“…Where the clasper exits the pelvic scroll, a cavernous muscular siphon sac extends laterally from the clasper groove. The siphon sacs are confined to the claspers, similar to that found in Chtamydosetachus anguineus (Leigh-Sharpe, 1926;Gilbert, 1943) The night shark is found in tropical waters of both the eastern and western Atlantic (Raschi et a/., 1982). In the western Atlantic it is reported from the east coast of the United States, through the Antilles, to southern Brazil, and is most common off Cuba and southern Florida (Compagno, 1978b).…”