390 Trans. Acad. Sci. of St. Louis. 



edge and lirate within, uniting posteriorly in a curve with the 

 inner lip, this margin is interrupted at the level of the suture 

 by a deep sinus; canal more or less elongated, open, and with 

 straight margins; the general aspect of the shell is constant 

 in all the species; the form of the canal and posterior sinus 

 of the outer edge permit us to distinguish at the first sight 

 the Latiaxiena from the allied genera." The following 

 species are included in the genus: — 



MuREX LUCULENTUS Reevc (= Trophon fimhriatus Hinds). 



FusDS MURicoiDES Dcsh. (fossil). 



Afer Blosvillei Desh. (= Buccinidse). 



Latiaxis rhodostoma a. Adams (= Coralliophila -\- La 

 tiaxis). 



Latiaxiena latiaxiena Jouss. (Bull. Soc. Zool. de France, 

 1883, p. 189, pi. X, fig. 1). 



Latiaxiena elegans Jouss. (Bull. Soc. Zool. de France, 

 1883, p. 190). 



All the species, save the last two, are referable to other 

 genera or families. The last two species appear to me to be 

 some form of Coralliophila {=^ Latiaxis) near Jeffrey sii K. 

 A. Smith or pacJiyraphe E. A. Smith. The genus is certainly 

 not a valid one, and in its construction the author has followed 

 closely in the footsteps of Humphreys. 



Subgenus Coralliobia A. Adams. 



<. Coralliobia A. Adams, Zool. Proc, p. 93, 1852. 



Magilus Tryon, Man. of Conch., II, p. 217, 1880 (non 

 Montf.). 



Coralliobia Fischer, Man. de Conch., p. 647, 1884. 



This subgenus has been merged with Magilus by various 

 authors, but its affinities seem to be rather with Latiaxis 

 ( Coralliophila). The shell is irregular in outline, the spire is 

 very short, lateral and partly concealed by the last whorl ; 

 surface lamellose ; aperture oval, subsinuous ; border of the 



