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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
Alimentary canal.—This canal is large and may be traced from the last abdominal segment through and into the head as shown in figure 9.
| Dimensions. | mm. |
| Length of body | 40 |
| Caudal spine | 30 |
| Head | 9 |
| Thorax | 26 |
| Abdomen | 4 |
 Fig. 8.—Emeraldella brocki, n. sp. Dorsal view of a flattened specimen. ✕ 1.5, showing antennules, antennæ, 3 posterior cephalic appendages, epistoma, and position of mouth. |
Observations.—The specific name is given in honor of R. W. Brock, Director of the Geological Survey of Canada, who has been
