The Anatomy of Chlamydoselachus 433 



smaller than the left. There is no urinary papilla. The rectal portion of the cloaca is 

 very short. 



A ventral view of the cloaca of Carman's (1885.2) adult female specimen of Chlamy 

 doselachus is shown in his PI. XII, reproduced here as Text'figure 89. There is no line 

 of demarcation between urogenital and rectal portions of the cloaca (cL). There is only 



Urogenital system of the female Chlamydo' 



selachus, ventral views, one-fifth natural size. 



The shell-glands and the adjoining portions of 



the oviducts are displaced laterally. 



Text-figure 87- Urogenital organs of a speci- 

 men 1350 mm. long. The right uterus and 

 ovary are incomplete. 



ah. p., right abdominal pore (the left is closed superfici- 

 ally); c.t., collecting tubule; m., mesonephros; mes.i., 

 mesonephric duct; mso., mesovarium; ond., oviduct; ovy., 

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

 ur.p., urethral pores; ut., uterus; v.l., ventral Hgament 



of the oviduct. 



Drawn from specimen No. I in the American Museum 



of Natural History. 



Text-figure 88. Urogenital organs of a speci- 

 men 1485 mm. long. A segment has been 

 excised from the right uterus, and the right 

 ovary is incomplete. The excretory ducts are 

 not shown. 



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

 ovy., ovary; r., rectum; s.g., shell gland; ur.p., urethral 

 pores; ut., uterus; v.l., ventral ligament of the oviduct. 

 Drawn from specimen No. II in the American Museum 

 of Natural History 



Text-figure 87- 



Text-figure 



one urethral aperture; this (u.a.) is rather large and its position is median. Carman 

 states that "there is no appearance of a urethral papilla ; the anterior border of the opening 

 is inflated into a flap or valve, which closes the opening against objects passing outward 

 through the cloaca, or better, which is made to close it by the object themselves." 



Hawkes (1907) has represented the cloaca of her female specimen of Chlamydoselachus 

 by a diagram which is reproduced as my Text'figure 90a. She notes that there are two 



