PLATE V 



THE UROGENITAL ORGANS OF CHLAMTDOSELACHUS 

 Fig. 17- External (ventral) vie.w of the cloaca, and abdominal apertures in a normally developed male. 



d, cloaca; po, poms abdominalis; ug, urogenital openings; v, vent. 



After Giinther, 1S87, Fig. 1, pi. LXV. 



Fig. 18. External (ventral) view of the cloaca and abdominal apertures in an asymmetrically developed 

 male. The ducts of the right side are not so well developed as those of the left. 



d. cloaca; po, poms abdominalis; ug, urogenital openings; v, vent. 



After Giinther, 1887, Fig. 2, pi. LXV. 



Fig. 19. Side view of the ductus deferentia (vasa deferentia) of a specimen with unequal development of 

 the genital ducts. Compare preceding figure, drawn firom the same specimen. 



gi, gland; i, rectum opened; po, porus abdominalis; r, kidney; u, urinary bladder; ug, right, and ugl, left urogenital 

 opening; vd, left, and udl, right ductus deferens. 



After Gunther, 1887, Fig. 3, pi. LXV. 



Fig. 20. Ventral view of pelvic fins, myxopterygia and cloacal aperture of a 1474'mm. male. 



Aft^ Giinther, 1887, Fig. C, pi. LXIV. 



Fig. 21 . Dorsal view of the right half of the pelvic girdle and endoskeleton of the right pelvic fin of a male. 



B., basipterygium; b., axial cartilage; bl, intercalary cartilage; Be. [beta], modified radial; I.n./., longitudinal nerve 

 foramen; p.g., pehnc girdle; r., lateral radials; R-i., marginal ventral cartilage; T.d., terminal dorsal cartilage; T.d., 

 terminal ventral cartilage. 



After Goodey, 1910.1, Fig. 22, pL XL VI. 



Fig. 22. Dorsal view of the pelvic fin and the right half of the pelvic girdle of a male, showing musculature. 

 A., adductor muscle; B., basipterygium; Be.fbeta], modified radial; c.n., collector nerve; D., dilator muscle; Fl.e., 

 musculus flexor extemus; Fi.i., musculus flexor intemus; I.r., last lateral radial; O., dorsal radial muscles; p.g., pel- 

 vic girdle; R.V., marginal ventral cartilage; S., compressor muscle; T.d., terminal dorsal cartilage; T.v., terminal 

 ventral cartilage. 



After Goodey, 1910.1, Fig. 20, plate XL VI. 



Fig. 23. Ventral view of the pelvic fin represented in Figs. 21 and 22, showing muscles. 



Fl.e., musculus flexor extemus; Ra., ventral radial muscles; S., compressor muscle; T.v., terminal ventral cartilage. 

 Aft^r Goodey, 1910.1, Fig. 21, pL XL VI. 



