774 ZOOLOGICAL GLOSSARY 



Rhytixa (HrDRODAMALis) sTELLARi. Steller's sea-cow: an extinct sirenian. 



ROTiFERA. A phylum of beautiful, microscopic, aquatic animals — wheel-animalcules, 194. 



RuTiLUS. Roach: a genus of cyprinoid teleostean fish. 



Saccophartnx. Gulper-eel: a deep-sea teleostean fish. 



Saccvlisa. a cirripede parasitic on the abdomen of crabs, with a free-swimming nauplius 



larva. 

 Saoitta. An arrow-worm: chaetognath, 194 

 Salamaxdra. a genus of salamander: urodelan amphibian. 

 S. maculosa. Spotted salamander. 

 Salmo salar. The Atlantic salmon: a teleostean fish. 

 S. trutta. River or brown trout, 308 



SALMONiD^. The salmon-trout family of teleosts, with a few deep-sea forms (Bathylagus, etc.). 

 Salpa. a free-swimming, pelagic, transparent tunicate. 

 Salticvs. Jumping spider: an arachnid (Araneida, Salticidse), 214 

 Saxdalops. a genus of deep-sea scjuid: cephalopod mollusc, 203 

 Sapphirixa. a marine planktonic animal: one of the larger copepod crustaceans. 

 Sarcophaua. Flesh-fly: a dipterous insect, 58 

 Sarcophilvs. Tasmanian devil: a marsupial (Dasyuridse), 438 



Sarcoptes scAuiEi. The itch-mite: a parasitic mite causing scabies in man (Acarina), 216 

 Sarsia. Free medusoid form of a hydrozoan coelenterate, 139 

 Saturxia PERxri. A silk-moth: lepidopterous insect. 



Saxicola. a genus of passerine bird including the whinchat (thrush family), 417 

 ScALOPS AQUATicus. An American, mainly aquatic, mole: an insectivore. 

 ScAPHiopus. American spade-foot toad: an anuran amphibian. 

 ScAPHiRHYxcHUs. Shovel-nosed sturgeon of North America: a chondrostean fish. 

 SCAPHOPODA. A class of molluscs with cylindrical shell, which burrow in the sand — DentaUum, 



etc. 

 ScELOPoRua. A lizard: lacertilian reptile. 



ScHisTOCERCA GREGARiA. Descrt locust: an orthopterous insect (Acrididse). 

 Schistosoma h.ematobia. The parasitic trematode worm causing bilharzia, 187 

 SCHIZOPODA. An order of Malacostraca (crustaceans) comprising the opossum shrimps, 



mysids, etc. 

 SCiURiDvE. A family of rodents comprising the squirrels, marmot, prairie-dog, etc. 

 sciUROMOBPHA. A division of rodents comprising the squirrels, beavers, jumping hares, etc. 

 SciuRus vulgaris. The European red sciuirrel: a rodent. 

 ScoLOPEXDRA MORsiTAXs. A Centipede: myriapod (Chilopoda), 210 

 SCOMBRID.^. A family of teleostean fish comprising the mackerel, tunny, etc. 

 ScoPELARCHUs AXALis. A decp-sea teleostean fish. 

 ScoRP^xA. Scorpion-fish: a poisonous teleostean fish, 302 

 ScuTiGERA. House centipede: a genus of myriapod (Chilopoda), 160 

 Scy-LLioRHixus CAXicuLA. Europcau spotted dogfish: a selachian fish, 280 

 ScYLLiuM. A genus of dogfish: selachian fish. 

 ScYMxus. A genus of shark: selachian fish. 

 SCYPHOZOA. A class of ccelenterates, comprising the jellyfish. 

 SEDENTARIA. A division of polychsete worms comprising the tube-dwelling (tubicolous) forms, 



such as Branchiomma, in contrast to the Errantia. 

 Selache maxima. The basking shark: a selachian fish, 283 

 Semotilus. Horned dace of North America: a cyprinoid teleostean fish. 

 Sepia. Cuttlefish: a dibranchiate cephalopod mollusc, 201 

 Seps. a genus of skink: lacertilian reptile (Scincidse). 



Sergestes prehexsilis. A luminous pelagic shrimp: decapod crustacean. 

 Serpextarius cristatus. The African secretary bird: a bird-of-prey, feeding mainly on 



reptiles (Falconiformes), 413 

 Serraxus. Sea-bass, or sea-perch: a teleostean fish, 693 

 Sertularia. a hydrozoan coelenterate. 

 Si A LI A. Bluebird: a passerine bird (thrush family). 

 siLURiD^. The cat-fish family of teleostean fish. 



