42
smithsonian miscellaneous collections
vol. 85
Plate 15
| PAGE | |||
| Naraoia spinifer, new species | 15 | ||
| Fig. | 1. | (✕ 2.) Posterior dorsal shield with traces of segmented body and thoracic limbs; a dorsal view of another specimen shows clearly defined exopodites with the slender, distal ends of endopodites projecting from beneath them. | |
| Naraoia compacta Walcott | 10 | ||
| Fig. | 2. | (✕ 2.) Smaller, retouched picture of the specimen shown in fig. 4, pl. 13. | |
| 3. | (✕ 1.5.) Incomplete individual clearly showing the axis. | ||
| Burgessia bella Walcott | 15 | ||
| Fig. | 4. | (✕ 3.) Specimen showing the outlines of 10 thoracic legs formed of the six joints of the endopodite and the large protopodite, also the annulated intestine and fragments of the crushed carapace. | |
| 5. | (✕ 4.) A dorsal view of a specimen in which the stomach and portion of the intestine as well as the large hepatic tubes are distended so as to be moderately convex. The specimen also shows the position of the antennae and portions of the hepatic caeca. | ||
| 6. | (✕ 4.) A macerated specimen indicating the position of the eyes, the antennae, a portion of the labrum, the mandibles, the maxillulae, and the maxillae; also the proximal portion of seven pairs of the thoracic limbs, with a fair indication of the point of attachment of the limbs to the body. | ||
| 7. | (✕ 3.) Another very fine individual. | ||
Plate 16
| PAGE | |||
| Burgessia bella Walcott | 13 | ||
| Fig. | 1. | (✕ 2.) Fragmentary specimen indicating structure of limbs. (Possibly oriented incorrectly.) | |
| 2. | (✕ 4.) A specimen preserving 10 pairs of thoracic limbs, showing their approximate place of attachment to the body, and also their expanded joints and general form.
The carapace has been crowded back and crushed, but the antennae project from its anterior side in an almost natural position. | ||
| 3. | (✕ 2.) A badly decayed specimen that shows the manner of attachment of the limbs. | ||
| 4. | (✕ 4.) Dorsal view of a specimen with the digestive organs beautifully preserved. These include the intestine posterior to the large hepatic tubes, the stomach anterior to the latter, and also the anterior and posterior branches of the main hepatic tubes and the numerous finer hepatic caeca, which occur on both the outer and inner sides of the main branches.
This specimen gives most of the data for the restoration of the digestive organs as shown by text fig. 5. | ||
