142 HERPETOLOGY AND ICHTHYOLOGY .GLOSSARY. 



laying hold of, and conveying food 

 to the mouth. 



PRE-OPERCULUM. A part of the gill- 

 cover. 



PRISTIS. Latin. Generic name of 

 the saw-fish. 



PROCESS. From the Latin, procedo, 

 1 go before. An eminence of bone; 

 a bony projection. 



PRO'TKUS. From the Greek, protos, 

 first. Name of a particular reptile. 



PROTRA'CTILE. Susceptible of being 

 extended or stretched out. 



PTERODA'CTYLUS. From the Greek, 

 pteron, wing, and daktulos t finger. 

 Name of a fossil. 



PTER'VGOID. ter'-e-goid. From the 

 Greek, pterux, wing, and eidos, 

 resemblance. Name of a bone 

 which is connected to the palate 

 bones. 



PU'LMONARY. Belonging or relating 

 to the lungs. 



PUPIL. The aperture of the iris, 

 through which the rays of light 

 pass, that have to paint the image 

 of an object on the retina. 



PYGM.EUS. Latin. Small, little, 

 dwarfish, pi^my. 



PYLO'RUS. From the Greek, pule, 

 gate, and ouros, a guardian. The 

 right orifice of the stomach. 



PYTHON From the Greek, puthon, 

 a serpent. Generic name of cer- 

 tain ophidians. 



QUADRANGULAR. From the Latin, 

 quatuor, four, and angulus, angle. 

 Having four angles or sides. 



RADIUS. Latin. A spoke. One of 

 the bones of the fore-arm, so called 

 from its shape. 



RAIA. ry-a. Latin. A ray-fish. 



RANA. Latin. A frog. 



REG'IMEN. From the Latin, regere, 

 to govern. The rational and metho- 

 dical use of food, and every thing 

 essential to life ; both in a state of 

 health and disease. It is often re- 

 stricted in its meaning to diet, 



REMO'RA. Latin. A hindrance. The 

 name of a fish. 



REPTI'LE. From the Latin, repere, 

 to crawl. An animal that crawls, 



that drags itself along on its belly 

 like serpents and worms, Also 

 applied to animals that have legs 

 so short that they seem to crawl. 



RESP'IRATION. From the Latin, res- 

 piro, I take breath. A function 

 proper to animals, the object of 

 which is to place the materials of 

 the blood in contact with atmos- 

 pheric air, in order that it may 

 acquire the vivifying qualities that 

 belong to arterial blood. Aquatic 

 animals find sufficient air for their 

 respiration, mixed with, or dissolved 

 in the water. 



RET'INA. From the Latin, rete, a 

 net. The essential organ of vision, 

 situated within the eye-ball : on it 

 the images of objects are impressed. 



RETRA'CTILE. Susceptible of being 

 drawn back. 



RHOMBOIDAL. Lozenge-shaped. 



SACRUM. Latin. Sacred. The bone 

 which forms the posterior part of 

 the pelvis, and is a continuation of 

 the vertebral column. 



SAI.AR. Specific name of the salmon. 



SALI'VA. Spittle. 



SALI'VARY. Belonging or relating to 

 saliva. 



SALMO. Latin. A salmon. 



SALMONI'DES. Systematic name of a 

 family of fishes. 



SARDINA. Latin. A sardine. 



SARGUS. Latin. Name of a fish. 



SAU'RIA. From the Greek, sourer, a 

 lizard. Systematic name of an 

 order of reptiles. 



SAURIAN. Any reptile of the order 

 of sauria. 



SAUVEGARDE. French. Name of a 

 saurian. 



SCAPULA. The shoulder-blade. 



SCHIST. From the Greek, schizcin, 

 to divide. A sort of stone which 

 separates into leaves or plates like 

 slate, but not to the same extent. 

 A generic name given by geolo- 

 gists to all minerals which split or 

 divide into very thin plates. 



SCIENOFDES. Systematic name of a 

 family of fishes. 



