328 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



Leptosurcula Gaset, Trans. St. Louis Acad., vol. 14, 1904, p. 157. Type, PL 

 beadata Harris. Eocene. Cossmann, 1906, Essais, p. 223, judgment suspended. 



Leucosyrinx Dalx, 1889, Mus. Comp. Zool. Bull., vol. 18, p. 75. Type, PI. 

 verrilli Dall. 



Leufroyia Monterosato, 1884. Nom. Conch. Medit., p. 134. Type, PI. leufroyi 

 Michaud. 



Lienardia Jousseatjme, Bull. Soc. Zool. de France, vol. 8. p. xl, 1884. Type, 

 Clathurella rubida Hinds, Indopacific. Also, Bull. Soc. Zool. de France, vol. 9, 

 p. 184, 1884. Cf. Glyphostoma Gabb. 



lophiotoma Casey, Trans. St. Louis Acad., vol. 14, 1904, p. 130. 1st sp. PI. 

 tigrina Lamarck. Recent. Cossmann, Essais, 1906, p. 220, refers this to Pleuro- 

 toma s. s. 



lora GiSTEL, Naturg., 1848, p. ix, sole example Triionium viridulum Fabricius, 

 which is a Bela, probably B, exarata Moller, according to the type-specimen. 



Lsnromaiigilia Monterosato, 1917, Bull. Soc. Zool. Ital., ser. 3, vol. 4, (separate 

 copies, p. 25). Type, PI. taeniata Deshayes, Mediterranean. 



Lyrosurcula Casey, Trans. St. Louis Acad., vol. 14, 1904, p. 156. 1st sp. 

 L. elegans Casey, Claibornian. Cossmann, 1906, Essais, p. 222, expresses no 

 opinion as type is not figured. 



Mangelia Risso, Eur. M6r., 1826, vol. 4, p. 219 ; no type mentioned. 1st sp. M. 

 costulata Risso, equals nebula Montagu, taken as type by Bellardi, 1847 ; Kobelt, 

 1905 ; Dall, 1908 ; etc. +Ra2)hUoma Weinkauff, Conch. Cab., 1876, types nebula 

 Montagu and harpula Brocchi, not Raphitoma Bellardi, 1847, but Bellardi, in 1875, 

 p. 323, states that M. vulpecula Brocchi is typical Mangilia. Shell elevated, spire 

 longer than the aperture, longitudinally ribbed, spirally minutely sculptured ; 

 pillar smooth, outer lip thin, simple, notch at the suture, nucleus smooth, short, 

 last turn finely cancellate, no operculum. Cossmann substitutes a new type 

 (Essais, p. 114, 1896) PI. vauquelini Payraudeau for Mangilia and unites with it 

 Clathromangilia Monterosato, 1884 ; CytJiarella Monterosato, 1875 ; Pseudo- 

 raphitoma Boettger, 1895; and Paraclafhurella Boettger, 1895. Thus Coss- 

 mann's group = CytJiarella. Bela (Leach) Gray, 1847, is a synonym of Man- 

 gelia with the same type. 



Mangiliella Bucquoy, Dautzenberg, and Dollfus, Moll. Roussillon, p, 108, 

 1882. Type, Mangilia multilineolata Deshayes. Like Eaedropleura but more 

 slender and not operculate. 



Megasurcula Casey, Trans. St. Louis Acad., vol. 14, 1904, p. 147 Founded 

 on the recent Surcula carpenteriana and tryoni of Gabb. No type designated. 

 Recent, California. -\-Megalosurcula Cossmann, 1906, Essais, p. 222. =Cryp- 

 toconus V. Koenen, 1867. Cossmann, Essais, p. 222, refers it to Bathytoma. 



Melatoma Swainson, Mai., 1840, p. 342. Type, M. costata Swainson, Mai., 

 1840, p. 342, fig. 104. +Clionella Gray, Proc. Zool. Soc, 1847, p. 153. Not Mela- 

 toma Anthony, 1847. 



Mesochilotoma Seeley, Ann. Mag. Nat. Hist., ser. 3, vol. 7, p. 284, 1861. 

 Monotype M. striata Seeley, Ann. Mag. Nat. Hist., ser. 3, vol. 7, p. 284, 1861. 

 Cretaceous. Equals Surculites Conrad, 1865, q. v. 



Microdrillia Casey, Proc. Acad. Nat. Sci. Phila., 1903, p. 276. 1st sp. PI. coss- 

 mann i O. Meyer {=meyeri Cossmann) Eocene. Cossmann, 1906, Essais, pp. 

 223-4, admits this as a section of Asthenotoma. 



MicrosurcTila Casey, Trans. St. Louis Acad., vol. 14, 1904, p. 154. Type, M. 

 nucleola Casey. Includes PI. georgei Harris. (Woods Bluff.) Cossmann, 

 Essais, p. 222, 1906, expresses no opinion as the type is unfigured. 



Mitromorpha A. Adams, Ann. Mag. Nat. Hist., ser. 3, 1865, vol. 15, pp. 182 and 

 322. Type, M. fllosa Carpenter, Ann. Mag. Nat. Hist., ser. 3, vol. 15, 1865, p. 182. 

 Position doubtful, usually classed near the Mitras. See Iredale, Proc. Mai. Soc, 

 vol. 12, p. 328, 1917. 



