and proximally by a single median nasal bone, ac- 

 companied at its outer proximal angles by a pair of small lacrimals. 

 The palpebral opening, placed immediately beneath this snout, is pro- 

 longed laterally into angles, the outer canthi, and discloses an oval 

 eyeball. 



The dissection of this eyeball and its associated parts was accomplished 

 in the usual way by first removing the skull-cap, then the brain, and 

 lastty the bony roof of the single orbit. The accompanying sketches 



Fig. 21. Cyclops pig ; Teras VII. 



will illustrate the most important of the relationships found. The 

 large round nasal fossa of normal pigs is here much reduced, yet still 

 transmits a pair of branches from the Trigeminus, the anterior nasal 

 nerves. Behind this is a single median optic foramen, and behind this 

 again a pair of supra-orbital fissures [sphenoidal]. The single pair of 

 foramina behind these latter, which represent a confluence of the fora- 

 mina rotundum and ovale, is the normal condition in the pig, and in 

 general from this point posteriorly there is nothing unusual about the 

 specimen. The superficial portion of the orbito-sphenodd , which 

 separates the optic foramen from the supra-orbital fissure, also serves 

 as a point of origin for certain miiscles of the eyeball, which may be 

 seen in part through the large optic foramen. After the removal of this 

 Y-shaped piece the three openings involved become confluent and appear 

 as a single opening in the form of an inverted heart, framed in by the 

 prce- and orbito-sphenoids, and by the orbital plates of the frontal. A 



