146 



Length, 19 ; breadth, 7 ; length of aperture 5, and of canal 

 5 ; width of aperture, 3. 



Locality. — Lower beds at Muddy Creek. 



Genus Pseudoyaricia. 



Name in allusion to the abnormal character of the varices. 



Type. — P. mirabilis, spec, no v. 



Generic characters. — Shell cylindroid-fusiform, smooth, spire 

 obtuse, whorls with a few remote and non-continuous imbricat- 

 ing varices ; canal very short, wide ; columella smooth, slightly 

 arched. 



The varices are not produced as ordinarily by an outward 

 thickening or bulging of the shell wall, but appear as abrupt 

 step-like interruptions to the regularity of the spiral curve, 

 and seem to indicate that each periodic mouth was slightly 

 margined with enamel, and the new growth to have been com- 

 menced from within, so that the successive growths are not in 

 the same plane. 



The peculiarity of its variceal characters and the blunt apex 

 remove this genus from Genea, Bellardi, of the Italian Tertiary, 

 which in other particulars it resembles. Tryon, in his Manual 

 of Conchology, places Genea in a subordinate position to Misus, 

 but I think it is more related to Neptunea or Sipho. 



1. Pseudovaricia mirabilis, spec. nov. PI. vii., figs. 9a— 9c. 



Shell elongately fusiform, smooth, shining, rather thin, with 

 a cylindrical spire a little longer than the aperture, ending in 

 a very blunt apex of two very rapidly narrowing whorls, flat- 

 tened at the summit. 



Whorls below the apex, six, very broad, of slow increase, flatly 

 convex, with a very narrow high-sloping shoulder, defined by a 

 strong thread ; 11 varices, or about two to a whorl, irregularly 

 disposed. Whole surface transversely, finely, and closely 

 striated, except on the shoulder, where they are stouter and 

 more distant. On each side of the angulation are two or three 

 spiral threads, which on the posterior whorls are cut up into 

 elongate granulations. 



Aperture elliptical ; outer lip plain, smooth within ; 

 columella slightly incurved, smooth ; canal wide, short, nearly 

 straight, obliquely emarginate. 



Length, 46 ; breadth, 13 ; length of aperture and canal, 21 ; 

 width of aperture, 6. 



Locality. — Lower beds at Muddy Creek {J. Lennantl). 



