Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and raysJohn Tee-Van Sears Foundation for Marine Research, Yale Univ., 1953 |
Dall'interno del libro
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Pagina 231
... nearly mature males mostly in straight series ( not in quincunx ) , with small base , circular or oval , those in median sector of mouth with slender sharp cusp pointing toward symphysis or inward toward throat , those in outer sector ...
... nearly mature males mostly in straight series ( not in quincunx ) , with small base , circular or oval , those in median sector of mouth with slender sharp cusp pointing toward symphysis or inward toward throat , those in outer sector ...
Pagina 507
... nearly ver- tical on sides of head ; upper margins about level with midpoint of front of head ; lower origin on side of head about level with lower surface of head and a little posterior to eye ; lower edges thin , upper edges thick ...
... nearly ver- tical on sides of head ; upper margins about level with midpoint of front of head ; lower origin on side of head about level with lower surface of head and a little posterior to eye ; lower edges thin , upper edges thick ...
Pagina 547
... nearly straight along rear part of trunk , descending at origin of caudal fin to follow out along lower edge of caudal axis ; junction of cranial canal with aural canal somewhat more acute than a right angle ; anterior course of cranial ...
... nearly straight along rear part of trunk , descending at origin of caudal fin to follow out along lower edge of caudal axis ; junction of cranial canal with aural canal somewhat more acute than a right angle ; anterior course of cranial ...
Sommario
SAWFISHES GUITARFISHES SKATES and RAYS | 1 |
Suborder Myliobatoidea | 331 |
Dasyatis say | 378 |
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Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1953 |
Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1948 |
Parole e frasi comuni
Acad Amer axils of pectorals batoids Bigelow and Schroeder biol Brazil breadth Bull Carolina cartilage caudal fin center of cloaca Chesapeake Bay claspers Coast color comp concave Copeia Dasyatis Dermal denticles descr distance between inner dorsal fin embryos Evermann exposed nostrils eyes fathoms female Florida Fowler front of mouth front of orbits Garman genus gill openings Gulf Gulf of Maine Harv Hist inner ends Jersey Jordan Lacépède length of base Linnaeus listed lobe long as distance Lower surface mature males Müller and Henle Narcine nasal curtain pectoral fins pelvic fins Philad Poiss posterior margin prickles Proc Raja rearward Rio de Janeiro rostral rounded Sawfishes side Skates spiracles Study Material tail spine teeth thorns tip of snout tip of tail Torpedo transverse Trygon type species U. S. Bur U. S. Comm U. S. nat upper surface Woods Hole Zool