392 GLOSSARY. 



PTYCHOCERAS (Gr. ptucM, a fold ; keras, a horn). A genus of Ammonitidce. 



PULMONATE. Possessing lungs. 



PYEIFOBM (Lat. pyrus, a pear; and forma, form). Pear-shaped. 



QUADRUMANA (Lat. quatuor, four ; mantis, hand). The order of Mammals 

 comprising the Apes, Monkeys, Baboons, Lemurs, &c. 



RADIATA (Lat. radius, a ray). Formerly applied to a large number of animals 

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

 Echinodermata, the Infusoria, &c.) 



RADIOLARIA (Lat. radius, a ray). A division of Protozoa. 



RAMUS (Lat. a branch). Applied to each half or branch of the lower jaw, or 

 mandible, of Vertebrates. 



RAPTORES (Lat. rapto, I plunder). The order of the Birds of Prey. 



RASORES (Lat. rado, I scratch). The order of the Scratching Birds (Fowls, 

 Pigeons, &c.) 



RECEPTACULITES (Lat. receptaculum, a storehouse). An extinct genus of 

 Protozoa. 



REPTILIA (Lat. repto, I crawl). The class of the Vertebrata comprising the 

 Tortoises, Snakes, Lizards, Crocodiles, &c. 



RETEPORA (Lat. rete, a net ; porus, a pore). A genus of Lace- corals (Polyzoa). 



RHAMPHORHYNCHUS (Gr. rhamphos, beak ; rhugchos, nose). A genus of 

 Pterosaurian Reptiles. 



RHINOCEROS (Gr. rhis, the nose ; keras, horn). A genus of Hoofed Quadru- 

 peds. 



RHIZOPODA (Gr. rhtza, a root ; and potts, foot). The division of Protozoa com- 

 prising all those which are capable of emitting pseudopodia. 



RHYNCHOLITES (Gr. rhugchos, beak ; and lithos, stone). Beak-shaped fossils 

 consisting of the mandibles of Cephalopoda. 



RHYNCHONELLA (Gr. rhugchos, nose or beak). A genus of Brachiopods. 



RODENTIA (Lat. rodo, I gnaw). An order of the Mammals ; often called Glires 

 (Lat. glis, a dormouse). 



ROTALIA (Lat. rota, a wheel). A genus of Foraminifera. 



RUGOSA (Lat rugosus, wrinkled). An order of Corals. 



RUMINANTIA (Lat. ruminor, I chew the cud). The group of Hoofed Quadru- 

 peds (Ungulata) which " ruminate " or chew the cud. 



SARCODE (Gr. sarx, flesh ; eidos, form). The jelly-like substance of which the 

 bodies of the Protozoa are composed. It is an albuminous body containing 

 oil-granules, and is sometimes called "animal protoplasm." 



SAURIA (Gr. saura, a lizard). Any lizard-like Reptile is often spoken of as a 

 "Saurian;" but the term is sometimes restricted to the Crocodiles alone, 

 or to the Crocodiles and Lacertilians. 



SAUROPTERYGIA (Gr. saura ; pteriix, wing). An extinct order of Reptiles, 

 called by Huxley Plesiosauria, from the typical genus Plesiosaurus. 



SAURUR^ (Gr. saura; oura, tail). The extinct order of Birds comprising 

 only the Archceopteryx. 



SCANSORES (Lat. scando, I climb). The order of the Climbing Birds (Parrots, 

 Woodpeckers, &c.) 



SCAPHITES (Lat. scapha, a boat). A genus of the Ammonitidce. 



SCOLITHUS (Gr. skolex, a worm ; lithos, a stone). The vertical burrows of sea- 

 worms in rocks. 



SCUTA (Lat. scutum, a shield). Applied to any shield-like plates ; especially to 

 those which are developed in the integument of many Reptiles. 



SELACHIA or SELACHII (Gr. selachos, a cartilaginous fish, probably a shark). 

 The sub-order of Elasmobranchii comprising the Sharks and Dog-fishes. 



SEPIOSTAIRE. The internal shell of the Sepia, commonly known as the 

 "cuttle-bone." 



SEPTA. Partitions. 



SERPENTIFORM. Resembling a serpent in shape. 



SERTULARIDA (Lat. sertum, a wreath). An order of Hydrozoa. 



