48 MOLLUSCA FROM THE GREAT OOLITE. 



EOLIMA COMMUNIS. Plate IX, figs. 21, 21a. 



E. Testa iurritd, lavigatd; spird regulari, obtusd ; anfractibus subplanis in (state 

 juniori, aetate progrediente convexis ; aperturd ovatd ; labro tenui. 



Shell turreted, smooth ; spire regular, obtuse ; whorls rather flattened in the young 

 state, but with advanced age more convex ; aperture ovate ; lip thin. 



When young the shell is much more flattened and obtuse ; but in all stages of growth 

 the junctions of the whorls are strongly marked the oldest specimens have the lines of 

 growth strongly developed upon the last volution. The contrast between the peculiar 

 flatness and almost conical figure of the young shells and older specimens which have lost 

 their apex is so great, that without the assistance of intermediate forms they would 

 probably be regarded as distinct species. The length never exceeds an inch. 



Locality. This is decidedly the most common univalve of the Great Oolite, and occurs 

 in all the shelly beds, more especially in the soft shelly Oolite beneath the planking at 

 Minchinhampton Common. 



ECLIMA PYGMJEA. Plate IX, fig. 1. 



E. Testa Icevigatd, turritd ; spird obtusd; anfractilus paucis, subplanis ; aperturd sub- 

 contractd. 



Shell smooth, turreted ; spire obtuse ; whorls few, nearly flat ; aperture oblique, and 

 somewhat contracted laterally. 



The last whorl is large, its length being half of that of the entire shell ; the obtuseness 

 of the spire, fewer volutions, nearly cylindrical figure, and obliquity of the aperture, 

 separate it from E. vagans. 



Locality. A single specimen is all we have met with : it occurred in the white stone 

 of Bussage. 



EULIMA VAGANS. Plate IX, figs. 3, 4. 



E. Testa turritd, lavi, elatd; spird acutd, anfractibus paucis subplanis; aperturd 

 ovatd ; labro dcxtro subexpanso. 



Shell turreted, smooth, elevated; spire acute; whorls few, high, and nearly flat; 

 aperture ovate ; right lip somewhat expanded. 



The last whorl is nearly equal in length to all the others together. 



Locality. It occurs in the shelly planking rarely ; and a few casts have also been 

 obtained in the upper portion of the formation, east of Minchinhampton. 



