Archive image from page 34 of A description of the fossil. A description of the fossil fish remains of the Cretaceous, Eocene and Miocene formations of New Jersey descriptionoffos00fowl Year: 1911 ELASMOBRANCHIL 29 posteriorly along longitudinal surfaces, former not very high and latter shallow. Lower surface of base flat. Length (width) 16 mm. Fig. 3.—Acrodus humilis Leidy. ' (Type.) I, upper view; 2, lateral view; 3, end view; 4, enlarged 4x. Formation and locality. I have examined only the above ex- ample, the type ascribed to the 'limestone from the New Jersey cretaceous,' from Vincent
Archive image from page 34 of A description of the fossil. A description of the fossil fish remains of the Cretaceous, Eocene and Miocene formations of New Jersey descriptionoffos00fowl Year: 1911 ELASMOBRANCHIL 29 posteriorly along longitudinal surfaces, former not very high and latter shallow. Lower surface of base flat. Length (width) 16 mm. Fig. 3.—Acrodus humilis Leidy. ' (Type.) I, upper view; 2, lateral view; 3, end view; 4, enlarged 4x. Formation and locality. I have examined only the above ex- ample, the type ascribed to the 'limestone from the New Jersey cretaceous,' from Vincentown, in Burlington County [The Vin- centown formation, K]. Sub-Order GALEI. THE TRUE SHARKS. Gill-openings 5, always lateral. Palato-quadrate apparatus not articulated with skull. Dorsal fins 2, well developed, each without spine. This group contains the greater number of existing and fossil families of sharks. Family GINGLYMOSTOMIDtE. THE NURSE SHARKS. Eyes very small. Upper and lower lips developed, latter not extending across symphysis. Nasal and buccal cavities confluent. Nasal valves at both sides form one quadrangular flap before mouth, and each provided with a free cylindrical cirrus. Spiracle
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