GLOSSARY. 345 



POL-Y-ZO-A'RI-UM. The dermal system of the colony of a Polyzoon (= Polypi- 

 dom). 



POR-CEL-LA'NE-OUS. Of the texture of porcelain. 



PO-RIF'E-RA (Lat. porus, a pore ; and /era, I carry. Sometimes used to desig- 

 nate the Forarmnifera, or the Sponges. 



POST'A-NAL (Lat. post, behind ; amis, the fundament). Situated behind the 

 anus. 



POST-OE-SO-PHAG'E-AL (Gr. oisophagos, the gullet). Situated behind the gullet. 



POST-O'RAL (Lat. os, mouth). Situated behind the mouth. 



PR.E-MAX-IL L,E. (See Intennaxillae.) 



PR^E-MO'LARS (Lat. prae, before ; molares, the grinders). The molar teeth of 

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

 bicuspid teeth. 



PR.E-(E-SO-PHAG'E-AL. Situated in front of the gullet. 



PR^E-STER'NUM (Gr. sternon, the breast). The anterior portion of the breast- 

 bone, corresponding with the manubrium sterni of nunian anatomy, and 

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



PREs-si-RoaTRES (Lat. presses, compressed ; rostrum, beak). A group of the 

 Grallatorial Birds. 



PROB-OS-CID'E-A (Lat. prob scis, the snout). The order of Mammals com- 

 prising the Elephants. 



PRO-BOS cis (Lat. or Gr. for the snout). Applied to the spiral trunk of Lepidop- 

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

 tral polypite in the Medusa. 



PRO-CCE'LOUS (Gr. pro, in front; Icoilos, hollow). Applied to vertebrae, the 

 bodies of which are hollow or concave in front. 



PRO-GLOT'TIS (Gr. for the tip of the tongue). The generative segment or joint 

 of a Tape-worm. 



PRO'LEGS. The false abdominal feet of Caterpillars. 



PRO-NA'TION (Lat. pronus, lying on the face, prone). The act of turning the 

 palm of the hand downward. 



PRO-PO'DI-UM (Gr. pro, before ; pous, foot). The anterior part of the foot in 

 Molluscs. 



PRO-SCO'LEX (Gr. pro, before ; scolex, worm). The first embryonic stage of a 

 Tape-worm. 



PROS-O-BRAN-CHI-A'TA (Gr. proso, in advance of; Iragchia, gills). A division 

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

 heart. 



PRO-SO'MA (Gr. pro, before ; soma, body). The anterior part of the body. 



PRO-THO'RAX ^Gr. pro ; and t7torax, chest). The anterior ring of the thorax 

 of insects. 



PRO-TOPH'Y-TA (Gr. protos, first ; andphuton, plant). The lowest division of 



' plants. 



PRO'TO-PLASM (Gr. protos ; and plasso, I mould). The elementary basis of 

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

 the Protozoa. 



PRO-TOP'O-DITE (Gr. protos/ and pous, foot). The basal segment of the typi- 

 cal limb of a Crustacean. 



PRO-TO-ZO'A (Gr. protos ; and zoZn, animal). The lowest division of the ani- 

 mal kingdom. 



PRO-VEN-TRIC'U-LL'S (Lat. pro, in front of; ventriculus, dim. of venter, belly). 

 The cardiac portion of the stomach of Birds. 



PROX'I-MAL (Lat. proximus, next). The slowly-growing, comparatively-fixed 

 extremity of a limb or of an organism. 



PSAL-TE'RI-UM (Lat. for a stringed instrument). The third stomach of Ku- 

 minants. (See Omasum.) 



PSEC-DEM'BRY-O (Gr. pseudes, false ; emlruon, embryo). The larval form of 

 an Echinoderm. 



PSSU-DO-BRAN'CHI-A (Gr. pseudes, false ; bragchia, gills). A supplementary gill 

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

 not, therefore, assist in respiration. 



