252 VOCABULARY. 



types are now generally combined in one order named Pri- 

 mates, under which head man and the monkeys are com- 

 bined together in one sub-order (An'thropoidea), and con- 

 trasted with the lemurs, which constitute another sub-order 

 (Prosimise). Theodore Gill. 



R. 



RECTUM. The third and last portion of the great intestine. It 

 forms the continuation of the sigmoid flexure of the colon, 

 occupies the posterior part of the pelvis, and extends from 

 the sacro- vertebral articulation to the coccyx (rump or crup- 

 per bone), before which it opens outward by the orifice called 

 the 'anus.' 



REG'IME. Mode of living ; government, administration. 



REG'IMEN. The rational and methodical use of food and of 

 everything essential to life, both in a state of health and dis- 

 ease. It is often restricted in its meaning to ' diet.' It is 

 sometimes used synonymously with hygiene (health). 



RU'MINANT. A division of animals having four stomachs, the 

 first so situated as to receive a large quantity of vegetable 

 matter coarsely bruised by a first mastication, which passes 

 into the second, where it is moistened and formed into little 

 pellets ; these the animal has the power of bringing again to 

 the mouth, to be rechewed, after which it is swallowed into 

 the third stomach, from which it passes into the fourth, 

 where it is finally digested. Webster. 



(Several well authenticated cases of human beings who 

 ruminated their food are on record.) 

 S. 



SARCO'MA. Any species of excrescence having a fleshy consist- 

 ence. 



SCHNEIDERIAN MEMBRANE. See ' Pituitary membrane.' 



SCLEROT'IC. A heavy, resisting, opaque membrane, of a pearly 

 white color and fibrous nature, which covers nearly the pos- 

 terior four-fifths of the globe of the eye, and has the form of 

 a sphere truncated before. 



SELLA TUR'CICA. (Turkish saddle.) A depression at the upper 

 surface of the sphenoid bone, which is bounded, anteriorly 

 and posteriorly, by the clinoid processes, and lodges the pitu- 

 itary gland. It is so called from its resemblance to a Turkish 

 saddle. 



