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class of fishes, comprising the sharks, the rays, and the Chimæra. The skeleton is mainly cartilaginous.

A cartilaginous tumor growing from the interior of a bone. Quain.

The bony, cartilaginous, or other internal framework of an animal, as distinguished from the exoskeleton.

A ventral cartilaginous or bony element of the coracoid in the shoulder girdle of some vertebrates.

A cartilaginous lidlike appendage which closes the glottis while food or drink is passing while food or drink is passing through the pharynx.

ion of the vomer and the base of the ethmoid in the skull. Ethmovomerine plate (Anat.), a cartilaginous plate beneath the front of the fetal brain which the ethmoid region of the skull is developed.

Partly fibrous, partly cartilaginous, and partly osseous. St. George Mivart.

An organ of a fish, consisting of a membrane supported by rays, or little bony or cartilaginous ossicles, and serving to balance and propel it in the water.

or that is attached by one side or end and is easily moved; as, the flap of a garment. A cartilaginous flap upon the opening of the larynx. Sir T. Browne.

Consisting of, or containing, gristle; like gristle; cartilaginous.

A slender bony or cartilaginous process developed from the heel bone of bats. It helps to support the wing membranes. See Illust. of Cheiropter.

Of or pertaining to the bony or cartilaginous arch which supports the tongue. Sometimes applied to the tongue itself. Hyoid arch (Anat.), the arch of cartilaginous or bony segments, which connects the base of the tongue with either side of the skull. -- Hyoid bone (Anat.), the bone in the base of the tongue, the middl…

A nitrogenous substance resembling vitellin, present in the egg yolk of cartilaginous fishes.

en crura; -- applied especially to the interneural plates in the vertebral column of many cartilaginous fishes.

A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii.

rtaining to, or discovered by, J. F. Meckel, a German anatomist. Meckelian cartilage, the cartilaginous rod which forms the axis of the mandible; -- called also Meckel's cartilage.

d to invertebrates it is usually the same as ventral. Cf. Hemal. Neural arch (Anat.), the cartilaginous or bony arch on the dorsal side of the centrum of the vertebra in a segment of the spinal skeleton, usually inclosing a segment of the spinal cord.

The bony cranium, as distinguished from the cartilaginous cranium.

Situated on either side of the notochord; -- applied especially to the cartilaginous rudiments of the skull on each side of the anterior part of the notochord. -- n.

he pectoral sandpiper. Pectoral arch, or Pectoral girdle (Anat.), the two or more bony or cartilaginous pieces of the vertebrate skeleton to which the fore limbs are articulated; the shoulder girdle. In man it consists of two bones, the scapula and clavicle, on each side. -- Pectorial cross (Eccl.), a cross worn on th…