INDEX 



i < 



73 



Plasmodium, 28* 



Platoum stercoreum, 51 



Platyhelminthes, 2:21, 237* : General 

 external features, 239 : Integument 

 and muscular layers, 248 : Parenchyma, 

 249: Alimentary systems, 250, 251, 

 252 : Nervous system, 252 : Water 

 vascular system, 253 ; Reproductive 

 organs, 254, 256: Development, 256, 

 257 



Platypoda, 684*, 705 



Pleopod, 5HH-- 



PleurobrachiadGB, 208 



Pleurobranchia, 508 



Pleuron, 498* 



Pleurophyllidia, 691 



Ploima, 304*, 305, 306 



Plumataria, 138 



Plumatdla, 320, 322 



Pluteus, 397, 398 



Pneumatophore, 149" 



Podobranchia, 508" 



Podomere, 484* 



Podophrya, 90, 91 



Podura, 584 



Polar body, 18 s , 19 



Polian vesicle, 354", 393 



Pollicipes, 534 



Pol i/art hra, 304, 305, 306 



Polyi-tlis, 240 



J'ulifi-i n'Kn, 260 



Polychffita, 427% 432, 433, 435, 436, 438, 

 440, 443, 444, 446, 447, 448 



Polycladida, 237*,240, 242, 248, 251, 252, 

 253, 255, 256, 257 



Polydora, 447 



Polygonliiilit , 462 



Polygordius lurteux, 463 



Polyyordiu-i neapolitanus, 462. 463, 464, 

 482 



Polykrikos, 73, 74 



Polymorphism, 131" 



PotynOe, 440 



Pofynoe txtenuata, 432 



Polynoe setosissini'i, 429, 431 



Polynoidce, 429 



Polycecti, 72, 73 



Polyophthalmus, 438 



Polype, 118*, 119 



Polyphemus, 527 



Polyphylitic, 266 



Polypodium, 155 



Polyttomecu, 243 



Polystomitm, 243, 264 



Polytrochal, 445* 



Polyzoa, 313 : Example, 314, 319" : See 

 Etfopwta and Endoprocta 



Polyzoa (Cestoda), 238* 



Pontellina mediterranea, 554 



Pontobdella, 475, 477, 478, 479, 481 



Pore- membrane, 100* 



Pores, inhalant, 97* 



Porifera, Example, 96, 102* : General 

 form and mode of growth, 105 : Leading 

 modifications of structure, 107 : Skele- 

 ton, 111: Reproduction, 112: Develop- 

 ment, 113 : Distribution, affinities, &c. , 

 115, 215 



Poromya, 647, 655, 656 



Porpita, 153, 154 



Port-hole See Cinclis 



Portuguese Man -of -War, 151 



Port HUH*, 541, 554 



Post-abdomen of Scorpion, 606 



Potnmobiidie, 525 



Poterion, 106 



Prce-abdomen of Scorpion, 605 



Prawns, 537, 538 



Prwupididce, 455 



P-riapttluts, 456, 457 



Primary axis, 10* 



Proneomenia, 663, 664, 667 



Prpnucleus, active and stationary, 82 



Pronucleus, male and female, 18", 19 



Pro-ostracum, 742* 



Priorocentrum, 73, 74 



Prorodon, 85, 86 



Proscolea, 237 



Prosiphon, 741* 



Prosobranchia See Streptoneura 



Prosopyle, 100% 108 



Prostomium, 404*, 417, 432 



Protamo&ba, 47 



Protandrous, 285 



Protective characters, 555 



Proteid, 15* 



Proteolepax, 534 



Proterospongia, 72, 73, 116 



Protobranchia, 646*, 648, 649, 653, 656, 

 662, 752 



Protoconch, 725*, 741 



Protodnlu.-i, 463, 482 



Protohydrrt, 137 



Protomerite, 77* 



Protomyxa, 63 



Protoplasm, 11*, 14, 15* 



Protopodite, 496*, 500 



Prototroch, 416*, 701 



Protozoa, 43 



Protozoasa, 553 



Proventriculus, 593 



Psammodema, 106 



Pseudo-lamellibranchia, 646*, 662 



Pseiadopod, 10* 



Pseudo-scorpionida, 611*, 613, 619, 

 621 



Pwlut, 390 



Pteropoda, 684, 687, 688, 689, 705 



Pterotrarhea, 690 



Pulex, 586 



Pulmonary sac, 691*, 692 



Pulmonata, 684*, 689, 691, 705 



P-ulstllum, 705 



Pupa (of Cirripedia), 552 



