10 



MR. C. TATE REGAN ON THE 



c. YiscERA (text-fig. 6). 



Air-blarldev («.), alimentary canal, kidneys (^.), etc., as in the 

 female, except that the intestine (i.) and ui'eter (u.) end in 

 the pviapium. 



The intestine (J.) enters the priapinm near the posterior end 

 'of its junction with the body (text-fig. 5), a,nd runs downwards, 

 somewhat forwards, and across to the proctal side, ending at the 

 anus. 



The ureter (m.) enters the priapium just below and behind the 

 intestine (text-fig. 5 B) and runs downwards into the middle of 

 the priapium and across until it meets the enlarged part of the 

 vas deferens, here running backwards on the proctal side ; the 

 ureter now runs upwards and backwards and towards the proctal 

 side, always in contact with the vas deferens, and ends by opening 

 into the efferent groove, not far from the proximal end of the 

 latter (text-fig. 7 A). 



Text-figure 6. 



Visceral uiuitoiny of Neostethus lankesteri, S (X 8). From the proctal side; 



the liver, etc., removed. 



oe., OBSOphagus; «., stomach; L, intestine; k., kidney; «., ureter; t., testis; 



vd., vas deferens ; a,, air-bladder. 



The testis (i.) is unpaired (text-fig. 8 A) and coiresponds to the 

 ovary in form and position ; the vas deferens (v.cZ.) arises from the 

 middle of the upper surface of the testis and runs forwards, at 

 first at the side of the intestine and then partly above it ; it 

 curves downwards to enter the priapium just behind and on the 

 aproctal side of the intestine, and runs downwards and a little 

 backwards until it reaches the terminal style of the axial bone ; 

 the vas deferens runs across to the proctal side below this bone 

 and then expands to form the large terminal coil that runs back- 

 wards, then across, and then upwards and forwards, ending in 

 the seminal papilla. 



