^NATION "i ri \ li 



ao. 1 ' f/i. Not-. 



<///>. F.pithclial lining of li. . Mesentery. 



,-de-pl.itc. m ,'<> the liiu 



Primitive ovum. //. Il.-ly -ca\i' d tube. 



;il swelling, vcau. C . .r. SU!M. : i rod. 



i. Transverse M-ction through ti 

 between K and I.. ZdM I'-, ex ni. :. i ,nl. 



The section illustrates the junction of a sympathetic ganglion with a - 

 ami the sprouting of the muscle-plates into the- limbs (/////). 



:. Transverx- section through the abdominal region of an 



I B, ocul. 1. Reduced one-third. 



The section illustrates the junction of a sympathetic gangli 

 and also the commencing formation of a branch from tl. 

 pass through the sympathetic ganglion, and forms the first >ign of tl. 

 of part of a sympathetic ganglion into one of the suprarenal bodies. 



3. Longitudinal and verti- >f an embryo of a stage between L and 



M, shewing the successive junctions of the spinal nerves and sympathetic ganglia. 



Fig. 4. Section through the solid oesophagus during stage L. Zeiss A, ocul. i. 

 The section is taken through the region of the heart, so that the cavity of the auricle 

 (aur) lies immediately below the oesophagus. 



Fig. 5. Optical section of the tail of an embryo between stages 1 and K, shewing 

 the junction between the neural and alimentary canal-,. 



Fig. 6. Four sections through the caudal region of an embryo belonging t< 

 K, shewing the condition of the postanal section of the alimentary tract. Zeus A, 

 ocul. 2. An explanation of these figures is given on p. 449. 



Fig. 7. Section through the interrenal body of a Scyllium embryo belon- 

 stage Q. Zeiss C, ocul. 2. 



Fig. 8. Portion of a section of the interrenal body of an adult Scyllium. 

 C, ocul. 2. 



EXPLANATION OF I 1 1. ATI: 19, i\. p. *(>.) 



COMIM in Lisi 01 



Nervous Syst, 

 //.Nerve. sf>n. Spinal nerve, sy g. Sympathetic ganglion. 



y Canal. 



d. Cloaca. inch Cloaca! involution. cctf. al epithelium. 



Pancreas, th. Thyroid body. 



Gfntral. 



abp. Abdominal p<>'ket 

 Caudal vein. /)'. I.ymphoid tissue, m i. Mu^-le^. ,.;'. Kidm r. 



H. IV. 



