the external reproductive organs of male sharks, rays and chimaeras 
Appendages at the end of the abdomen of males to secure the female during mating
modifications of the male elasmobranchs pelvic fins that are rod-like and are used to transfer sperm during mating. 
The abdominal and anal segment legs.
The sex organs for male members of Chondrichthyes, used for the passing of sperm to a female's organs. All elasmobranchs have interenal fertilization. The claspers (or lack of) are one of the major physical indications as to the sex of a shark and are found just behind the pelvic fin. Although there ar e two claspers, only one is used at a time.
the external reproductive organs of male sharks, rays and chimaeras
The two rolls of cartilage found near the pelvic fins of sexually mature male sharks. They serve to guide the sperm into the female’s cloaca during mating.