Herrick, Nerves of Stluroid Fishes. 249 
fig. g. Similar transection farther caudad (6.6 millimeters from the tip 
of the snout) X 28. The plane of the section is just proximal to the point 
where the supero-lateral and infero-medial strands are rearranged to form the 
maxillary and mandibular nerves. 
Fig. 5. Similar transection farther caudad (at 7 millimeters) x 28. At 
this plane the infero-medial and supero-lateral strands are passing through their 
foramen in the cranium. 
fig. 6. Similar transection farther caudad (at 7.3 millimeters) x 28. This 
level lies at the point of origin of the r. palatinus posterior and immediately 
cephalad of the origin of the hyomandibular trunk (cf. Fig. 2). 
fig. 7. Similar transection farther caudad (at 8.3 millimeters) x 28. The 
section passes through the ganglionic root of the r. lateralis accessorius. 
Fig. 8. Similar transection farther caudad (at 8.7 millimeters) x 28. The 
section lies just caudad of the superficial origin of the trigeminus from the 
oblongata. 
Fig.g. Similar transection farther caudad (at 10.4 millimeters) X 28. 
Shows the superficial origins of the communis and motor roots of the vagus and 
the passage of the glossopharyngeus through its foramen in the cranium. 
PLATE XVII. 
Fig. 10. Transection similar to the last and still farther caudad (at 10.7 
millimeters), passing through the jugular ganglion of the vagus. 28. 
fig. 77. Section through a terminal bud in the skin of the top of the 
head. X 560. 
Fig. 72. Section through a small pit organ in the skin of the top of the 
head. X 560. 
Fig. 13. Section through a large pit organ from the top of the head, the 
innermost organ of the nasal pit-line, Fig. 1. X 560. The section is taken to 
one side of the middle of the organ and so does not show the largest extent of 
the organ nor the nerve supplying it. The small pear cells are seen among the 
outer ends of the supporting cells and just extermal to the organ is a ‘‘cupula”’ 
composed doubtless of disintegrated hairs from the pear cells. 
Fig. 14. Sketch of the right side of a large specimen of Ameiurus melas, 
showing the pores of the lateral line canals and some of the large pit organs. 
31 2-5: 
