8 ON SOME TERTIARY FOSSILS, 



indistinct tooth-like plaits. The labrum is thin, and the throat 

 lirate. There is a constriction of the labrum at the suture which 

 with the flat sulcus at the upper part of the whorl gives this shell 

 the aspect of a Baphnella. The obsolete plaits on the columella 

 bear out this resemblance. 



MlTRA OTHONE. PL 2, fig. 4. 



Testa parva, ovata, utrimque attenuata, solidiuscula ; anfr. 6, 

 aqualiter, crebre cancellata, liris longitudinalibus ct spiralibus ita ut 

 textilosa apparent, sutura haud impressa, spira eonica, ultim. anfr. haud 

 cequanti ; apice acuto, apertura anguste ovata, labro solido, simplici; 

 columella definita, 4 plicata, 2 mediis majoribus. Long. 10, lat. 4£. 

 Nomen specificum a Gr. oOov-q flinteumj derivatur ab aspectu texturato 

 totius testce. 



This is a small Mitra, the whole surface of which is closely 

 cancellated so as to resemble linen. The suture is not impressed, 

 the spire conical ; the whorls very slightly convex ; the columella 

 has four plaits, two central being larger and more oblique. 



Mitra dictua. PL 3, fig. 7. 

 Testa elongato-fiisiformi, spira quam apertura longiori, opaca; anfr. 

 6^parum convexis, declivibas, undique sabtillissime clathratis, ultimo 

 anfr. eostis longitud. evanidis, lineis spiralibus validis alternant ibus ; 

 apice Jrevi, apertura late ovata ; canali haudbrevi, labro tenui, columella 

 biplicata, plica antiea absoleta. Long. 12, lat. 5^, long spir. 7. 



This shell is very closely allied to 31. alokiza but the differences 

 are, that it is broader in proportion to the length and finely 

 laticed, while M. a. is simply grooved, and the grooves are 

 regularly and finely punctate, with three distinct plaits on the 

 columella, while this species has only two and the lower one 

 almost obsolete. The canal is also longer and more acute while 

 the anterior end of 21. a. is obtuse, and the suture is marginate. 



Mitra coarctata. PL 2, fig. 10, 

 Testa parva, anguste ovata, polita, spira brevi ; anfr. 3, Icevibus, 

 striis incrcmeuli taittuin insignitis ; apice obtiao, sutura inconspicuo, 



