. Bulletin - United States National Museum. Science. 38 BULLETIN 201, UNITED STATES NATIONAL MUSEUM is long and narrow, about three times as long as broad. The exopod is likewise rather long and narrow compared with other members of the group Figure 4.—Petalophthalmus armiger Willemoes-Suhm: a, Right mandible, X 24%; b, left mandible, X 24%; c, maxillule, X 24%; d, maxilla, X 24%; e, endopod of first thoracic limb, X 24%;/, first pleopod of male; X 10%; g, second pleopod of male, X 10%. The first thoracic limb (fig. 4, e) (maxilliped) has a small but dis- tinct gnathobasic lobe on the
. Bulletin - United States National Museum. Science. 38 BULLETIN 201, UNITED STATES NATIONAL MUSEUM is long and narrow, about three times as long as broad. The exopod is likewise rather long and narrow compared with other members of the group Figure 4.—Petalophthalmus armiger Willemoes-Suhm: a, Right mandible, X 24%; b, left mandible, X 24%; c, maxillule, X 24%; d, maxilla, X 24%; e, endopod of first thoracic limb, X 24%;/, first pleopod of male; X 10%; g, second pleopod of male, X 10%. The first thoracic limb (fig. 4, e) (maxilliped) has a small but dis- tinct gnathobasic lobe on the second joint and the large lobe from the fourth joint appears to be more pointed and narrower than is figured by Sars (1885), and terminates in a single strong spine. There is a well-developed epipodite present on this appendage. Sars (1885) stated that it was absent. I have nothing to add to the existing descriptions of the remaining thoracic appendages, except to note that the last thoracic limb of the male has a well-developed genital appendix of the normal mysidacean. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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