160 

 STRAPAROLLUS HIPPOLYTA. (N. sp.) 



Fig. 144. Fig. 145. 



Fig. 144. Straparollus Hippolyta. o, view of the spire ; &, 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 2i 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, very slender, and, as shown in the cast of the interior, very 

 nearly cylindrical. Umbilicus 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 8J 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. Bell. 



