292 Mr. H. Seeley on Cambridge Palaontology : — 



sides, and a top which is twice as long as the sides, thus being 

 shovel- shaped. The cast is marked with fine concentric lines 

 of growth. 



This interesting little shell removes the genus back in time 

 from the Eocene to the Greensand age. It appears quite desti- 

 tute of the apical obliquity usual in the genus. Specimens have 

 been seen which possibly indicate a second species ; in them the 

 shell is longitudinally oval and more elevated. 



Rare. Coll. University. 



Galericulus. 



[Symmetrical], conical, like Emarginula, with a thin shelly 

 septum immediately behind the apex, as in Crepidula ; below 

 this is another septum, which is directed upwards towards 

 that above. The basal margin is thickened. 



This genus should be placed in the Calyptrseidse, near to 

 Crepidula. 



Galericulus alius. PI. XI. fig. 19. 



A small, regularly inflated, obliquely conical shell, with a circular 

 base. The apex slightly overhangs the posterior side, which 

 is straight and oblique. The outline from the base of the 

 sides to the apex is lanceolate, and that from the apex to the 

 anterior basal margin a curve of more than a quarter of a 

 circle. The attachment of the upper septum is, on each side 

 of the apex, a slight curve, which extends midway and half- 

 way into the shell. The attachment of the lower septum is 

 only half the length of the upper one, but much thicker ; it 

 is inclined to the right side rather than central. Lat. j^ inch, 

 alt. y^g inch. 



Loo. Coton. Coll. University Museum. 



Acmcea tenuistriata. PI. XI. fig. 20. 



Shell thin, suboval, inclining to circular, moderately elevated, 

 nearly as high as wide ; ornamented with straight, regular, 

 equal, extremely fine radiating striae, which are crossed by 

 fine concentric lines of growth. Apex a fifth the length of 

 the shell from the anterior border. 



This little shell is distinguished from A. gaultina (P. & R.) and 

 A. tenuicostata (Mich.) by being less depressed, and having 

 fainter, finer strise. I found it on breaking the mouth of an 

 Ammonite. It was not attached. 



Coll. University. 



Tornatella pyrostoma. PI. XI. fig. 21. 

 Shell elongated, subconical, thick, spirally sulcated; sulcations 



