160 KIOHARD EVANS. 



happen to illustrate the difference in appearance existing between a contracted 

 and a non-contracted appendage, 



Pjg. 7. — Tills figure shows the structure of the foot. There are two 

 primary papillae on the anterior aspect, but only one on the posterior. On 

 the ventral aspect there are two pairs of elevations, every elevation carrying 

 three spines, which is the maximum number that was observed. 



Fig. 8. — This figure shows a primary papilla from a position midway 

 between the appendages and the mid-dorsal line. 



Fig. 9. — This figure represents the posterior end of the male type specimen 

 dissected from the ventral surface. It shows the male generative system, 

 consisting of two tubular testes {(s.), two oval-shaped vesicula; seminales 

 {v. s.), two short vasa deferentia (v. d.), and a long and coiled ejaculatory duct 

 {ej. d.), together with a pair of male accessory glands (m. a. g.). 



Fig. 10. — This figure represents the posterior end of the female type 

 specimen dissected from the ventral surface. It shows the female generative 

 organs, consisting of an elongated ovary attached to the floor of the peri- 

 cardium by a fine cord, receptacula seminis and ovorum, and two uteri [id.), 

 which contain young in different stages of development. 



Fig. 11. — This figure illustrates the ovary {ov), the receptacula ovorum 

 {re. 0.), the receptacula seminis {re. s.), and the commencement of the uteri 

 («/.) of the female. 



