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554 



Bashford Dean Memorial Volume 



diameter". This very great expansion is clear in his figure which, however, is so poorly 

 printed on soft paper that it cannot be reproduced here. 



Smith dissected and figured the reproductive organs of two sexually mature frilled 

 sharks measuring 1350 and 1485 mm. respectively. He does not give measurements of the 

 oviducts but Text'figures 14 and 15 give the relative si2,es of the oviducts and other organs. 



Urogenital system of the female Chlamydo' 



selachus, ventral views, one-fifth natural si2;e. 



The shell glands and the adjoining portions of 



the oviducts are displaced laterally. 



Text-figure 14. 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.d., 

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

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

 ur.p., urethral pores; ut., uterus; v. I., ventral ligament 



of the oviduct. 



Drawn from specimen No. I in the American Museum 



of Natural History. 



After Smith, 1937, p. 433. 



Text-figure 14. 



Text-figure 15. 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; 

 oily., 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. 

 After Smith, 1937, p. 433. 



These fish had evidently been gravid and the enlarged right uterus of each had been opened 

 and the eggs removed. These adults (and probably the eggs also) came to Dean — presum' 

 ably at Misaki, or were later sent to him in America. 



In Dean's notebook is a rough sketch of the reproductive apparatus of his huge I960' 

 mm. female. This shows the two ovaries with many eggs (elsewhere referred to) and two 

 empty uteri — the right twice as large as left. (Here recall Smith's drawing, my Text- 



