INDEX 



US'.) 



iii Patella, 300 ; in Sepia, 357 ; m 7V,v- 

 brati'li/iii fii'iiti'iitrinuiilis, 413 



Shell-gland, formation of, in (_'i/cloj>s, 199 ; 

 in larva of Denti/Uinn, 329 ; in larva of 

 Jhrififciixiii, 335 ; in embryo of L"li(/<>, 

 357 ; in larva of Patella, 299 



Siphonoglyphe, definition of, 83 



Siphonophora, 53, 161 ; development of, 

 64-66 



Sipnnculoidea, 163, 372, 406 



Sipit-ncultis, 385 ; development of, 380 



Slime glands, formation of, in Perlpatus 

 1-ii/nnsis, 175 



Solaster, 459, 481, 484, 501, 565, 656 



Solaxti'i- fiiileca, 457, 529 ; development of, 

 482 



Solenocytes of archinepliridium of Poh/- 

 gordins, 140; of larval kidneys of Gastro- 

 poda, 323 ; of nephridia of Aiiipliiu.i'iix 

 li/iiceolatus, 600 ; of nephridium in Polij- 

 gordius, 138 



Solenogastres, 291 ; ancestor of, 368 ; de- 

 velopment of, 324-325 



Somites, definition of, in Polygordius, 145 ; 

 formation of, in embryo of AMjihiu.viix 

 In iie<'i>lat us, 594 ; in embryo of Astact'*. 

 187 ; in embryo of Don aria, 251 ; in 

 embryo of Pei-iimtus enpensis, 171 



!<l>n, Idla, 428 



S<l>iii?ella draco, 433 



Spadix of medusa of Titbularia, 58 



Spatangoidea, 511, 565 



Spermatic!, definition of, 6 



Spermatocyte of first order, 6 ; definition of, 

 3 ; of second order, definition of, 6 



Spermatogeuesis, definition of, 2 



Spermatogonium, definition of, 3 



Spermatozoon, definition of, 2 ; formation 

 of, 6, 7 



Xji/idem'/iinns, 525, 526 



Xji/it/ei-ec/iinits graiii'/cris, 504 



Sphaeridia, formation of, in Ei-lii/nm escu- 

 li.'ittt/s, 520 



X t >;<ters, 282 



Spinal cord, formation of. in AmpMoxus 

 lanceolatus, 593 ; in larva of Cynthia 

 partita, 619 



Spines, formation of, in llrhiniis fxi-nlentus, 

 515 



Spinnerets, formation of, in Af/rlaut, 231 



Spinning glands, formation of, in Agc/ena, 

 231 



Spiouiformia, 128 



Spiral caecum, formation of, in Loligo, 365 



Spiral cleavage of egg of (.'erebi-dtnlns lacteus, 

 119 ; of egg of Dreissensia, 333-335 ; of 

 egg of Patella, 293-295 ; of egg of P1,ns- 

 I'lilii/na, 373-374 ; of egg of J'lanueera, 

 104-108; of egg of Polygm-dius, 129-139 



Spiral twisting of Polu<ii/i, distinguished 

 from torsion, 316-317 



Splanchnocoele, formation of, in J mpli inrns 

 lanceolatus, 595 



, development of. 47 



rix, 50 



Squame of antenna in Zoaea larva of 

 Caridea, 210 



Stalk, formation of, in larva of Antedow 

 rosacea, 548 ; in larva of Asterlii*, Jii'i ; 

 in larva of Petfi<r//i,i,<. JO-'! ; in larva of 

 Terebi-nt ul !na, 412 



Star-fish, *perm of, used to cross ft-nili/,- 

 eggs of Sea-urchin, 17 



Stercoral pocket, formation of, in Afieli-im 

 230 



Htei-HHspix, 153 



Sti-riiuni, development of, of >'<</;'/, /,-,. 

 282 



Stigmata, formation of, in L'ionn intextimili.-i, 

 628 ; in Itonatia, 258, 259 



Stolon, foi'ination of, in Diplosomidae, (i4i! ; 

 in Liolinlinii, 639 ; in Pyrosoma, 639 ; in 

 Salpa, 639 ; in Urochorda, 638 



Stolouial liuddiug in Urochorda, 638-641 



Stomach, formation of, in J//</o/", 235 ; in 

 adult Asterias, 469, 471 ; in larva <>\ 

 Asterias, 462 ; in larva of Il< ila/n n/ln** us 

 clavigerus, 573 ; in (.'iumi lut^tinuli^, 

 625 ; in Dental I urn, 32S ; in L<>l/</i>. :',t)4 : 

 in Cyphonautes larva of Mfiiiln-niiijinrii. 

 389 ; in larva of Ophiothrix fragilis, 487 ; 

 in larva of I'l-dn-cUi nn, 400 ; in larva of 

 Polii<in,->i;nx, 142 ; in larva of >'////"/</" 

 ifii/itata, 532 



Stomatopoda, 177, 219 ; development uf, 

 216-218 



Stomocot'lc of AnijiJi iu.i-iiH In i//-i'i>liil us, 006 



Stomodaeum, definition of, 76 ; formation 

 of, in Ai/i'!<_'iia, 226 ; in Amphi.i-i<fi lanceo- 

 latus, 604; in embryo of Anteili'n rosacea, 

 547 ; in A scar is megalocephala, 444 ; in 

 Astaciis, 183, 184 ; in larva of Axfri-id.'.. 

 462 ; in larva of Balanoglossus clavigerus, 

 573 ; in Beroe, 94 ; in /.'////<//., 279 ; in 

 Crepii!n/<i, 323; in Hrva of Cucumaria 

 ji/aufi, 542 ; in Jh'nfulinin, 328 : in 

 liiiinifiii, 252, 253 ; in Ih-eissviisiu, 336 ; 

 in adult Echini's esculentus, 515; in 

 larva of Eclnnns i-xmli-iit UN, 508 ; in 

 Fiona, 323 ; in Cyphonautes larva of 

 Ale'iiilii-iiiii/nn-n, 389; in ..V. ////(//*, 160; 

 in larva of Opkiothrix fragilis, -1S7 : in 

 Paludina, 310; in Patella, 2^ ; in I',-<li- 

 i-i-lliua, 400; in l'< '1-lpntnx <;/ji, - ; /,v/x. 17.">; 

 in J'lifixi-nl, ixuiiiii. :;7<i : in /'////>. 32 1 ; in 

 PlaiK'i-i-i-ii. 109; in /'"///'/'</.///'-. 137-138, 

 323 ; in ><////,/ bipunctata, 131 ; in l,-ir\; 

 of ^i/nii/ifd <i;<iitnfii, 532 ; in Trnl.nif,,/!,!,! 

 septentrionalis, 110; in l'ni, M52 ; in 

 Urticina crassiwrnis, 7'.' ; iiii'taiimrpli 

 (it, in larva uf (inUi-i-n,-i-l/i nhni, 269 



x/<i,iiiitiii;i apicata, di^i-lupmcnt of, 61 



Stonr-c:iii;il t'lii-iiiatioii of, in Antedon rosai 

 550; in .l.v/ivi'i/*, 469: in AxfiTinii </</,/ 

 474 ; in AV7//////.S- . scvlentus, 51 u : of '//,/,/,,. 

 flii-i.'-fi-iiijilix, 491 ; in ttjdniirii /-/- vispina, 

 501 : in Xiiii/it<t iiiijitiitu, 533 



stiv|^in,-nia, definition of, I 



