20 PPP
REPORT OF PROGRESS. C.E. BEECHER.
EXPLANATION OF PLATES.
Plate I.
Echinocaris socalis,Beecher.
| Fig 1. | A small example with the abdomen directed posteriorly, in a line with the-longer axis of the carapare. |
| " 2. | A similar specimen, in which the abdomen is elevated above the dorsnln. |
| " 3. | An individual with the valves opened and the abdomen closely curving around the posterior margin of tl1e left valve. |
| " 4. | Similar to the preceding. but with the abdomen protruded in front of the valves. |
| " 5. | An example preserving the carapace and four naked segments, showing the form and ornamentation of these parts of the test. |
| " 6. | A carapace with the valves opened, showing the distinct furrow limiting the cephalic and thoracic portions, the optic spots indicated by dotted lines. and the nodose ridges and elevations ornamentingthe valves. |
| " 7. | A smaller Carapace, presenting immature characters. belonging to a young example. |
| " 8. | Fragment preserving three abdominal segments, the telson and lateral spines showing the form and ornamentation. |
| " 9. | Two segnients of another fragment, enlarged to two diameters, to show the ornamentation and nature of the articulating surfaces. |
| " 10. | A small telson with tl1e attached lateral spines, showing their form and longitudinal carinæ. |
| " 11. | A piece of shale with an impression of the caudal plate, and with one of the lateral spines, belonging to a large individual. |
