012 



COMPARATIVE ANATUMY 



. 17 



Mcr/i^locriiiiis, 307 

 Mdumpas, 109 

 Mi'hfuida:, 6 

 Melc'ttjrina, 17 



,, inaryiirUift'ra, 



Atdibc, IS 

 MrJUta, 293 



„ iestvdiiiii/ii, 293 

 ilchwrinidw, 307 

 Meli'criniix, 307 



„ AW"'*', 307 



Mdimites, 2S0 



,, midtipura, apical system, 340 

 Melon if idee, 289 

 Membrana liniitaus, 173 

 Meima rentricnsa, apical system, 323 

 Meniri.v (OytJierea), 18 

 Meridosterual test, 349 

 Mesites, 313 ; ambulacrum, section, 386 

 MesoUastiis, 315 

 Me.^(>drs}!tcdi(/tv, 18 

 Mesoplax, 64 

 Mesorcbium, 230 

 Mehdilnstiix, 315 

 Metncrinus, 313 



„ I'uf/idatvs, tegmen calycis, 365 



,, Miin-aiji, 311 



Metaplax, 64 

 Metapodium, 106 

 Melrndira, 298 

 Micitcstbetes, 166 

 Micraster, 203 



,, corftn(/^///<?;y/^ apical system, 324 



MUIericrin us, 310 

 Miliieria, 49 

 2Iiiji(isfer, 296 

 Mithnidin, 299 

 Mitra, 101 

 Mitridir, 6 

 3Iiidio/tt, IS 

 Mitdi'i/tfrid, 15 

 M<dra, 503 



Mollusc, bypothetieal primitive, 26 

 Mnlpiidia. 287 



duUnsis, 488 

 M„l2i<i.diidce, 287 

 Monocyclic base (Criu.), 328 

 Moii"ci/dic(i, 303 

 Afuiiaf/'mopora, S 

 Miiiiiiiin/ariii, 14, 124 ; shell, 64 

 M<nttiplcurida\ IS 

 Miinotocardia, 5 • 

 MuHfuciita. 93 

 Miidlrria (Moll. 

 Miidl,'riaa;i, 124 

 Miielleridm, 124 

 Mallaria (Echin.' 

 Mure.,; 101 



,, trvixulus, alimentary canal, 189 

 Ml' ri rider, 

 Midda. 17 

 Midellncv, 51 

 Mija, 19 



diagram, 31 ; gills, 90 

 124 



285 



Mjjiweet, IS 

 Myuda; 64 

 Mj/iidee, 19 

 Mi/nehama, 51 



Mf/iijjsiihr, 24 



Mijrintriiehits, 2SS 



RiiiJdi, 246 

 Mi/lilidv, 15 

 MtjtduH edidis, 15 

 Mij.euster, 29S 



Naoella, 108 



Nacreous layer of shell, 57 



Narieu, 108 



Nuricider, 107 



Ndfandu, 10 



Natica Jcvphina, 107 ; swelling of foot, 



119 

 Nidieidir, 

 Xaiddnidru, 22 



Niiutdvs, 22; eye, 169; diagram, 37; 

 gonads, 230 ; nervous system, 

 145, 146 ; pallial complex, 

 82 ; tentacles, 117 



,, PuiupUins, 22 



Xdvtdus group, 68 

 Xedria, 296 



Needham's (spermatophoral) pouch, 238 

 Nnu-rinvidea, 303 

 Neuitieiiia, 3 

 Neinncniido', 3 

 Nroinndiiiei, 3 

 jVep/erripheustcc, 78 

 Neptunea eontretrieu 160 

 Ncritaeea, 4 

 NeTitidcr, 5 

 A^erltiiier, 5 

 Neritipsidw, 5 

 Notseum, 10 

 Xnt(crehus, 10 



„ punetalua, nervous system, 141 



X,,ti,spi,hr, 10 

 Ni>tj,breine]Hra, 90 

 ynl/ihreineha'i(hr, 11 

 Nuchal plate, 126 

 XucleoUastielce, 315 

 Niiridu, IJf ; ctenidia, 85 



„ iti'eh'us, 14 

 NiieuUela;, IJf 

 yud.ibronrlua, 12 



OCTOPODA, 24 

 Odupiididu, 24. 



Oelnpvs, 24 ; anatomy, 147 ; nervous 

 system, 148 

 ,, ■i-idijuris,25; gonad, female, 231 ; 



male, 239 

 Ocular plates (Echinoid.), 321 ; (Ast.) 354 

 Odontoblasts, 183 

 Odontophore, 336 

 (Jtiji'jjsid'e, 2J/. 

 oldjnpy fills, 293 

 Odru, 30 



