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smithsonian miscellaneous collections
vol. 85
8. | (✕ 6.) Enlargement of the filaments of one of the thoracic exopodites in which the filaments retain their original round, slender tubular form. This is the only specimen among several hundred that I have examined which has escaped flattening by compression. This is due to the pyritization of the filaments of this particular specimen. | |
9. | (✕ 4.) Ventral view of a specimen illustrated to show what appears to be a small oval flattened lobe attached to the dorsal side of a protopodite or it may be to the proximal joint of the exopodite; a number of the thoracic exopodites with the filaments projecting forward occur on both sides, also fragments of the large postero-lateral spines of the carapace which lie above the exopodite of the thoracic limbs. |
Plate 23
PAGE | |
Helmetia expansa Walcott | 38 |
Photograph of the holotype. |