BALANOGLOSSUS. 



163 



Fig. 95. — Anatomy of Balanoglossus (Diagrammatic). 

 A B 



^ Neive Plexus. Prob9scis 

 Cavity. 

 ^^ ^ ' Pericardium 



U 



Subneural 

 Ventral [Gland. 

 Mesentery. 



Central 

 ^ Nerve Cord. 

 Dorsal 



Mesentery. 



Collar 

 Cavity 

 Ventral 

 Mesentery. 



Dorsal 

 Blood-vessel. Dorsal 



Nerve. Respiratory 

 /-•11 CIV >^^ \ ] (^"^-^ part of 

 Gill Slit., X \ \ / rV„.\^ Intestine. 



> 



Ventral Blood- 

 vessel. 



Ventral Nerve Cord. 



A, Median sagittal section. B, Transverse section of proboscis. C, Transverse 

 section of collar. D, Transverse section of trunk. 



