PLATE XXVIII. 
Echinocaris punctata. 
Pig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Page 166. 
See Plates 27 and 29. 
1. The left valve of a specimen of average size, showing the normal outline and proportions, pre- 
sei-ving the node? and ridges of the surface in perfection, and retaining the faint, elevated 
lines radiating f]-om the tower edge of the cai-ina. The specimen is pi-eserved as an internal 
cast and consequently shows a finely punctate sui'face. 
2. The right valve of the same individual. 
Hamilton group. In the sandy shales at Fabius, Onondaga cotmty. 
3. A nearly entire individual, slightly distorted about the cephalothorax ; showing the six abdominal 
somites, the spine-bases on their posterior inai-gins, the caudal jilate and portions of the caudal 
spines. These spines are restoi-ed in outline to their proper length. 
Hamilton group. Pratt’s Falls, Onondiaga county. 
4. Ventral aspect of a very large individual, showing the lower edge of the right valve of the 
cephalothorax, the large mandibles in nearly their normal position, the fourth, fifth, sixth and 
a portion of the third abdominal somites, and the caudal plate with its spines. The postei'ior 
margin of the somites is so broken as to show only the lateral spinules, and the caudal spines 
appear to be somewhat shorter than is usual. 
Hamilton group. Menteth’s Point, Canandaigua Lake, 
5. The venti-al sui-face of a small, quite imperfectly preserved specimen, showing the mandibles in 
place. 
Hamilton group. Pratt’s Falls, Onondaga county. 
6. Dorsal aspect of the posterior portion of a large individual, preserving the fifth, sixth and a portion 
of the fourth somites, with the caudal plate and spines nearly entii’e. The spinules upon the 
somites are in part restored in the figure, but their character is well shown. 
7. Ventral asjiect of the same specimen, showing the absence of spinules upon the posterior margins 
of the somites, and the character of the articulation between the last somite and the caudal 
plate is well shown. 
Hamilton group. Menteth’s Point, CanandaigtM Lake. 
