Maas, 0. 



Cornacuspongia, 22. 



Spongilla, 28. 

 MacBbide, E. W., see Bride, E. 



W. Mac. 

 McCrady, J. 



Bolina, 151. ' 



Cunoctantha, 58. 

 McIntosh, W. C. 



Nemertini, 233. 



Ortlionectidffi, 206. 



Syllis, 304. 



MCMURRICH, J. P. 



Aulactinia, 94. 

 Cyanea, 106. 

 Hexactiniae, 92. 

 Magdeburg. 

 Placina, 14. 



MAIiAQUIN, A. 



Annelida, 355. 

 Marion, A. F. 



Balanoglossus, 390. 

 Marshall, W. 



Porifera, 29, 35. 



Eeniera, 25. 

 Martens, E. von. 



Asteroidea, 455. 

 Megnin, p. 



Echinorhynchus, 255. 

 Meissner, G. 



Gordiidffi, 244, 245. 

 Merejkowsky, C. de. See also 

 Mereschkowsky, K. 



Porifera, 34. 

 Mereschkowsky, K. 



Hydroidea, 52. 

 Metschnikoff, E. 



iEeginopsis, 57, 58. 



Agalma, 64. 



Aglaura, 57. 



Annelida, 271. 



Ascetta, 22. 



Asteroidea, 405. 



Astropecten, 402. 



Auricularia, 418. 



Balanoglossus, 390. 



Bipinnaria, 432, 435. 



Brachiolaria, 432, 435. 



Campanularia, 52. 



Ctenophora, 138, 141, 143, 144, 

 149. 



Cunina, 59. 



Echinodermata, 400, 414, 461. 



Echinoidea, 409, 414, 438, 439. 



Epibulia, 68. 



Esperia, 34. 



GeryonidflB, 53. 



Metschnikoff, E. 



Halisarca, 25. 



Halistemma, 62. 



Holothurioidea, 431. 



Hydroidea, 39, 40, 50. 



Leucandra, 20. 



Lineus, 217. 



Mitraria (Fig. 124), 276. 



Mitroeoma, 43. 



Monostomum, 190. 



Myzostoma, 315. 



Narcomedusse, 57, 58. 



Nausithoe, 113. 



Oceania, 113. 



Ophiuroidea, 406, 407, 414, 

 437. 



Ophryotrocha, 277. 



Orthonectidse, 206, 208, 209, 

 215. 



Parenchymula, 41. 



Pelagia, 118. 



Pilidium, 221. 



Planaria, 169. 



Rhopalonema, 57. 



Siphonophora, 60. 



Spatangus, 439, 443. 



Spongicola, 113. 



Stylochopsis, 168. 



Svcandra, 14, 19. 



Terebella, 273. 



Tricladida, 170, 171. 



Tubularia, 51. 



Turbellaria, 176. 

 Meyer, E. 



Amphitrite, 298. 



Annelida, 295. 



Dinophilus, 313. 



Psygmobrancbus, 297. 

 Milne-Edwards, H. 



Terebella, 273. 

 Milne-Edwards, H. , et Haime, J. 



Zoantbaria, 90, 99. 



MONIEZ, R. 



Taenia cucumerina, 193. 

 Tasniadae, 193. 



MONTICELLI, F. S. 



Cercaria Villoti, 186. 

 Trematoda, 192. 

 Morgan, T. H. 



Balanoglossus, 373, 376, 386. 



MOBTENSEN, T. 



Echinodermata, 465. 



MOSELEY, H. N. 



Heliopora, 96. 

 Hydrocoralliae, 53. 

 Saccophyton, 96. 

 Stylasteridse, 53. 



K. H. E. 



