38 ROCHESTER ACADEMY OF SCIENCE. [NoV. 23, 



through disuse, although the ancestral form might have possessed a 

 very complicated lingual apparatus. 



The Magili are so irregular in their growth that other than purely 

 conchological characters must be used for their certain identification, 

 and, while the shells possess some very good characters, I believe that 

 the animal and operculum should be given an equal place in the diag- 

 nostic characters. 



In the following notes I shall endeavor to establish the synonomy 

 as well as my material, which is unusually abundant, will permit, but 

 until the anatomy of all the forms is thoroughly worked out and their 

 life history studied we cannot hope for anything more than a pro- 

 visional classification. 



Genus MAGILUS, Montfort. 



Conch. Syst., 43, 1810. 



Campulotus, Guettard, (part) Mem. 3, 540, 1786. 

 In this genus the animal becomes fixed to some coral [Meandrina) 

 and in the adult stage forms a tube and possesses an operculum. 



Magilus antiquus, Lam. PI. 9, f. i, 2, 3. 

 An. sans Vert., 2d edition, V, 639. 

 Magilus costatus, Sowb., Conch. Icon., sp. 5, 1872. 

 Campuloiics Cuminoii, H. and A. Ad., Zool. Proc, 430, 1863. 

 Magilus Cuvieri, Desh., Conch., Reunion, 128, t. 13, f. 6, 7. 

 Magilus DJedah, Chenu, 111. Conch., t. i, f. 3, 4. 

 Magilus ellipiicus, Sowb., Genera, No. 21. 

 Magilus microcephalus Sowb., Conch. Icon., sp. 3, 1872. 

 Leptoconchus oblongus, Sowb., H. and A. Adams, Genera r, 



138. 



Leptoconchus Peroiii, Lam., An. sans Vert., 2d edition, t. 



5> P- 639. 



Leptoconchus rostratus, A. Ad., Ann. Mag. N. H., 3d ser., 



XIII, 310, 1864. 



Magilus Riippellii, Desh., Zool. Proc, 105, 1843. 



Leptoconchus Schrenkii, Lischke, Mai. Blatt., XVIII, 40, 

 1871 ; Jap. Moll, Sup., 45, t. 4, f. 9, 10. 



Magilus serratus, Desh., Sowb. in Conch. Icon., sp. 8, 1872. 



Leptoconchus serratus, Riippell, A. Adams, Ann. Mag. N. H., 

 3d ser., XIII, 310, 1864. 



