. The elasmobranch fishes . y -*~\ â â \ V X A B Fig. 253. Urogenital system, Squalus suckJii. (Duncan Dunning, orig.) A. Female. B. Male. cl, cloaca; els., clasper; , dorsal aorta; M., kidney; od., oviduct; ov., ovary; so., in male, sperm sac; , shell gland; t., testis; u., ureter; up., urinary papilla; , urinary sinus; uterus; urogenital sinus; , vesieula seminalis; , vas deferens; ted., Wolffian duet.

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