Seriola falcata, iii. 6. 
lalandi, iii. 6. 
—— picturata, li. 183. 
rivoliana, iii. 6. 
Serpents, observations upon pelagic, ii. 303-313. 
, “turbinal” bone of, vi. 502. 
Serranus analogus, vi. 383, 385, 410. 
anthias, ii. 173. 
cabrilla, ii. 173, 182, 200. 
coronatus, vi. 385. 
couchii, ii. 174. 
creolus, vi. 385, 409. 
—— fimbriatus, i. 173. 
fuscus, ti. 173. 
marginatus, ti. 173. 
rasor, il. 73. 
rufus, ii. 174, 
sellicauda, vi. 385, 409. 
striatus, V1. 385. 
undulosus, vi. 385. 
Sertularella gayi, viii. 469-471, 474, 480. 
polyzonias, viii. 469-471, 474. 
robusta, vill. 471. 
abietina, viii. 470. 
affinis, ix. 520. 
alternata, ix. 521. 
avillaris, ix. 519, 521. 
— bombyliformis, ix. 518, 520. 
cimbiciformis, ix. 521, 
Sesia 
cunninghami, ix. 522. 
diffinis, ix. 519, 
fadus, ix. 530. 
—— fuciformis, ix. 518, 520. 
fuscicaudis, ix. 522. 
grotei, ix. 521. 
—— hylas, ix. 522. 
infernalis, ix. 517. 
—— milesiformis, ix. 518. 
pelasgus, ix. 521. 
radians, ix. 518, 520. 
—— ruficaudis, ix. 521. 
saundersii, ix. 520. 
stellatarum, ix. 524, 
tantalus, ix. 530. 
—— thetis, ix. 519. 
—— thysbe, ix. 521. 
— whitelyi, ix. 519. 
85 
Shark, pectoral type of limb of, x. 474. 
Sharks and Skates, on the structure and deyelop- 
ment of the skull in, x. 189-234. 
Short-snouted Porpoise, vi. 24. 
Sicyases fasciatus, vi. 390. 
sanguineus, x. 469. 
Sicydium plumieri, vi. 389. 
Sigalion buskii, ix. 390, 391, 394. 
mathilde, ix. 390, 408. 
Sigalionide, ix. 390-392, 405-414. 
Sillago acuta, ti. 308. 
Silpha japonica, i. 94. 
melanaria, i. 94. 
Silurus ascita, ii. 370. 
boalis, ii. 368. 
fasciatus, ii. 372. 
glanis, ii. 368. 
pabo, ii. 367, 368. 
Simia, appendicular skeleton of, vi. 175-218. 
abelii, ii. 168, 170; iii. 418. 
morio, ii. 168, 169, 170, 171, 172; iti. 384, 385, 
388. 
satyrus, ii. 165, 169, 170; iii. 418; v. 254, 276. 
, osteology of, i. 343-379. 
sabea, v. 273. 
troglodytes, v. 254, 277. 
—— —,, osteology of, i. 343-379. 
—— wurmbii, ii. 165, 166, 168, 170, 171, 172; iti. 
384. 
Stren lacertina, i. 215, 216, 219. 
Sirenia, vi. 87, 110. 
Sitta europea, x. 251, 312, 314. 
, Skull of, x. 284. 
Sittella, sp.? skull of, x. 262, 311, 312. 
Skate and Dog-fish, the skulls of the, as compared 
with each other, x. 225. 
——, the Thornback, embryos of, x. 221; skull of, 
x. 222. 
Skate’s skull, on the structure and development of 
the, x. 213. 
Skylark, skull of the, x. 276. 
Sloth, observations on the neck of the three-toed, i. 
113-116. 
Slow Loris. See Nycticebus tardigradus. 
Smaris angustatus, ii. 178. 
insidiator, 11.178. 
royeri, ii. 178. 
