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Pagina 6
Of these primary gill openings , only the second to ninth persist , however . After
the formation of the primary series of gill openings the number of segments
increases at the posterior end of the body , the final number being attained early
in ...
Of these primary gill openings , only the second to ninth persist , however . After
the formation of the primary series of gill openings the number of segments
increases at the posterior end of the body , the final number being attained early
in ...
Pagina 64
Development either oviparous , ' ovoviviparous , ' or viviparous ; * embryos with
transitory external gills . ... Gill openings at least partly lateral ; edges of pectoral
fins not attached to sides of head anterior to gill openings ; upper margin of orbit ...
Development either oviparous , ' ovoviviparous , ' or viviparous ; * embryos with
transitory external gills . ... Gill openings at least partly lateral ; edges of pectoral
fins not attached to sides of head anterior to gill openings ; upper margin of orbit ...
Pagina 77
6 or 7 gill openings . 3a . Margins of ist gill openings not continuous across throat
; upper and lower teeth notably unlike toward center of mouth . Notidanoidea , p .
77 . 3b . Margins of ist gill openings continuous across throat ; upper and lower ...
6 or 7 gill openings . 3a . Margins of ist gill openings not continuous across throat
; upper and lower teeth notably unlike toward center of mouth . Notidanoidea , p .
77 . 3b . Margins of ist gill openings continuous across throat ; upper and lower ...
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Sommario
LANCELETS By Henry B BIGELOW and Isabel PÉREZ FARFANTE | 1 |
CYCLOSTOMES BY HENRY B Bigelow and WILLIAM C SCHROEDER | 29 |
SHARKS BY HENRY B BIGELOW and William C SCHROEDER | 59 |
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Altre edizioni - Visualizza tutto
Fishes of the Western North Atlantic: Editorial Board: Editor-in ..., Parte 4 John Tee-Van Visualizzazione frammento - 1948 |
Fishes of the Western North Atlantic, Edizione 1,Parte 3 John Tee-Van Visualizzazione frammento - 1948 |
Parole e frasi comuni
2nd dorsal abund Acad Amer anal appears Atlantic base Bermuda biol breadth Brit broad Bull Carcharias caudal Characters close coast Comp concave considerably Copeia corner Cuba cusps descr developed distance dorsal fin edges embryos Fauna feet female Fish Florida Fowler front of mouth furrow genus gill openings Gulf habits Harv head Hist ident inner Island Jersey Jordan known larger latter least length less listed lobe lower male margin moderately mouth nearly North nostrils origin outer pectoral pelvics Philad Poiss posterior probably Proc range rear record References relatively reported ridges rounded Second dorsal seen separate Shark side slightly snout South southern species specimens Squalus Stewart Springer taken teeth tooth total length Trunk U.S. Comm U.S. nat upper vertical height West western Woods Hole York Zool