INDEX 437 



Secondary qnilla : Pigeon, 38S 



Section, transverse : Hydra, 23-24, Leash, 49-B4 ; Earthwarm, 70-74 ; Mtutel, 96-101 ; 



' Amphiaxus, 182-193 

 Segment : Leech, 36 

 Segmental organ, see Nephridia 



Segmentation ; Leech, 36 : Earthworm, 66 ; Crayfish, 124 ; Cockroach, 152 

 Segmentation of skull : Rabbit, 267 

 Sella turcica : Babbit, 269 



Semicircular canal : Dog-JUh, 204, 264^-266 ; Pigeon, 416 

 Seminal funnel : Earthworm, 67-68 

 Sense-capsules : Dog-fish, 201 ; BaWsU, 271-276 

 Sense-organs : Leech, 49 ; Mussel, 93 ; SnaU, 120 ; Crayfish, 146-150 ; Cockroach, 166 ; 



Amphioxus, 181 ; bog-fish, 2S2-266 ; Pigeim, 412-416 

 Septum : Earthworm, 88, 73 ; Amphioxus, 172 

 Septum auricularum : Pigeon, 404r-405 

 Septum, interorbital : Fowl, 363, 368 

 Septum lucidum : Rabbit, 348 

 Septum narium : Dogfish, 203 ; BaMt, 282 

 Sesamoid bone : Rabbit, 257 

 Setee : Earthworm, 66, 67, 72 

 Shell : Mmsel, 76-79 ; iS>>a«, 102, 106-106 

 Shell-gland : Uner-flvke, 30 



Sinus, blood : Leech, 42-43, 63 ; Snail, 123 ; Crayfish, 137 

 anterior cardinal : Dog-fish, 223 

 coronary : Dog-fish, 233 

 GuTierian : Dog-fish, 223 

 genital : Dog-fish, 225 

 hepatic : Dog-fish, 221 

 hyoidean : Dog-fish, 224 

 inferior jugular : Dog-fish, 223 

 inter-orbital : Dog-fish, 224 

 orbital : Dog-fish, 206, 224 

 posterior cardinal : Dog-fish, 224 

 post-orbital : Dog-flsh,i2i 

 venosus : Dog-fish, 220, 233 

 Sinus, genital : Liver-flvte. 31 

 urinary : Dog-fish, 236 

 urino-genital : Dog-fish, 237, 238' 

 Skate, 194 

 Skeleton : Amphioxus, 171-172, 182-183 ; Dog-fish, 198-212 ; Rabbit, 267-294 ; Fowl, 



356-382 

 Skeleton, appendicular : Baiiit, 286-294 ; Fowl, 374-382 

 axial : Raibit, 269-283 ; Fowl, 355-374 

 branchial : Amphioxus, 172 

 buccal : Amphioxus, 171, 183 

 endophragmal : Crayfish, 146 

 of flns : Amphioxus, 171, 183 ; Dog-fish, 211, 212 

 mammalian, 258 

 visceral : Dog-fish, 207-211 

 Skin, see Integument 



Skull :iJoff-JfoA, 201-207 ; iJa6M(, 267-283 ;J'<MiJ, 363-374 ,„, „, ^. ^. 



SNAIL, 103-123; external characters, 102-107; mantle cavity, 107-111; digestive 

 system, 113-115 ; reproductive system, 116-118 ; nervous system, 118-119 ; 

 sense-organs, 120 ; buccal mass, 120-121 ; circulatory system, 121-123 

 Somite : icccS, 36 



Spermatheca : Earthworm, 66, 68 ; Snail, 118 ; Cockroach, 167 

 Spermatoblast : Earthworm, 69 

 Spermatophore : Leech, 48 ; Snail, 117 



SvermaAosTiQTe : Earthworm, G& „ „„ _ ., ^u_ -, ^ ,. -,^a 



Spermatozoa : Sydra, 21; XeecA, 47, 54 ; Earthworm, 68, 69 ; Snatl, 116 ; Crayfish, 140 ; 



AmpMoxus, 182 

 Sphenoidal Assure : .fio^iit, 269 

 Spinal cord : Amphioxus, 179, 184 ; Dog-fish, 251-2 

 Spinous process, see Yertebra 

 Spiracle : Cockroaclt, 156 ; Dog-fish, 196 

 Spiral valve : Dog-fish, 216 

 Spleen : Dog-fish, 213 ; Rabbit, 304 ; Pigeon, 395 

 Splenial : Fowl, 373 

 Sporocyst, 32 



