QLOSSABT. 



693 



OviPAKOUS (Lat. ovum, an egg ; 

 pano, I bring forth). Applied 

 to animals bringing forth eggs 

 instead of living, active young. 



Ovipositor (Lat. omtm, an egg ; 

 pono, I place). An organ in in- 

 sects homologous with the sting, 

 by which eggs are deposited in 

 solid substances. 



Ovisac. A sac or bag-like mem- 

 brane attached to the parent, 

 and containing eggs. 



Ovo-vrviPAEOus (Lat. ovum, an 

 egg ; i)iBus, alive ; pario, I bring 

 forth). Applied to such animals 

 as retain their eggs in the body 

 until they are batched. 



Pallium (Lat. a cloak). The man- 

 tle or body-wall of moUusks, 

 which secretes the shell ; adj. 

 pallial. 



Parenchyma (Gr. paregchumci, 

 irompara, 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 ; S077ia, 

 body). In Crinoids the oral re- 

 gion of the cup or body. 



Perreitoibranchiata (Lat. per- 

 ennis, perennial ; branchia, gill). 

 Those Batrachia which retain 

 their gills throughout life. 



Perissodacttla (Gr. perissos, nn- 

 , even ; daktulos, finger). Those 

 Ungulates with an uneven num- 

 ber of toes, as the horse. 



Pbritonedm (Gr. peri, around ; 

 teino, I stretch). The membrane j 



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. 



PoLYPiDB or Polypite. The 

 separate animals of a Hydro- 

 zoon. 



PREOEi\i. In front of the mouth. 



Process, A projection ; used 

 chiefly in osteology. 



Proccelous (Gr. pro, front ; koilos, 

 hollow). Those vertebras con- 

 cave or hollow in front. 



Protoplasm (Gr. protos, first ; 

 plasma, from plnsso, I mould). 

 The albuminous, elementary 

 matter forming cells and the 

 body-substance of Protozoa. 



Proximal (Lat. proximus, next). 

 The fixed end of a limb, bone or 

 appendage ; that nearest the 

 body , opposed to distal, the 

 farther end. 



Pseudopodia (Gr. pseudes, false ; 

 podss, feet). The temporary pro- 

 cesses sent out from the- bodies 

 of Protozoa. 



Ptbropoda (Gr. pteron, wing ; 

 podes, feet). A class of pelagic 

 mollusks. 



Pubescent. Coated with very 



fine hairs. 

 Punctured. Marked with nu- 

 merous small impressed dots. 

 Pupa (Lat. a doll). The third or 



