No. 2.] 



THE HYPOPHYSIS OF A. MIA CALVA. 



79 



ABBREVIATIONS. 



A. anterior. 



ao. outfold of ectoderm caused by t lie- 

 developing adhesive organ. 



/>;. wall of brain. 



bv. blood vessels. 



c. cavity occupied by adhesive organ 

 in its young stages. 



ch. chorda. 



chh. cephalic end of the chorda. 



cc. ectoderm. 



egm. egg membrane. 



ii. epithelium of mouth. 



t-n. endoderm. 



L-p. epiphysis. 



fg. foregut. 



fv. first primary vesicle of brain. 



//. position of heart. 



lib. third primary vesicle of brain. 



hy. hypophysis. 



in. infundibulum. 



/. lumen of hypophysis. 



Ipo. lamina postoptica. 



Is. crystalline lens. 



ni. mouth cavity. 



nib. mesencephalon. 



HIS. mesoderm. 



o. involution of ectoderm between 



the sucking discs. 

 t'< . optic chiasma. 

 op. oral plate. 

 ov. optic vesicle. 

 P. posterior. 

 pf. point of fusion of ectoderm with 



endoderm. 



;(>. recessus opticus. 

 .r. strand of fibrous tissue continuous 



with the perichondrium. 

 jr. sucking cup. 

 sk. skeletal cartilages. 

 si. cleft between rows of cells. 

 st. stomodaeum. 

 s-c'. saccus vasculosus or infundibular 



gland. 



7'. internal carotid artery. 

 v'. head cavities. 

 y. yolk. 



