USED IN NATURAL HISTORY. 



123 



PROCKSSIONWE'A. Lat. That goes 

 in procession. 



PRocu'MBENT.-Lying on the ground. 



PRO'CYOX. Lat. A raccoon. 



PROD'ROMUS. fr. gr. pro, before; 

 dromos, a course. That which 

 precedes another. 



PRODC'CED. Lengthened out. 



PRODU'CTUS. A genus of extinct 

 bivalve mollusks. (fig. 9, 10, p. 

 30, Book viii). 



PROGXA'THIC. > fr. gr. pro, in front ; 



PROOXA'THOUS. \ gnathos, the jaw. 

 Having the face or jaws project- 

 ing forward. 



PROGNOSTIC. fr. gr. pro, before; 

 ginosko, I know, I judge. A con- 

 jecture or opinion of what is yet 

 to happen. 



PROGRE'SSIOX. fr. lat. pro, before ; 

 gradus, a pace or step. A move- 

 ment in advance, a going for- 

 ward. The movement of pro- 

 gression is peculiar to animals 



PROJE'CTILE. fr. lat. projicere, to 

 throw in advance, or to a dis- 

 tance. Any heavy body thrown 

 into the air, and abandoned to the 

 action of its own weight. That 

 which is capable of being cast or 

 thrown forward. Having the 

 power of sudden extension. 



PROIEGS. The wart-like tubercles 

 which represent legs on the hin- 

 der segment of caterpillars. 



PROM'FETIOUS. fr. lat. proles, off- 

 spring; /ere. to bear. Applied to 

 a flower which produces another 

 flower from its centre. 



PROLI'GEROUS. fr. lat. proles, a race ; 

 gero, I bear. Applied to that part 

 of the egg in which the embryo 

 is placed. The proligerous disc. 

 Germinative disc. JBlastoderma. 

 Germinal membrane. Germ. 



PROPA'GO. The branch laid down 

 in the process of layering. 



PROPA'GULUM. An offset. 



PROPENDEXT. Hanging forward 



and downward. 



PBOPO'LIS fr. gr. pro, before ; polls, 

 a city. A kind of cement ob- 



tained by bees from certain flow- 

 ers, which they use to close the 

 external openings of their hive. 



PROSE'XCHTMA. That form of pa 

 renchyma in plants, in which the 

 cells taper to each end and over- 

 lap each other; parenchyma being 

 restricted to that form of the tis- 

 sue, in which the cells have trun- 

 cated extremities. 



PRO'TEUS. fr. gr. protos, first. Name 

 of a particular reptile. 



PROTHO'R*X. The first ring of the 

 thorax of insects. 



PROTOZO'IC STSTKM fr. gr. proton, 

 first; zoon, an animal. A geolo- 

 gical term, applied to the lowest 

 system of rocks in which the 

 traces of any organic structure 

 have been found. 



PROTRA'CTILE. Susceptible of being 

 extended or stretched out. Ca- 

 pable of extending itself. 



PROVEXTRI'CULUS. fr. lat. pro, be- 

 fore; ventriculus, a little stomach. 

 The second stomach of birds. 



PRU'NUS. Lat. A plum tree. 



PSALTE'RIUM. A name of the third 

 stomach of ruminants. 



PSAMMO'BIA. fr. gr. psammos, sand. 

 A genus of bivalves. 



PSKUDOMO'RPHOUS. fr. gr. pseudcs, 

 false ; morphc, form. Applied to 

 substances which, not possessing 

 a crystalline structure, are found 

 in the form of regular crystals. 



PSEUDO-PI WXATE. Falsely or im- 

 perfectly pinnate; not resolving 

 at any time into separate leaflets. 



PSEUDO-STRATA. Table layers. Ex- 

 tended plates df rocks, not di- 

 vided into parallel laminae. 



PSIT'TACUS. fr. gr. psittakos. a par- 

 rot. Systematic name of parrots. 



PSO'PHIA. fr. gr. psophia, I make a 

 noise. Systematic name of the 

 trumpeters. 



PTERI'CHTHTS. fr. gr. pteron, a 

 wing; ichihos, a fish. A genus of 

 fossil fishes, (fig. 20, p. 32, Book 

 viii). 



PTERO'CEBA. fr. gr. pteron, wing. 



