PLATE XIX. 
LiCHAS (TeKA’J’ASPIS) guandis. 
See Plates 17 and 18. 
1. A fragment of the pygidium, retaining one of the terminal spines and a portion of the other, 
showing the size and distribution of the spinules upon their surface. The drawing is made 
tVom a gutta-percha impression of the dorsal surface. 
Schoharie grit. Near Clarksville, Albany county. 
2. An imperfect pygidium, retaining a portion of the crust, and .showing the character of the axis 
and post-axial area. 
Schohaiie grit. Schoharie, Schoharie county. 
3. An imperfect pygidium of average size, showing the internal surface and retaining portions of the 
spines, the missing parts being restored in outline. This specimen is in the Ward Museum of 
Rochester University. 
Schoharie grit. Schoharie, Schoharie county. 
4. A very small pygidium, in which the axis and lateral annulations extend to the margin. Referi-ed 
with some doubt to this species. 
Schoharie grit. Near Clarksville, Albany county. 
а. The fi'ontal lobe of a small individual, with a portion of the cheek attached. 
Schoharie grit. Schoharie, Schoharie county. 
б. The axial arch of a large thoracic segment, showing the strong divergent spines. The figure is 
di-awu from a gutta-percha impression fi-om a natural mould of the dorsal surface. 
Schoharie gi-it. Knox, Albany county. 
7. A thoi-acic segment of a smaller individual, di-awn in profile, showing the axial spines. 
Schoharie grit. Near Thompson's Lake, Albany county. 
Lichas (Conoliohas) pustulosus. 
Page 80. 
8. A pygidium, retaining a portion of the ci-ust, showing the broad doublure, the two pairs of lateral 
spines and the conspicuous terminal lobe. 
Lower Helderberg group. Near Clarksville, Albany county. 
10. The left free cheek of a large example. 
Lower Helderberg group. Schoharie, Schoharie county. 
11. The right free cheek of an individual of about the same size as the preceding. 
Lower Helderberg group. Schoharie, Schoharie county. 
Lichas (Conoliohas ?), sp. ? 
Page 80. 
9. A pygidium, showing the internal surface, three pairs of lateral lobes and a relatively narrow 
terminal lobe. This specimen was incorrectly figured in Palfeontology of New York, vol. iii, pi. 
78, fig. 7, and was there referred to Lichas pustulosus. 
Lower Helderberg group. Schoharie, Schoharie county. 
