Page 



translucent (dark) 154 



transverse ^3, 160 



ultrastructure 157-158 



muscle scar 18, 41, 43, 152 



ratio of scar and shell areas 43 



muscular activity, periodicity 180 



mussel, California, water propulsion and size 195 



Mya arenaria, absorption of glucose 231 



ammonia in excreta 276 



ciliary tracts of stomach 220 



crystalline style 224 



enzymes 229 



heart physiology 242 



ligament elasticity 59 



oxygen debt 214 



oxygen utilization 214 



pH effect on cilia 246 



myogenic heart 1"4 



164 



myosin " 



solubility of 418 



Myotomus ostrearum, suspected cause of foot disease- 418 

 Myriophyllum fpicatum, (milfoil), invasion into 



Maryland and Virginia waters 430 



Mytilieola orienlalis, parasite in bivalves 420 



Mytilus edulis, absorption of glucose 231 



amino acids ^"1 



aragonite in shell 1"* 



crystalline style 224 



effect of drugs on ciliary motion 140 



gills, effect of chemicals 139 



heart beat 250 



heart physiology 242 



innervation of adductor 106 



in v.ision of oyster beds 428 



labial palps 114 



mechanical properties of cilia 135 



pacemaker system of heart 246 



sperm 341 



subligamental ridge 89 



N-ethyl-carbazole, carbohydrate reagent 197 



N-ethyl-carbazole method, for determination of 



carbohydrates in sea water 198 



nacre, ultrastructure of 54-55 



nannoplankton, as food 232 



in rearing tanks 374 



narcosis 65 



Navez, A. E., effect of pilocarpine on heart 253 



Needham, D. M., chemical changes during mus- 

 cular contraction 167 



Needier, A. B., hermaphroditism 314 



sex change 316 



Needier, A. W. H., Malpeciue Bay disease 415 



negative factors 409, 445-446 



Nelson, E. M., vitamins 391 



Nelson, T. C 71 



apron technique 187 



artificial feeding 235 



crystalline style rotation 225 



diantlin in sperm 312 



SUBJECT AND AUTHOR INDEX 



Page 



distribution of larvae in relation to tides 369 



effect of light on shell movement 175 



effect of tide on shell movement 175 



labial palps of oyster spat 115 



mantle currents 91 



promyal chamber 123 



setting 366 



spawning 308 



Skeletonema as food 232 



stimulation of larvae by light 371 



vertical distribution of larvae 402 



velum 77 



Ne77ialopsis 419 



nephridia 271 



nephroprokt 272 



Nereis, spawning 319 



nephrostome 271 



nerve cells, of ganglia 285 



multipolar 285 



under ciliated epithelium 137 



unipolar 285 



nerve net, in mantle 86 



nerve, accelerating heart beat 250-251 



branchial, microscopic structure 289 



cardiac. 251 



circumpallial 285 



distribution 281 



emerging from visceral ganglion 284 



inhibiting heart beat 251 



nervous system 71, 281, 289 



anatomy 283 



larval 360 



method of study 281 



simplification of 281 



neurosecretion, effect on spawning 313 



neurosecretory cells 293 



Newcombe, C. L., relationship of height and area in 



bivalves 31 



niacin, in oysters 391 



Nicomedes, conchoid curve 23 



Nigrelli, R. F., blood cells .--- 260 



NissI granules, in nerve cells 286 



nitrogen, in excreta of bivalves 278 



nitrogen secretion, methods 277 



Xitzschia, removal by gills 194 



Nomejko, C. A., effect of tides on shell movement.. 175 



Nomura, E., growth of Meretrix meretrix 31 



Nomura, S., effect of acetylcholine on ciliary mo- 

 tion 141 



effect of adrenaline on cilia 140 



nonincubatory species 4 



normal axis of shell 25 



Novikoff, A. B., cytochrome oxidase in egg 344 



novocaine, effect on cilia 140 



Nowinski, W. W., paramyosin 164 



periodicity in ciliary rootlets 133 



Nozawa, A., oxygen consumption in 0. circumpicla. 214 



Nueces River, Tex., sedimentation 412 



Numachi, Ken-Ichi, local races of C. gigas 266 



nymphae 49 



O'Brien, H., respiratory quotient 212 



471 



