346 GLOSSARY. 



PsEc-DO-H^'jiAi, (Gr. pseudee, false ; and Tudma^ blood). Applied to the 

 vascular system of Annelida. 



Psed'do-hearts. Certain contractile cavities connected with the atrial sys- 

 tem of 3rachiopoda, and long considered to he hearts. 



PsEU-DO-N Av-i-oEL'LiB ( Gr. pseudes, false ; and Navieula, a fenus of Diatoms). 

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

 in shape to the Navieula. 



Psed-do-po'di-a (Gr. paeudea ; and p(yus, foot). The extensions of the body- 

 substance ■which are put forth by the Bldzopoda at vfill, and which senre 

 for locomotion and prehension. 



PsEu-Do'vA (Gi. 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; scai pons, foot). A class of the Mollusca 

 which swim by means of fins attached near the head. 



Ptek-o-sau'bi-a (Gr. pteron, wing ; saura, lizard). An extinct order of Eep- 

 tiies. 



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

 into the composition of the pelvic arch of Vertebrates. 



PttL-MO-aAs^EK-op'o-DA (= Pulmonifera). 



Pni/-M0-NA'Ei-A. A division of Arachnida which breathe by means of pulmo- 

 nary sacs. 



Pul'mo-na-et. 



Pcl'mo-nate. Possessing lungs. 



Pci>Mo-inF'E-KA (Lat. puIttw, a lung ■ and fero, I carry). The division of 

 Mollusca which breathe by means of a pulmonary chamber. 



Pd'pa (Lat. for a doll). The stage of an msect immediately preceding its ap- 

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

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

 is often called a " nymph." 



Pt-lo'ecs (Gr. puloros, a gatekeeper). The valvular aperture between the 

 stomach and the Intestines. 



Pte'i-foem (Lat. pirum orpyrum, a pear ; and forma, form). Pear-shaped. 



Qtjad-eu-ma'na (Lat. quatuor, four ; manus, handl. The order of Mammals 

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



QUAD-EB-MA NODS. 



Ea-di-a'ta (Tjat. radius, a ra;^). Formerly applied to a large number of ani- 

 mals which are now placed in separate sub-kingdoms (e. g., the Ccdenterata, 

 the Echinodermata, the Infuioria, etc.). 



Ea-di-o-ia'ei-a (Lat. radius, a ray). A division of Protozoa. 



Ea'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. 



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

 or mandible of Vertebrates. 



Eap-to'ees (Lat. rapio, I plunder). The order of the birds of Prey. 



Eap-to'ei-al. 



Ea-so'ees (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 Buds, which 

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



BiEc'thm (Lat. rectus, straight). The terminal portion of the intestinal canal, 

 opening at the surface of the body at the anus. 



Eep-til'i-a (Lat. repo, I crawl). The class of the Vertebrata comprising tho 

 Tortoises, Snakes, Lizards, Crocodiles, etc. 



EE.TI0-U-L4 Ei-A (Lat. reticulum, a net). Employed by Dr. Carpenter to desig- 

 nate those Protozoa, such as the ^oraminifera, in which tiie pseudopodia 

 run into one another and form a network. 



Eb-tio'u-lum (Lat. for a net). The second division of the complex stomach 

 of Eumiuants, often called tho " honey-comb bog." 



