530 MICHIGAN SURVEY, 1905. 



Page. 



Pulchella, Vallonia 520 



PULMONATA 459 



PUNCTIN^ 495 



PUNCTUM 495 



PUPILLA 513 



PUPILLID^ 504 



PUPOIDES 508 



Pusilla, Vertigo 524 



Pygmcea, Helix 496 



Pygmoea, Microphysa 496 



Pygmseum, Punctum 496 



Pygmceum minutissimum , Punctum 496 



Pyramidula , . 490 



Radiatulus, Zonites 478 



Retusa, Succinea 500 



Retusa decampii, Succinea 501 



Retusa magister, Succinea 501 



Retusa peoriensis, Succinea 501 



Rhoadsi, Vitrea : 480 



Sayana, Polygyra 464 



Sayi, Helix 464 



Sayi, Polygyra 464 



Sayii, Mesodon 464 



Sayii, Ulostoma 464 



SiGMURETHRA 459 



Simplex, Vertigo 496 



Sphyradium 496 



Solitaria, Anguispira 492 



Solitaria, Anguspira 492 



Solitaria, Helix 492 



Solitaria, Patula 492 . 



Solitaria, Pyramidula 492 



Solitaria albina, Pyramidula 492 



Solitaria albino, Patula 492 



Stenotrema 470 



Striatella, Helix . 493 



Striatella, Patula 493 



Striatella, Pyramidula 493 



Striatella alba, Pyramidula 493 



Striatella albina, Patula ' 493 



Striatella alba, Pyramidula 493 



Striatella catskillensis, Pyramidula 493 



Striatura 479 



Strobilops 505 



Stylommatophora 459 



Subcylindrica, Ferussacia 519 



Subcylindrace, Zua 519 



Subcylindricea, Zua 519 



Succinea 499 



succineid^ 499 



Suppressa, Gastrodonta 488 



Suppressa, Helix •. 488 



Suppressus, Zonites • ■ 488 



Tappaniana, Bifidaria 512 



Thyroides, Helix 469 



Thyroides, Mesodon 468 



Thyroides, polygyra 408 



Thyroides bucculenta, Polygyra 524 



Thyroides pulchella. Helix 409 



Thyroides pulchella, Polygyra 469 



Thyroidus, Helix 468 



Tridentata, Helix ^ 462 



