Prehen'sile (L. pri-hendo, I lay hold of). Adapted for catching 

 hold of objects, as are the tails of some apes. 



Prehen'sion (L. prchendo, I lay hold of). The act of laying 

 hold of objects. 



Premaxilla (L. prce, before; maxilla, the jaw-bone). A bone 

 developed on each side of the middle line between the 

 nose and the anterior boundary of the mouth ; represented 

 in Human Anatomy by the incisor part of the superior 

 maxillary bone. 



Pre'puce ") (L. prceputium, the foreskin). The anterior part 



Prepu'tium ] of the integument of the penis. 



Pres'byopy (Gr. presbus, old j opsis, sight). The condition of 

 " long sight," so called because this defect of vision is 

 usually an accompaniment of old age. 



Pre'sphenoid (L. prce, before ; sphenoid bone). A bone deve- 

 loped in some Vertebrata in front of the sphenoid bone of 

 the skull ; represented in Human Anatomy by the anterior 

 part of the body of the sphenoid bone. 



Prima'tes (L. primus, first). The highest division of the Ver- 

 tebrata. 



Pri'mine (L. primus, first). The outer coat of the ovule of a 

 plant. 



Primordial (L. primordius, original, first in order). Original, 

 first-formed. 



Primor'dial u'tricle (L. primordius, original ; utriculus, a little 

 bag, the bud or envelope of a flower). The outer layer of 

 the protoplasm of a cell. 



Probosci'dea (Gr. proboskis, proboskidos, a snout, trunk). A 

 group of mammals which includes the elephants and other 

 animals provided with trunks. 



Procepha'lic lobes (Gr. pro, in front of, before ; ktphale, the 

 head). Two lobes in the embryo of the Podophthalmia 

 which subsequently develope into the anterior parts of the 

 head. 



Proce'rebnun (Gr. pro, in front of; L. cerebrum, the brain). 

 The fore-brain, comprising the cerebral hemispheres, cor- 

 pora striata, and olfactory lobes. 



Pro'cerite (Gr. pro, before ; Kcras, a horn). The last segment 

 of the antennae in the Crustacea, 



Pro'cess (L. processus, a going forward). A term applied to 

 any outgrowth or projection of bone or other tissue. 



Proces'sus a cerebel'lo ad ce'rebrum (L. process from the 

 cerebellum to the cerebrum). A white cord passing on 



