432 



Bashford Dean lAemorial Volume 



In specimen No. I, which is fully mature, the urogenital sinus (Text'figure 87) is 

 still slightly constricted where it joins the rectal portion of the cloaca, but the openings 

 of the uteri are readily visible and are indicated by line^shading in the figure. The right 

 uterus has a much larger opening than the left. There are two urethral pores (ur.p.), 

 right and left, and these are situated close together near the posterior end of the dorsal 



Text-figure 85. 



Text-figure 86. 



Urogenital system of the female ChlamydoseP 

 achus, ventral views, one-fifth natural size. 



Text-figure 85. Urogenital organs of a specimen 



1398 mm. long. The excretory ducts are 



concealed by the oviducts. 



ah. p., abdominal pore; m., mesonephros; ovd., oviduct; 

 ovy., ovary; r.cl., rectal portion of the cloaca; ug.s., open- 

 ing from the urogenital sinus; v.l., ventral ligament of 



the oviduct. 



Drawn from specimen No. IV in the American Museum 



of Natural History. 



Text-figure 86. Urogenital organs of a specimen 

 1550 mm. long. The shell glands and the 

 adjacent portions of the oviducts are displaced 

 laterally, and the excretory ducts are not shown. 



ab.p., abdominal pore; m., mesonephros; ovd., oviduct; 

 ovy., ovary; r.cl., rectal portion of the cloaca; s.g., shell 

 gland; ur.p., urethral pore; ut., uterus; v.]., ventral ligament 



of the oviduct. 



Drawn from specimen No. Ill in the American Museum 



of Natural History. 



surface of the urogenital sinus. The right urethral aperture is decidedly smaller than the 

 left and is situated a little further posteriorly. There is no urinary papilla. 



In specimen No. II, which is fully mature, almost the entire urogenital sinus (Text- 

 figure 88) seems built around the very large opening of the right uterus, indicated by line- 

 shading in the figure. In the hardened condition of the material, this opening is still 

 large enough to admit a thumb. The opening of the left uterus is much smaller. There 

 are two urethral orifices, right and left, situated about 4 mm. apart near the center of the 

 dorsal surface of the urogenital sinus. The right urethral aperture (ur.p.) is somewhat 



