PLATE XIX. 
Pleurotomaria adjtjtor. 
Page 80. 
Fig. 1. A figure of the peripheral band, and the striae above and below, enlarged three diameters. 
Pleurotomaria Itys. 
Page 76. 
Fig. 2. A figure of the peripheral band, and the striae above and below, enlarged three diameters. 
Pleurotomaria insolita. 
. Page 81. 
Fig. 3. The mesial band and adjacent striae, enlarged five diameters. 
Pleurotomaria nitella. 
Page 85. 
Fig. 4. An enlargement of the mesial band, showing the bicarination on each side, with the simple sharp 
striae; four diameters. 
Pleurotomaria Itys var. tenuispira. 
Page 87. 
Fig. 5. The peripheral band, with the adjacent striae, enlarged four diameters. 
Pleurotomaria capillaria, var. 
Page 87. 
Fig. 6. An enlargement of the peripheral band, showing a single revolving line and more distant striae than 
the typical forms of the species. See figures 20 and 21. 
Pleurotomaria capillaria. 
See page 87. 
Fig. 7. An enlargement from the ordinary form of this species, showing a striate peripheral band, and 
closely arranged striae above and below. 
Pleurotomaria sulcomarginata. 
Page 69. 
Fig’. 8. An enlargement showing a plain peripheral band with the striae carinated above and below; two 
diameters. 
Fig. 9'. A similar enlargement from another specimen, showing a striated peripheral band, with the striae 
uninterrupted above and marked by a very faint carination below; three diameters. 
Pleurotomaria Lucina. 
Page 67. 
Fig. 10. The surface of a specimen from the Hamilton group, showing the character of the striae on the two 
outer volutions — the peripheral band on the last one being marked by fine transverse striae, 
while the one preceding it has both transverse and revolving striae ; natural size. 
Fig. 11- The surface of a specimen from the Upper Helderberg limestone, showing the character of the 
peripheral band, with the strongly cancellated striae above and below ; enlarged two diameters. 
Pleurotomaria quadrilix. 
Page 86. 
Fig. 12. An enlargement of the peripheral band and surface striae ; two diameters. 
Pleurotomaria trilix. 
Page 79. 
Fig. 13. An enlargement of the peripheral band and adjacent striae, giving the characteristics of the surface; 
three diameters. 
Trochus (Palaiotrochus) Kearneyi. 
Page 133. 
Fig. 14. The dorsal side of a specimen which preserves the striae upon the last voluti'on; the upper volutions 
being denuded of the shell, and the apex incomplete. 
