. The elasmobranch fishes. Chondrichthyes. 142 THE ELASMOBRANCH FISHES ABDOMINAL POEES The abdominal pores in the Elasmobranchs may perforate the tips of the papillae or, as was just said, they may pass through the cloaeal pits. Some of the types having perforated papillae are Triakis semifasciatus, Carcharias glaucus, Zygaena, Mustelus. In some the papillae are imperforate (Squatina). The slit-like type of abdominal pores is in connection, not with the papillae, but with the cloaeal pits. This type is especially common among the Please note that these images are extracted from scanned

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. The elasmobranch fishes. Chondrichthyes. 142 THE ELASMOBRANCH FISHES ABDOMINAL POEES The abdominal pores in the Elasmobranchs may perforate the tips of the papillae or, as was just said, they may pass through the cloaeal pits. Some of the types having perforated papillae are Triakis semifasciatus, Carcharias glaucus, Zygaena, Mustelus. In some the papillae are imperforate (Squatina). The slit-like type of abdominal pores is in connection, not with the papillae, but with the cloaeal pits. This type is especially common among the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Daniel, J. Frank (John Franklin), 1873-1942. Berkeley,Calif. , University of California press

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