GLOSSARY. 345 



Poi/-T-zo-A'Ki-Tra:. The dermal system of the aoloaj o{ & PblyzoSn (= I'olypi- 

 dom). 



Poe-oel-la'ite-ods. Of the texture of porcelain. 



Po-bif'e-ka (Lat. porus, a pore ; a,aAfero, I carry. Sometimes used to desig- 

 nate the Forarmnifera, or the Sponges. 



Post'a-nal (Lat. ^05*, behind; anus, the fundament). Situated behind the 

 anus. 



Postxe-so-phao'e-al (Gr. oisopTiagos, the gullet). Situated behind the gullet. 



Post-o'bal (Lat. os, mouth). Situated behind the mouth. 



PE.E-MAX-iLLiB. (<Sf«« IntcrmaxiUae.) 



Pb^-mo'laes (Lat. prae, before ; molareSj the grinders). The molar teeth of 

 Mammals which succeed the molars ot the milk-set of teeth. In man, the 

 bicuspid teeth. 



Pb^-ce-so-phag'e-al. Situated in front of the gullet. 



Pk^-stek'num ((ir. sternon, the breast). The anterior portion of the breast- 

 bone, corresponding with the manuiriiim sterni of human anatomy, and 

 extending as far as the point of articulation of the second rib. 



Pebs-si-eos tees (Lat. pressus, compressed ; rostrum, beak). A group of the 

 Grallatorial Birds. 



Peob-os-oid'e-a (Lat. prdb scis, the snout). The order of Mammals com- 

 prising the Elephants. 



Pbo-eos CIS (Lat. or Gr. for the snout). Applied to the spiral trunk of Zepidop- 

 terous Insects, to the projecting mouth of certain Onnoids, and to the cen- 

 tral polypite in the Medwsce. 



Peo-oce'lous (Gr. pro, in front ; Jcoilos, hollow). Applied to vertebra, the 

 bodies of which are hollow or concave in front. 



Peo-glot'tis (Gr. for the tip of the tongue). The generative segment or joint 

 of a Tape-worm. 



Pbo'legs. The false abdominal feet of Caterpillars. 



Peo-na'tion (Lat. pronus, lying on the face, prone). The act of turning the 

 palm of the hand downward. 



Pbo-po'di-dm (Gr. pro, before; pons, foot). The anterior part of the foot in 

 Molluscs. 



Pbo-soo'lex (Gr. pro, before ; scolex, worm). The first embryonic stage of a 

 Tape-worm. 



Peos-o-bban-ohi-a'ta (Gr. proso, in advance of; hragchia, gills). A division 

 of Gasteropodous Molluscs in which the gills are situated in advance of the 

 heart. 



Pbo-so'ma (Gr. pro, before : soma, body). The anterior part of the body. 



Peo-tho'eax i^Gr. pro; and thorax, chest). The anterior ring of the thorax 

 of insects. 



Peo-toph'y-ta (Gr. protos, first ; andpfmton, plant). The lowest division of 

 plants. 



Peo'to-plasm (Gr. protos ; and plasso, I mould). The elementary basis of 

 organized tissues. Sometimes used synonymously for the " sarcode " of 

 the Protozoa. 



Peo-top'o-ditk {dr. protos ; and pons, foot). The basal segment of the typi- 

 cal limb of a CruAacean. 



Peo-to-2o'a (Gi. protoe / and zocn, animal). The lowest division of the ani- 

 mal kingdom. 



PEO-VEN.TEio'u-i,ua(Lat. pro, in front oi\ventriculus, dim. of venter, beUy). 

 The cardiac portion of the stomach of Birds. 



Pbox'i-mal (Lat. proximus, next). The slowly-growing, comparatively-fixed 

 extremity of a Imib or of an organism. 



Psal-te'ei-om (Lat. for a stringed instrument). The third stomach of Eu- 

 mlnants. (See Omasum.) 



Pseu-dem'bet-o (Gr. pseuaes, false ; erribruon, embryo). The larval form of 

 an Echmoderm. 



Pbec-do-bean'ohi-a (Gr. pseudes, false ; bragahia, gills). A supplementary gill 

 found in certain fishes, which receives arterialized blood only, and does 

 not, therefore, assist in respiration. 



