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
Risultati 1-3 di 88
Pagina 383
... embryos lie bathed in a creamy yellow fluid which is probably secreted by the villi and which seemingly provides nourishment to the embryo in addition to that provided from the yolk sac , for the large intestine of larger embryos has ...
... embryos lie bathed in a creamy yellow fluid which is probably secreted by the villi and which seemingly provides nourishment to the embryo in addition to that provided from the yolk sac , for the large intestine of larger embryos has ...
Pagina 398
... embryos in the uterus , one is rolled up around the other , head to head , in such a way that the spiracles of the inner member of the pair are exposed for the reception of the uterine villi . In one pair of embryos so entwined , one of ...
... embryos in the uterus , one is rolled up around the other , head to head , in such a way that the spiracles of the inner member of the pair are exposed for the reception of the uterine villi . In one pair of embryos so entwined , one of ...
Pagina 425
... embryos are a little broader than those of adults . Embryos also differ from their parents in their wholly naked skins ( see pp . 419 , 422 ) . However , the most interesting embryonic feature is the presence of a well developed fleshy ...
... embryos are a little broader than those of adults . Embryos also differ from their parents in their wholly naked skins ( see pp . 419 , 422 ) . However , the most interesting embryonic feature is the presence of a well developed fleshy ...
Sommario
SAWFISHES GUITARFISHES SKATES and RAYS | 1 |
Suborder Myliobatoidea | 331 |
Dasyatis say | 378 |
10 sezioni non visualizzate
Altre edizioni - Visualizza tutto
Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1948 |
Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Anteprima non disponibile - 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