84 THE >'AUTILUS. 



For Peeturcidus Lam, 1799, is substituted AxincEa Poli, 1795. 



For Hindsia Desh. 1858 (not of A. Ad., 1853) is substituted 

 Hindsiella Stol. 



For Cyprina Lam. 1818, is substituted Arctica Schum, 1817. 



For Terebellum Lam. (not of Linn.) is substituted Seraphs Montf. 



For Triton Montf. (not of Linn.) is substituted Lampusia Schum., 

 1817. 



For Pteronotus Swains. 1840 (not Gray, 1838) is substituted Tri- 

 plex Humph., 1797. 



For Leiostoma Swains. 1840 (not Lacepede, 1802) is substituted 

 Sycu7n Bayle. 



For Lampania Gray, 1847, is substituted Batillaria Bens., 1842. 



For Pomatias Hartm. 1821 (not Studer, 1789) is substituted 

 Hartmannia Newton, 1891. 



For Proserpina Sowb. 1839 (not Hiibn., 1816) is substituted 

 Despcena Kewton, 1891. 



For Cylichna Loven, 1846 (not Burm., 1844) is substituted 

 Bulinella Kewton, 1891, 



A portion of these changes may prove unnecessary, as in the case 

 0^ Proserpina, where Mr. Newton's new name must be suppressed in 

 favor of one of the several subgeneric names already proposed under 

 Proserpina. Some others hang upon such preoccupation as Cyprinus 

 for Cyprina, and it is still doubtful whether these should be con- 

 sidered equivalent as names. A further review of the work mil 

 ajjpear later. 



In the addutor muscles of L'xionid.e. — The newly formed 

 parts, anterior, and posterior, are easily distinguished from the 

 older parts by their coloration, being lighter, even whitish. This is 

 found most marked in spring and early summer when new growth 

 is going on rapidly ; but also in fall I have seen it in different 

 species. — Dr. V. Sterki. 



ly Europe, a small fish, Rhodeus amarus, is known to deposit 

 her eggs, by means of a long, flexible ovipositor, through the mantle 

 opening, in the cavity of fresh-water mns^Qh ,. Anodonta, where they 

 are hatched, aud remain until developed sufficiently to live without 

 protection. Is anything like this known from our continent? — By 

 the way, we know that young UnionidcB attach themselves on the 

 fins, etc. of fishes, after leaving the branchial uteri of their mothers. 

 But ob.servations of this kind are, probably, seldom made, and it 

 would be of value to report on each instance observed. Mahicologists 

 living in the neighborhood of fisheries could do good work in this 

 direction. — Dr. V. Sterki. 



