PLATE II 



Fig. i. Fully extruded penis of a Fin whale 20-0 m. in length. The 

 genital slit (penis sac) and accessory genital grooves are seen. The ter- 

 minal cone occupies about the distal half of the organ. In the stretched 

 condition of the penis the praeputial fold is not well seen. 



Length of penis ... ... ... ... ... ... 1-96 m. 



Length of terminal cone ... ... ... ... 0-90 m. 



Distance from centre of anus to centre of base of penis 1-54 m. 



Fig. 2. External genitalia of a female Fin whale 22-62 m. in length. 

 This shows the usual undistended condition of the parts. 



Distance from centre of anus to centre of vulva 0-64 m. 



Distance between the nipples ... ... ... 0-35 m. 



