770 ZOOLOGICAL GLOSSARY 



Obeli A. A genus of marine hydroid : hydrozoan ccelenterate, 152 



OcHoioNA. The pika, or calling hare: Lagomorpha. 



Octopus vulgaris. The common octopus: a dibranchiate cephalopod mollusc, 93, 202 



OcTDPODA IPPENS. The racing crab: a decapod crustacean, 205 



ODONATA. An order of insects comprising the dragonflies, with aquatic larvae. 



ODONTOCETi. A sub-order of cetaceans comprising the toothed whales (sperm-whale, porpoise, 

 dolphin, etc.). 



Odostostllis. The fire-worm: free-swimming polychaete worm. 



(EDicyEMUs. Stone curlew: Charadriiformes. 



Ok API A. The okapi: ruminant of the giraffe family. 



OLiGOCH^TES. A class of annelid worms comprising the earthworms, etc. 



OycHiDiuM. A genus of pulmonate mollusc. 



Oniscus. a woodlouse: terrestrial isopod crustacean. 



ONYCHOPHORA. A class of Arthropoda comjirising the caterpillar-like Peripatus and its rela- 

 tives. 



Ophiops. a genus of lizard: lacertilian rejitile. 



Ophiotettix limosina. Grouse-locust: an orthopterous insect, 223 



Ophisaurus yentralis. The American " glass snake ": a lacertilian reptile (Anguidse). 



OPHiUROiDEA. A class of Echinodermata comprising the brittle-stars. 



Ophryoessa superciliosa. The Yrpha iguana: a lacertilian reptile. 



OPISTHOBRANCHIA. An Order of gastroiDod molluscs comprising the Nudibranchia, sea-hares, 

 etc. 



Opistuoproctus. a genus of deep-sea teleostean fish, 324 



Orca. The killer-whale: a genus of cetacean (Delphinidae). 



Orectolobus. The carpet shark: selachian fish. 



ORMTHORHYycHVs. The duck-billed platypus: Australian monotreme, 430 



ORTHOPTERA. An Order of in.sects comprising the cockroach, stick-insect, locust, etc. 



Ortcteropus. The aard-vark: a mammal (Tubulidentata), 442 



ORrcTOLAGUs. The rabbit: Lagomorpha (Leporidaj). 



OSTEICHTHYES. The class of bony fishes, including the Teleostei, Chondrostei, Dipnoi, 

 etc. 



OsTEOL.EMUs TETRAspis. The broad-fronted crocodile: a reptile. 



OSTRACODA. An Order of small, active, mainly fresh-water crustaceans, comprising Cypris, etc. 



Otus BAKKAMCEyA. The Scops owl: Strigidse. 



Ovis. Sheep: Artiodactyl (Bovidse). 



OxTBELis. A genus of tree-snake: a colubrid snake. 



Pachi-dacttlus maculatus. a gecko: a lacertilian reptile (Geckonidse). 



PAL.KMoy; PAL.^MoysTEs. Prawns: decapod crustaceans. 



Pax sattbus. The chimpanzee: an anthropoid ape. 



Pakdalus. a genus of deep-sea prawn: decapod crustacean. 



PAyroDoy. A flying fish of West Africa: a teleostean fish. 



Papio. The baboon of Africa: catarrhine monkey. 



PARACEyTRoius LiviDvs. A sea-urchin: an echinoderm (Echinoid). 



Paralichthys albiouttus. An American flounder: teleostean flat-fish (Pleuronectidse). 



Param(ecium. Slipper animalcule: a genus of ciliate Protozoa, 779 



PARAZOA. A sub-kingdom, comprising the sponges, in contrast to Protozoa and Metazoa. 



Parus. a titmouse: passerine bird (Paridse). 



Passer domesticus. The hou.se sparrow: a passerine bird (finch family), 408 



PASSERiFORMES. The largest order of birds comprising mainly small song birds and birds of 



perching habits (swallow, thrush, finch, Corvidse, etc.). 

 Passerita PRASiyA. The emerald tree-snake: a colubrid snake, 674 



Patella vulgata. The common European limpet: a gastropod mollusc (Prosobratich), 197 

 Pauropus. a genus of blind myriapod (Pauropoda). 

 PECTEy. The scallop: a genus of bivalve mollusc which swims by opening and closing its 



shell-valves, 200 

 PECTvycuLVs. A genus of bivalve mollusc of the family Arcidae. 

 Pedetes. The Cape jumping hare: sciuromorph rodent. 



