346 GLOSSARY. 



PSEU-DO-H.E'MAL (Gr. pseudes, false ; and Tiaima, blood). Applied to the 

 vascular system of Annelida. 



PSEU'DO-HEABTS. Certain contractile cavities connected with the atrial sys- 

 tem of Brachiopoda, and long considered to be hearts. 



PSEU-DO-NAV-I-CEL'L^E ( Gr. pseudes, false ; and Navicula, a genus of Diatoms). 

 The embryonic forms of the Grcgarinidce, so called from their resemblance 

 in shape to the Navicula. 



PSEU-DO-PO'DI-A (Gr. pseudes ; and pous, foot). The extensions of the body- 

 substance which are put forth by the Rhizopoda at will, and which serve 

 for locomotion and prehension. 



PSEU-DO'VA (Gr. pseudes ; (Lat. ovum, egg). The egg-like bodies from which 

 the young of the viviparous Aphis are produced. 



PTEE-OP'O-DA (Gr. pteron, wing ; and pous, foot). A class of the Mollusca 

 which swim by means of fins attached near the head. 



PTEB-O-SAU'BI-A (Gr. pteron, wing ; saura, lizard). An extinct order of Bep- 

 tiies. 



PU'BIS (Lat. pubes, hair). The share-bone ; one of the bones which enter 

 into the composition of the pelvic arch of Vertebrates. 



PUL-MO-GAS-TEB-OP'O-DA (= Pulmonifera). 



PUL-MO-NA'BI-A. A division of Arachnida which breathe by means of pulmo- 

 nary sacs. 



PUL'MO-NA-BY. 



PUL'MO-NATE. Possessing lungs. 



PUIXHO-NIF'E-BA (Lat. pulmo, a lung ; and fero, I carry). The division of 

 Mollusca which breathe by means of a pulmonary chamber. 



PU'PA (Lat. for a doll). The stage of an insect immediately preceding its ap- 

 pearance in a perfect condition. In the pupa-stage it is usually quiescemV- 

 when it is often called a " chrysalis ; " but it is sometimes active when it 

 is often called a " nymph." 



PY-LO'EUS (Gr. puloros, a gatekeeper). The valvular aperture between the 

 stomach and the intestines. 



PYB'I-FOBM (Lat. pirum orpyrum, a pear; and forma, form). Pear-shaped. 



QUAD-BTT-MA'NA (Lat. quatuor, four: manus, hand). The order of Mammals 

 comprising the Apes, Monkeys, Baboons, Lemurs, etc. 



QUAD-BU-MA NOUS. 



EA-DI-A'TA (Lat. radius, a ray). Formerly applied to a large number of ani- 

 mals which are now placed*in separate sub-kingdoms (e. g., the C&lenierata, 

 the Echinodermata, the Infusoria, etc.). 



BA-DI-O-LA'BI-A (Lat. radius, a ray). A division of Protozoa. 



KA'DI-US (Lat. for a spoke or ray). The innermost of the two bones of the fore- 

 arm of the higher Vertebrates. It carries the thumb, when present, and 

 corresponds with the tibia of the hind-limb. 



BA'MUS (Lat. for a branch). Applied to each half or branch of the lower jaw 

 or mandible of Vertebrates. 



EAP-TO'BES (Lat. rapio, I plunder). The order of the birds of Prey. 



EAP-TO'BI-AL. 



BA-SO'BES (Lat. rado, I scratch). The order of the Scratching Birds (Fowls, 

 Pigeons, etc.). 



EA-TI'T^: (Lat. ratis, a raft). Applied by Huxley to the Cursorial Biids, which 

 do not fly, and have therefore a raft-like sternum without any median keel. 



EEC'TUM (Lat. rectus, straight). The terminal portion of the intestinal canal, 

 opening at the surface of the body at the anus. 



Bfip-Tii/i-A (Lat. repo, I crawl). The class of the Vertebrata comprising tho 

 Tortoises. Snakes, Lizards, Crocodiles, etc. 



RE-TIC-U-LA BI-A (Lat. reticulum, a net). Employed by Dr. Carpenter to desig- 

 nate those Protozoa, such as the Foraminifera, in which the pseudopodia 

 run into one another and form a network. 



BE-TIO'U-LTJM (Lat. for a net). The second division of the complex stomach 

 of Buminants, often called the " honey-couib bag." 



