THE NAUTILUS. V 



Lamarck's Collection of Shells . . . 119 



Lampsilis ventricosa (Barnes) in the upper Potomac 



drainage . ... . .51 



Lymnaea auricularia near Philadelphia 



Lymnaea from Montana, A new . 115 



Lymnsea parva. . . . .65 



Lymnaea (Radix) auricularia at Cambridge, Mass. . ,116 

 Lymnaea (Radix) auricularia in Colorado . . . .84 



Macroceramus caniniarensis rotundibasis Pils. , n. subsp. . 130 

 Maine mollusca, Notes on .... .73 



Marine gasteropoda from Aden with description of new 



forms ..... . .74 



Marginella obscura Reeve, (PI. IV, fig. 16) . . 77 



Megaustenia Ckll. n. n. for Cryptosoma preoccupied . . 70 

 Mexico, Shell collected at ManzaniUo, west . . . 143 

 Microceramus perconicus trinidadensis Pils., n. var. (PI. 



VIII, figs. 15, 17, 18) . . .129 



Microceramus sanctispiritensis Pils., n. sp. (PL VIII, figs. 



11, 12, 13} ... .127 



Missouri, Shells of southeast ... . . 90 



Mitra costellaris Lam. . . . .77 



Mitra deshayesii Reeve ... ... 77 



Montana, A list of the Mollusca from the Mussel Shell 



valley ... .130 



Murex despectus Linne . .... 47 



Murex fulvescens Sowerby . . ... 120 



Musculium orbiculare Sterki, n. sp. . . . . 140 



Nassa pulla var. minor Smith n. var. (PL IV, fig. 17) . 77 

 New England notes ........ 54 



Nerita cancellata Herm. ... . 46 



New Mexico, Mollusca from Northern . . 80 



New Orleans mollusca . ..... 36 



Nodularia jourdyi Morelet 141 



Notes . . 12, 24, 35, 48, 59, 69, 84, 96, 108, 119, 132, 144 

 Nyctilochidae ....... .59 



Nyctilochus Gistel = Septa Perry = Triton Auct. . . 59 

 Odostomia trifida, winkleyi, etc. . . 54, 74 



Oliva andamanensis Bdg. (PL IV, fig. 7) . .77 



Opeas clavalinum kyotoense at Cambridge, Mass. . . 24 

 Oreohelix alta Pils., n. var. . . . 144 



Oreohelix carinifera Pils., n. sp. 



Oreohelix colonies in Colorado ... 9 



Oreohelix cooperi W. G. B. . 



Oreohelix cooperi minor Ckll. ... 10 



Oreohelix haydeni betheli n. subsp. Pils. and Ckll. . . 144 

 Oreohelix haydeni Gabb. ... 11, 89 



Oreohelix haydeni gabbiana Hemp. 11, 30 



Oreohelix hendersoni Pils., n. sp. . 11, 29 



Oreohelix strigosa depressa Ckll. (PL V, fig. 16) . 41, 81 

 Ovula (Neosimnia) hirasei Pils., n. sp. (PL VII, fig. 4) . 114 



