VI 



THE NAUTILUS. 



Limnaea palustris Mull. 



Limnaea reflexa jolietensis Baker, n. var 



Limnaea stagnalis L. var. appressa Say 



Liomesus nassula Dall, n. sp. 



Loo Choo Islands, new land shells from the 



Lucapina crenulata Sowb., animal of 



Lucina, a gigantic fossil 



Lucina megameris Dall, n. sp. 



Macrochlamys cerasina Pils., n. sp. 



Mandarina exoptata Pils., n. sp. 



Margaritana margaritifera L. 



Meseschiza grosvenorii Lea, Notes on 



Microcystina hahajimana Pils., n. sp. 



Modiolaria discors L. 



Modiolus hamatus Say 



Modiolus modiolus L. 



Modiolus plicatulus Lam. 



Mollusks, the approximate number of 



Monoplex Perry = Ranularia Schum 



Montana, collecting shells in 



Mytilus edulis L. 



Mytilus pellucidus Penn. 



Navanax inermis Cooper, 



Nenia smithiae Pils., n. sp 



Ostrea borealis Lam. . 



Ostrea virginica Lam. 



Pecten irradians Lam. 



Pecten tenuicostatus Migh. and Ad 



Physa anatina Lea 



Physa ancillaria Say . 



Physa ampullacea Gould 



Physa billingsi Heron 



Ph} T sa brevispira Lea 



Physa crassa Walker . 



Physa crocata Lea 



Phjsa cubensis Pfr. . 



Physa deformis Currier 



Physa distorta Hald. . 



Physa elliptica Lea 



86, 103, 110 



4 2 



111 



17 



110 



89 



8,61 



71 



40 



41 



117 



117 



89 



5 



118 



106 



96 



104 



105 



46 



108 



, 129 



94 



95 



72 



37,39 



131 



131 



113 



113 



57 



128 



112 



56 



57 



43 



70 



58 



55 



70 



54 



