INDEX 



327 



Rabbi t^-continued 



plexus, 278, 282 ; renal system, 286 ; repro- 

 ductive system, 276, 288; skeletal system, 

 skull, 292, 294, 298; teeth, 296; vertebral 

 column, 298, 300, 302 ; girdles and limbs, 304, 

 306, 308, 312; 316 



Raehis or shaft, 236 



Radial canals (Radiating chambers), 14, 16, 18, 

 20, 22 



Radiale, 254 



Radio -lina, 218 



Radius, 252, 306 



Radula or rasping ribbon, 124, 316 ; sac, 124 



Raia, 152-186, 316. See Skate 



Ramus communicans, 230, 232 



Ramus of lower jaw or mandible, 264, 292, 296 



Rana, 188-234, 316. See Frog 



Rasping organ. See Odontophore 



Ratitae or Running Birds, 314 



Recep taenia seminis. See Spermathecse 



Rectal cseca, 244 ; gland, 158 



Rectrices or tail feathers, 236 



Rectum, 66, 82, U8, 134, 138, 158, 194, 244, 270, 

 272 



Remiges or wing feathers, 236 



Renal system : Pigeon, 248, 250 ; rabbit, 286, 

 288. See Urino-genital system 



Reno-pericardial canal (nephrostome), 116 



Reproductive system : Hydra, 28 ; sea-an- 

 emone, 36, 38 ; liver-fluke, 40, 42 ; tape-worm, 

 48, 50 ; earth-worm, 58, 60 ; leech, 68, 70 ; 

 crayfish, 106, .108; crawfish, 106, 110; snail, 

 118, 120; mussel, 136, 138; Amphioxus, 

 146,148; dogfish, 162,164; skate, 160, 162; 

 frog and Xenopus, 214, 216, 218 ; pigeon, 

 248, 250 ; rabbit, 276, 288, 290 



Respiratory system : Cockroach, 76, 82 ; cray- 

 fish and crawfish, 94, 102 ; snail, 114, 116 ; 

 mussel, 132 ; dogfish, 168, 172 ; frog, 190, 

 212 ; pigeon, 244 ; rabbit, 268, 274, 276 



Restiform bodies, 178 



Retina, 232 



Rhagon sponge, 22 ; transverse section, 24; 316 



Rhizopods, 316 



Rhombencephalon. See Hind-brain 



Rib, 220, 238, 240, 252, 256, 258, 260, 298, 300, 

 304 



Rodentia, 316 



Rbstellum, 48 



Rostrum, 88, 260, 262 



Saccttlus rotundtis, 272 



Saccus vasculosus, 178 



Sacral region of vertebral column, 260, 298, 302 



Sacrum, 222, 302, 308 



Sagittal suture, 292 



Salivary glands, 82 ; reservoir, 82 



Scaphognathite or baler, 102 



Scaphoid or radiale, 306 



Scapula, 164, 218, 238, 252, 304, 314 



Sciatic nerve. See Nerves 



Sclerite, 74, 80 



Scleroblast, 16, 20 



Scolex, 46, 48 



Scrotal sac, 266, 288 



Scyllium, 152-186, 316. See Dogfish 



Sea-anemone ( Actinia), 34-38 ; external fea- 

 tures, 34 ; general structure, 34, 36, 38 ; 

 transverse section, 34 ; longitudinal section, 

 36, 38; 316 



Secondary feathers, 236, 252 ; rods, 144 



Segmented worms. See Annelida 



Segments, 48, 54, 64, 74, 88, 292 



Selachii or Elasmobranehii, 316 



Semicircular canal, 182, 186 



Semilunar or intermedium, 306 



Seminal duct, 60 ; vesicle. See Vesicula semi- 

 nalis 



Sense organs, 152, 154, 184 



Sensory cells, 34 ; jelly- tubes, 152, 154 ; nerves, 

 148 ; papillse, 64 



Septa, 56, 62, 142 



Septum, internasal, 312 ; interorbital, 312 



Sesamoid bone, 256, 310 



Setse. See ChEetse 



Setigerous sacs, 60 ; pads, 82 



Shaft or raehis, 236 



Shank. See Leg 



Shell, 114, 126, 128, 130, 316 



Shell-gland, 42, 50 



Shoulder girdle. See Pectoral girdle 



Sinus, peri-nephrostomial, 72 ; urinary, 162 ; 

 urino-genital, 162. See also Blood sinus 



Siphon, exhalent, 128, 134, 138 ; inhalent, 126. 

 134 



Siphonoglyph, 34, 36 



Skate (Raia), 152-186 ; external features, 154 ; 

 alimentary and vascular systems, 158, 160, 

 170, 174; urino-genital system, 162; skeletal' 

 system, 166; nervous system (brain), 176, 

 186; cranial nerves, 180, 186; eye muscles, 

 186; otocyst, 186; 316 



Skeletal system : Sponge, 16 ; crayfish and 

 crawfish, 106 ; Amphioxus, 144, 146 ; dogfish, 

 164, 176; skate, 166; frog, 194, 218, 220, 

 222, 224, 226; Xenopus, 194, 218, 220, 222, 

 224, 226; pigeom, 238, 250, 252, 254, 258, 

 262 ; rabbit, 292-312 



Skeleton, appendicular (girdles and limbs), 218, 

 220, 250, 252, 254, 256, 304, 306, 308, 312; 

 axial (skull, vertebral column, etc.), 222-226, 

 256, 262, 292, 294, 298, 300, 302; branchial, 

 144, 176 ; buccal, 144 ; endophragmal, 106 ; 

 exoskeleton, 106 ; of bird and mammal com- 

 pared, 312 ; of fins, 144, 146, 164, 166 ; visceral 

 (gill-sht region), 144, 176 



Skin. See Integument 



Skull : Dogfish, 176 ; frog and Xenopus, 222, 

 224, 226 ; pigeon, 260, 262 ; rabbit, 292, 294; 

 296, 298, 312 



Skull of bird and mammal (rabbit) compared, 

 260 



Slipper Animalcule. See Paramecium 



Snail (Helix), 114-124; external features, 114; 

 alimentary and reproductive systems, 118 ; 

 nervous system, 120,122; odontophore, 124; 

 316 



Snout, 152, 154, 184 



Solar plexus, 232, 278, 282 



Somites, 54 



Sperm morula, 10, 12 ; reservoir, 60 ; sac, 60, 

 162 



Spermathecae or receptacula seminis, 56, 60, 62, 

 120 



Spermatic cord, 284, 288 



Spermatozoa, 12, 62 



Sphenethmoid, 222, 226 



Spicules, Sponge, 14, 16 ; types of, 18 ; 316 



Spinal cord, 148, 154, 178, 228 



Spinal nerves, 228, 230, 278 



Spines, 40, 152, 154 



Spinous process. See Vertebra 



