374 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 



Spinous. Stiff or composed of spines. 



Striate. Striped or streaked. 



Suborbital. The bone immediately below the eye. 



Supraoccipital. The bone at posterior part of skull. 



Suture. The line of union of two bones, as in the skull. 



Symphasis. The tip of chin; point of juncture of the two bones of lower 



jaw. 

 Synonym. A different word having the same meaning; a technical 



name given to a fish already described is said to be a synonym. 

 Synonymy. A list of technical names applied to a certain genus or 



species. 



Tail. In ichthyology the part posterior to the anal fin. 

 Temporal. Referring to the region of the temples. 

 Terete. Cylindrical or tapering. 

 Thoracic. Pertaining to the thorax; said of the ventral fins when 



attached beneath the pectorals. 

 Trenchent. Compressed to a sharp edge. 

 Truncate. With a square or straight margin. 

 Tubercle. A small projection, like a pimple. 

 Type. The particular specimen upon which the original description of 



the species was based or the species upon which was based the genus 



to which it belongs. 

 Type locality. The particular place or locality at which the type was 



collected. 



Vent. The posterior opening of the alimentary canal. 

 Ventral. Relating to the abdomen. 

 Ventral fins. The paired fins behind, in front of or below the pectoral 



fins, corresponding to the hind limbs in the higher vertebrates. 

 Ventral plates. The plates lying on the belly. 

 Vertical fins. The fins on the median line of the body; the dorsal, 



caudal and anal fins. 

 Villiform. Slender, minute teeth crowded into compact patches or 



bands. 



Viviparous. Bringing forth living young. 

 Vomer. A bone in the center of the roof of the mouth, just behind the 



premaxillaries, often bearing teeth. 



