INDEX 
563 
Cypris, 97; internal stages, 98; with 
parasitic Danalia, 1380, 131 
Sattis, 421; S. pulex, 382, 421 
Salter, on facial suture of Trinucleus, 226 ; 
on classification of Trilobites, 243 
Salticidae, 479 
Salticus, 420; S. scenicus, 372, 376, 420 
Sao, 235, 247; S. hirsuta, development, 
239 
Sapphirina, 69; colour, 60; S. opalina, 
69 
Sarcoptes, 466; S. mutans, 466 
Sarcoptidae, 455, 466 
Sarcoptinae, 466 
Sars, G. O., on Calanidae, 58 ; on Isopoda, 
122 ;. on Crustacea of the Caspian, 215 ; 
on Pycnogons, 504 
Savigny, 526 
Scaecorhynchus, 533 
Scalidognathus, 33S 
Scalpellum, S4, 85; complemental male, 
86; sex, 86, 105 f. ; S. balanoides, sex, 
86; S. ornatum, sex, 87; S. peronii, 
male, 86; sex, 87, 105; S. velutinum, 
sex, 87; S. vulgare, 85, 86 ; male, 83 ; 
sex, 86, 87 
Scaphognathite, 152 
Scapholeberis, 39, 52; S. mucronata, 52 
Schimkewitsch, 527, 534 
Schizochroal eye, 228, 229 
Schizonotidae, 310, 312 
Schizonotus, 312 
Schizopoda, 112; re-cla.sification, 113 ; 
relation to Macrura, 162 
Schizorhynchus, 121 
Schmeil, on fresh-water Copepoda, 59, 62 
Schultze, on position of Tardigrada, 483 
Sciptolus, 535 
Sclerocrangon, distribution, 200 
Sclerosoma, 490; S. quadridentatwm, 450 
Sclerosomatinae, 449 
Scodra, 390 
Scopula, 324, 324, 389 n. 
Scorpio, 305, 307; S. boehmi, 307; S. 
maurus, 307 
Scorpion, 297 f. 
Scorpionidae, 306 
Scorpionidea, 258, 297 f.; habits, 298 ; 
senses, 299; poison, 299, 301; mating 
habits, 300; external structure, 301 ; 
prosoma, 301; pre-cheliceral segment, 
301; development of eyes, 301 ; meso- 
soma, 302 ; metasoma, 303 ; appendages, 
303 ; pedal spurs, 304, 306, 307, 308 ; 
tibial spurs, 304, 306, 307, 308; in- 
ternal anatomy, 304 ; alimentary canal, 
304; vascular system, 305; nervous 
system, 305; endosternite, 305 ; gene- 
rative organ, 305 ; development of, 305 ; 
classification, 306; fossil, 298;  re- 
semblance to Eurypterids, 292 
Scorpioninae, 306, 307 
Scorpiops, 308 
Scotinoecus, 390 
Scott, on fish-parasites, 69 n. 
Scourfield, on Cladocera, 51 n. 
Scutum, of Spiders, 317, 394; of Ticks, 
469 
Scyllarus, 167 ; S. arctus, 165, 167 
Scytodes thoracica, 393 
Scytodidae, 393 
Segestria, 395: S. perfida, 369; S. seno- 
culata, 395 
Segestriinae, 395 
Segmentation, of Crustacea, 5 f. ; of Trilo- 
bites, 223 f.; of Arachnida, 256; of 
Limulus, 263 ; of Pyenogons, 501 f. 
Selenopinae, 474 
Selenops, 414 
Semper, 521 n. 
Senoculidae, 478 
Senoculus, 418 
Sense-organs, of Arachnids, 257; of 
Limulus, 271,272 ; of Tardigrada, 482 ; 
of Pentastomida, 491 (see also Auditory 
organ, Eyes) 
Sergestes, 162 
Sergestidae, 162; Zoaea, 161; distribu- 
tion, 204 
Serolidae, 126 
Serolis, 126; distribution, 200; S. 
antarctica, S. bronleyana, S. schytei— 
eyes, 149 
Serrula, 322, 433 
Sesarma, 196 ; distribution, 213 
Setella, 61 
Sex, in Crustacea, 100; in Trilobites, 235 
Sexual dimorphism, of Copepoda, 57, 67, 
75; of Inachus, 103; of Tanaidae, 
123; of Gnathia, 125; of Prawns, 
159; of Gelasimus, 194; of Spiders, 
379 
Sheet-webs, 352 
Shell-gland, 13 
Shipley, A. E., introduction to Arachnida, 
253 f. ; on Xiphosura, 259 f. ; on Tar- 
digrada, 475 f.; on Pentastomida, 
488 f. 
Shrimp, 153, 158, 164, 198, 199 
Shumardia, 245 
Shumardiidae, 245 
Sicariidae, 327, 393 
Sicarius, 393 
Sida, 51 ; reproduction, 49; S. erystallina, 
22, 39, 40 
Sididae, 57 ; appendages, 40; heart, 45 
Siebold, von, 464 n. 
Sigilla, 410 
Silvestri, 473 n. 
Simocephalus, 452 ; 
appendages, 41 
Simon, 303, 314 n.. 326, 385, 386 n., 387, 
391 n., 397 n., 400, 401 n., 406, 408 n., 
414 n., 418, 431, 483, 449, 452 
S. vetulus, 38, 39; 
