GL088ABT. 



279 



CE-soph'a-gtjs (Gr. oisos, a reed ; 

 phagein, to eat). The gullet. 



ON-TOG'B-NY(Gr. on, ontos, being; 

 ffena, birth). The development 

 from the egg, of an individual 

 animal. 



O-PBR'cu-LtrM (Lat. op&rio, to 

 covei). In fishes one or more 

 ■bones covering the gills ; in 

 Gastropod mollusks a horny 

 plate or solid limestone mass 

 closing the orifice of shells. 



0-pib-tho-coe'lous (Gi-. opistlten, 

 behind ; kmlos, hollow). Those 

 vertebrates with bodies hollow 

 behind and convex in front. 



O'kal. Belated to the mouth. 



Ok-ni-tho-dbl'ph i-a (Gr. ornis, 

 bird : delphus, womb). The 

 sub class of mammals and or 

 der Monotremata. 



Or-thop'te-ra (Gr. orthos, 

 straight ; pteron, wing). The 

 order of insects with straight 

 narrow fore-wings, as the grass- 

 hoppers. 



Os-tra'co-da (Gr. oatracodet, 

 shelled). A group of shelled 

 Crustacea. 



O'to-liths (Gr. oits, ear ; Ufhos, 

 stone). Small bones suspended 

 in the internal ear of fishes, or 

 concretions in the auditory 

 sacs of invertebrates. 



0-viP'AROtJS (Lat. ovum, an egg; 

 pario, I bring forth). Applied 

 to animals bringing forth eggs 

 instead of living, active young. 



0-vi-pos'i-TOR (Lat. ovum, an 

 egg; pono, I place). An organ 

 in insects homologous with the 

 sting, by which eggs are de- 

 posited in solid substances. 



0' VI- SAC. A sac or bag-like mem- 



brane attached to the parent, 

 and containing eggs. 

 O-vo-vi-vip'a-rous (Lat. ovum, 

 an egg; viviis, alive; pario, I 

 bring forth). Applied to such 

 animals as retain their eggs in 

 the body until they are hatched. 



P.a; DO gen'e-sis. Parthenoge- 

 nous development in larval in- 

 sects. 



Pal'li-um (Lat. a cloak). The 

 mantle or body-wall of mol- 

 lusks, which secretes the shell ; 

 adj. pallial. 



Pa-pil'la. a minute soft projec- 

 tion. 



Pa-ren'ohy-ma (Gr. paregchuma, 

 from para, en, ehvo, something 

 poured in besides). Applied 

 to the proper substance of vis- 

 cera, excluding connective tis- 

 sue, blood-vessels, and other 

 accessory parts. 



Par-the-no gen'e-sis (Gr. par- 

 iJienos, virgin; genesis, genera- 

 tion). Reproduction by direct 

 growth of germs from the egg, 

 without fertilization by male 

 germs or spermatozoa, as in the 

 aphis, gall-insects, fluke-worm, 

 etc. 



Pel'a GIG. Living on the high 

 seas, away from the coast; in 

 raid-ocean. 



Per'-i-somb (Gr. peri, around; 

 soma, body). In Crinoids the 

 oral region of the cup or body. 



Pbr-bn-ni-bran'chi-a-ta (Lat. 

 perennis, perennial; iranchia, 

 gill). ThoseBatrachia which re- 

 tain their gills throughout life. 



Pbris-so dac'tt-la (Gr. perissos, 

 uneven; dakiulos, finger). 



