498 



H. W. NORRIS AND SALLY P. HUGHES 



nas.^tmx. ^^ ^ 



' op.2v. 



-Id. 



op.2v 



"as.-Dm» -OP.Sb 



\_ max. 



Figs. 1 to 4 Cross-sections through the head, left half, upper jaw, of Herpele 

 ochrocephalum-; anterior nasal region; sections 52, 66, 74 and 85 in fig. 44. 

 X 12.5. 



and Geotrypetes that, on the entrance of the ventral olfactorius 

 into the brain, bundles of fibers ascend into the dorsal glomeruli. 

 That the dorsal division sends fibers into the ventral glomeruli 

 is not so clear, but apparently this occurs in Herpele. The ar- 

 rangement of the olfactory glomeruli in the caecilians is in two 

 groups, not, however, dorsal and ventral as Burckhardt assumes, 

 but in a posterior lateral group and an anterior medial and lateral 

 group. From the former arise the fibers that supply Jacobson's 

 organ. These latter, with fibers from the anterior glomeruli, 



