160 



Steaparollus Hippolyta. (N. sp.) 



Fig. 144. Fig. 145. 



Pig. 144. — Straparollus Hippolyta. a, view of the spire ; b, front view. 

 145. — S. Daphne. 



Description. — Shell small, sub-discoid ; whorls about three, the apical 

 two being very small ; suture deep. Height from 3 to 4 lines ; width 

 from 6 to 8 lines. The whorls are uniformly rounded above, below, and 

 on the outside. In some specimens they appear to be a little flattened 

 vertically. The second whorl is elevated about half its own height above 

 the body whorl. The two apical whorls are just visible above the second 

 on a side view. As the whorls are nearly cylindrical but a little flat- 

 tened vertically, the aperture must be transversely oval. In a specimen 

 7 lines wide, the width of the aperture, as shown in a cast of the interior, 

 is 3 lines, and its height about 2J lines. 



Locality and Formation. — Gait. In the Guelph formation; Middle 

 Silurian. 



Collectors. — R. Bell, E. Billings, J. Richardson. 



Straparollus Daphne. (N. sp.) 



Fig. 145. 



Description. — Obtusely conical ; apical angle about 100° ; whorls six 

 or seven, v&ry slender, and, as shown in the cast of the interior, very 

 nearly cylindrical. UmbUicus very wide, showing all the whorls quite to 

 the apex. Height of largest specimen seen about 6 lines ; width about 

 9 lines ; thickness of last whorl in a specimen 8| lines wide and showing 

 5 whorls in the umbilicus, 2^ lines. 



This species has only been found in the condition of casts of the interior, 

 and it is not quite certain what- is the form of the whorls on the outside of 

 the spire. As seen in the umbilicus, they are uniformly rounded on the 

 inner and lower sides, and a little depressed vertically so that the form of 

 the aperture must be transversely ovate. 



Locality and Formation. — Gait. In the Guelph formation; Middle 

 Silurian. 



Collectors. — A. Murray, R. BeU. 



