EXPLANATION OF PLATE I. 

 After E. E. Pkince. 



Fig. 1. Transverse section (malo (laxtcro.^tcufi kjk) of renal mass, \irinai"y 

 bladder, etc., in situ, X l-W diameter. A, kidneys (coalesced portion) : «, a. 

 right and left ureters passing longitudinally along outer ventral borders of 

 kidneys ; h, urinary tubules, mudei of epithelial cells indicated. B, urinary 

 bladder, behind the cervix: <i, epithelial; h. fibrous layer; c, c, right and left 

 ureters (on opposite sides of bladder) ; d, contained thread-like secretion from 

 kidneys ; C, intestine ; D, D', testes. 



Fig. 2. Fragment of hyaline capsule of ovum, showing tlie rows of jjits and 

 lamella?, X 300. 



Fig. 3. Fragment of hyaline capsule of ovum, in transvei'se section, showing 

 luunerous lamelUe, X 350. 



Fig. 4. Portion of mucous secretion, showing funicular structure, X 350. 



Fig. 5. Sketch of nest (diagrammatic), one-third natural size, the pockets 

 containing ova exposed. <l (i, transeversely arranged intersecting threads ; 

 h, h, masses of ova contained in the interspaces of nest. 



Fig. G. Dissection of male, showing viscera of posterior portion of abdominal 

 cavity, about natural size, a, enlarged urinary bladder ; h. left flexure of urin- 

 ary bladder (cervix) ; c, right flexure of urinary bladder (near posterior term- 

 ination) ; (7, genital pore; e, cloacal depression; /', anus; r/, urinary aperture; 

 /(, alimentary canal; i, i, right and left testes; j, j, kidneys; j', ureters; 7c, 

 swim bladder. 



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