419 



Spirobolus, 169. 



Spiroptera megastoma, 261 ; stroiigy- 

 Hna, 261. 



Stenophicla linearis, 319, 336. 



Sterility between species, G. J. Ro- 

 manes on, 340. 



Stiamus braehyurus, 319, 32.5, 336. 



Stigmatrachelus alteruans, 322 ; flexuo- 

 sus, 319, 324 ; longiceps, 319. 322 ; 

 ruptus, 319, 322 ; vittatus, 319, 322. 



Straticus, 326 ; funestus, 319, 327. 



Stridulating-organ of Sphasrotherium, 

 165, 172. 



Strongylocentrotus, 96, 101, 105, 110, 

 179, 198, 200 ; lividus, 179 ; pei-i- 

 gnatbio girdle in, 198, 211. 



Strongyliis Arnfieldi, anatomy of, 285. 



Axei (Cobb.), preceded by remarks 



on its aiflnities, by Dr. T. Spencer 

 Cobbold, 259. 



■ , 260; armatus, 288; Arnfieldi, 



285; Axei, 262, 263, 264, con- 

 tortus, 200; Douglassii, 260, 262, 

 263; filaria, 285; micrurus, 285; 

 pergi-acilis, 260 ; tetracanthus, 286. 



■ tetracanthus, structure and deve- 

 lopment of, 286, 288, 291 ; cocoon- 

 forming habit of, 290 ; literature 

 concerning, 291. 



Structure of edges of plates at sutures 

 in Diadematidae, 98. 



Struthio molybdophanes, Strongyloid 

 worm in, 263. 



Suricata, brain of, 8. 



Swamping effects of intercrossing, 343. 



Sympanotus, 58; pictus, 60, 62, 84. 



Synchitini, 60. 



Synthecium elegans, 137, 138 ; ramo- 

 sum, 137, 159. 



Sy states laticollis, 319, 327. 



Tanyrhynchinas (African), 319. 

 Tanyrhynchus elHpticus, 319, 330, 336. 

 Tarphiosoma echinatum, 119 ; fasciata, 



120 ; luridum, 1 19. 

 Tarphius pilosus, 119. 

 Temnopleuridte, 179, 187, 192, 193, 



195, 200, 208, 209; perignathic 



girdle in, 187. 

 Temnopleurus toreumaticus, 179, 190. 

 Teredolaemus, 59, 124 ; biplagiutus, 124; 



guttatus, 60, 74 ; politus, 60, 74, 84, 



124 ; simiiis, 1 24. 

 Teredus, 60, 74 ; biplagiatus, 124 ; po- 

 litus, 60. 

 Tetrapygiis nigra, 57. 

 Thecocladium, 149; flabellum, 149, 160. 

 Thuiaria, 136. 14^4, 145, 149 ; diapbana, 



145, 160; heteromorpba, 147, 160; 



Hippisleyana, 146, 160 ; interrupta, 



145. 159 ; polymorpha, 149 ; ramo- 



sis.sima, 146, 160. 

 Tbyroderus, 58, 60; porcatus, 60, 83, 



84. 

 Timola. 331 ; suturalis, 319, 332. 

 Tracheal system of Spbasrotherium, 166. 

 Trachypholis, 120 ; Erichsoni, 120, 131; 



fasciculata, 120. 

 Trichodactylus, 274 ; anonym us, 274. 

 Trichonema arcuata, 288. 

 stage of growth of Strongylus 



tetracanthus, 291. 

 Trionus, 59 ; opacus, 60, 70, 122, 131. 

 TyroglyphidiB, 270. 

 Tyroglyphus, 270 ; anonymus, 274 ; 



longior, 274 ; setiferus, 273. 



Ursus, brain of, 19. 



Vespa Crabro, antennary organs of, 170. 

 Viverra, brain of, 5, 10. 

 ViverrinjJE, brain of, 24. 



Watson, Rev. R. Roog, on Cerithiop- 

 sides from N. Atlantic and Madeira, 

 89. 



Wilder, Prof. Burt, on brains of dog 

 and cat, 2. 



Wolf, brain of, 3. 



Worm in tail of Gadus, 178. 



from the mouth of a snake, 177. 



Xestoleberis curta, 314; intermedia. 



314; sulcata, 314, tumifacta, 314; 



variegata, 314. 

 Xuthia, 58, 59 ; niponica, 60, 71, 123 ; 



parallela, 60, 70, 122, 131. 

 Xylophagous insects of Japan, 58. 



Zephronia, 162, 166. 

 Zygopinse (African), 319. 



END or THE NINETEENTH YOLTJME. 



PKINTED BY TATLOR AND TEANCIS, EBD LION COFRT, I-LEET STEEEX. 



