Johnston, Giant Ganglion Cells. 381 



'98. Sargent. The Giant Ganglion Cells in the Spinal Cord of Ctenolabrus 



coeruleus Stoier. Anat. Anz., Bd. 15. 

 '95. Studnicka. Ein Beitrag zur vergleichenden Histologie und Histogenese 



des RUckenmarkes. Sitzungsber. Kgl. b6hm. Gesell. Wiss. (Prag), math.- 



naturw. Kl., Jahrg. 1895, ^o- 5' ! Review in : Jour. Comp. Neur., 



Vol. 6. 

 '98. Tagliani. Ueber die Riessennervenzellen im Riickenmarke von Solea 



impar. Anat. Anz., Bd. 15. 



DESCRIPTION OF FIGURES. 

 Abbreviations. 

 a. — auditory sac. 

 ac. — tuberculum acusticum. 

 f.— central process of spinal ganglion cell. 

 ch. — notochord. 

 d. — dendrites. 

 e. — epithelial cells. 

 /. — dorsal tracts of cord. 

 ^.— giant cells. 

 /M.— body muscles. 

 med. — medulla. 



n. n^. — rostral and caudal neurites, respectively. 

 /. — peripheral process of spinal ganglion cell. 

 sp <■.— spinal cord. 

 sp. g. — spinal ganglion cell. 

 A'. /. /. — lateral line VII nerve. 

 An arrow indicates the cephalic direction in each drawing. 



PLATE XXIV. 



Fig. I. Horizontal section of part of medulla and spinal cord of Cato- 

 stomus embryo 10 days after fertilization. 



Fig. 2. Sagittal section of the medulla and cord of a l2-day Catostomus 

 embryo, showing twenty giant cells and several dendrites whose cells are not 

 impregnated. The segments A, B, and Care successive and continuous. 



Fig. J. Horizontal section of the cephalic part of the cord of a 12-day 

 Catostomus embryo. 



Fig. ^. Sagittal section of part of the cord of an 18-day Catostomus em- 

 bryo. Camera drawing. 



Fig. 5. Horizontal section of part of the cord of a 19-day Catostomus 

 embryo. 



PLATE XXV. 



Fig. 6. Horizontal section of the cephalic half of the cord of a ■19-day 

 Catostomus embryo. B continues immediately after A. 



Fig. y. Sagittal section of part of the cord of a 26-day Catostomus em- 

 bryo. Cahiera drawing. 



Fig. 8 Horizontal section of part of the cord of a Coregonus embryo 

 shortly after hatching. 



Fig. p. Sagittal section of a part of the medulla and cord of a Coregonus 

 embryo shortly after hatching. The cell marked thus (?) probably is not con- 

 nected with the dendrite with which it appears to be in connection, but un- 

 derlies it. 



