Fishes of the Western North Atlantic: LanceletsSears Foundation for Marine Research, Yale Univ., 1948 |
Dall'interno del libro
Risultati 1-3 di 32
Pagina 67
... ovoviviparous in the majority and truly viviparous in still others . In the first type the horny egg capsules usually ( but not always ) bear long tendrils at the corners at one or both ends , by which they are attached to algae , etc ...
... ovoviviparous in the majority and truly viviparous in still others . In the first type the horny egg capsules usually ( but not always ) bear long tendrils at the corners at one or both ends , by which they are attached to algae , etc ...
Pagina 78
... ovoviviparous . Families . One modern family known , Hexanchidae . Family HEXANCHIDAE Characters . Either 6 or 7 gill openings ; margins of all gill openings widely inter- rupted at throat ; eyes without nictitating folds or membranes ...
... ovoviviparous . Families . One modern family known , Hexanchidae . Family HEXANCHIDAE Characters . Either 6 or 7 gill openings ; margins of all gill openings widely inter- rupted at throat ; eyes without nictitating folds or membranes ...
Pagina 116
... ovoviviparous species , the young lying free in the uterus without connection with the mother . It also seems estab- lished that in nasus , contrary to the rule among most other ovoviviparous sharks , the yolk sac is absorbed and the ...
... ovoviviparous species , the young lying free in the uterus without connection with the mother . It also seems estab- lished that in nasus , contrary to the rule among most other ovoviviparous sharks , the yolk sac is absorbed and the ...
Sommario
LANCELETS BY HENRY B BIGELOW and ISABEL PÉREZ FARFANTE I | 1 |
CYCLOSTOMES BY HENRY B Bigelow and WILLIAM C SCHROEDER | 29 |
SHARKS BY HENRY B BIGELOW and WILLIAM C SCHROEDER | 59 |
Copyright | |
5 sezioni non visualizzate
Parole e frasi comuni
1˝ as long 2nd dorsal Acad Amer anal Anal fin atriopore Aust biol Brazil Brit Bull Carcharhinus Carcharias Carolina Caudal fin Caudal peduncle coast Comp concave convex Copeia corner of mouth Cuba cusps Dermal denticles descr diameter of eye distal margin distrib dorsal fin embryos Fauna feet female Fish Florida Fowler front of mouth Garman genus gill opening Gulf of Maine Harv Hist horizontal diameter inner corner inner margin Interspace Jersey labial furrow length in front length of base lobe long as base lower teeth Medit Müller and Henle myotomes North nostrils origin of pectoral outer margin ovoviviparous Pectoral fin Philad Poey Poiss posterior margin precaudal pit Proc Rafinesque refs ridges Second dorsal Shark snout in front specimens spiracles Squalus Stewart Springer total length type species U.S. Bur U.S. Comm U.S. nat upper tooth vertical height Woods Hole Zool zygaena