GLOSSARY. 



693 



OVIPAKOUS (Lat. ovum, an egg 

 pario, I bring forth). Appliec 

 to animals bringing forth eggs 

 instead of living, active young. 



OVIPOSITOR (Lat. ovum, an egg 

 pono, I place). An organ in in- 

 sects homologous with the sting, 

 by which eggs are deposited in 

 solid substances. 



O vis AC. A sac or bag-like mem- 

 brane attached to the parent, 

 and containing eggs. 



OVO-VIVIPAROUS (Lat. ovum, an 

 egg ; vivus, alive ; pario, I bring 

 forth). Applied to such animals 

 as retain their eggs in the' body 

 until they are hatched. 



PALLIUM (Lat. a cloak). The man- 

 tle or body-wall of mollusks, 

 which secretes the shell ; adj. 

 pallial. 



PARENCHYMA (Gr. paregchuma, 

 from para, en, chuo, something 

 poured in besides). Applied to 

 the proper substance of viscera, 

 excluding connective tissue, 

 blood-vessels, and other accesso- 

 ry parts. 



PELAGIC. Living on the high 

 seas, away from the coast ; in 

 mid-ocean. 



PERISOME (Gr. peri, around ; soma, 

 body). In Crinoids the oral re- 

 gion of the cup or body. 



PERRENNIBRANCHIATA (Lat. per- 

 ennis, perennial ; branchia, gill). 

 Those Batrachia which retain 

 their gills throughout life. 



PERISSODACTYLA (Gr. penssos, un- 

 even ; daktulos, finger). Those 

 Ungulates with an uneven num- 

 ber of toes, as the horse. 



PERITONEUM (Gr. peri, around ; 

 teino, I stretch). The membrane 



lining the abdominal walls and 

 covering the enclosed viscera. 

 PERIVISCERAL (Gr. peri, around ; 

 Lat. viscera, the internal organs, 

 especially of the abdominal cav- 

 ity). The body-cavity contain- 

 ing the alimentary canal with 

 its outgrowths. 

 PICEOUS. Pitchy ; the color of 



pitch ; shining reddish black. 

 PILOSE. Clothed with pile, or 



dense short down. 

 PLEXUS (Lat. a knot). Applied 

 to a knot-like mass of nerves 

 or blood-vessels. 



POLYPIDE or POLYPITE. The 

 separate animals of a Hydro- 

 zoon. 



PREORAL. In front of the mouth. 

 PROCESS. A projection ; used 



chiefly in osteology. 

 PROCOELOUS (Gr. pro, front ; koilos, 

 hollow). Those vertebrae con- 

 cave or hollow in front. 

 PROTOPLASM (Gr. protos, first ; 

 plasma, from plasso, I mould). 

 The albuminous, elementary 

 matter forming cells and the 

 body-substance of frotozoa. 

 PROXIMAL (Lat. praximus, next). 

 The fixed end of a limb, bone or 

 appendage ; that nearest the 

 body ; opposed to distal, the 

 farther end. 

 PSEUDOPODIA (Gr. pseudes, false ; 

 podes, feet). The temporary pro- 

 cesses sent out from the bodies 

 of Protozoa. 



PTEROPODA (Gr. pteron, wing ; 

 podes, feet). A class of pelagic 

 mollusks. 



.PUBESCENT. Coated with very 

 fine hairs. 



UNCTURED. Marked with nu- 

 merous small impressed dots. 

 PUPA (Lat. a doll). The third or 



