. Smithsonian miscellaneous collections . epipoditesshown by figures 1 and 2, plate 92, and the exopodites shown byfigure 6, plate 21, and plates 22, 23 of the 1918 paper. In additionto the epipodites being proportionally somewhat smaller and shorter,the fringing filaments of the epipodites are quite dissimilar. It hasbeen suggested that the strong filaments of the exopodite have beenbroken or pulled off from joints of the specimen, represented byfigure 1, plate 92. (See also figs. 3 and 4, pi. 20, of the 1918 paper.)A study of the fringing filaments or spines of the epipodite clearlyshows tha
. Smithsonian miscellaneous collections . epipoditesshown by figures 1 and 2, plate 92, and the exopodites shown byfigure 6, plate 21, and plates 22, 23 of the 1918 paper. In additionto the epipodites being proportionally somewhat smaller and shorter,the fringing filaments of the epipodites are quite dissimilar. It hasbeen suggested that the strong filaments of the exopodite have beenbroken or pulled off from joints of the specimen, represented byfigure 1, plate 92. (See also figs. 3 and 4, pi. 20, of the 1918 paper.)A study of the fringing filaments or spines of the epipodite clearlyshows that they are inserted in the margin of the exoskeleton at thecrests of the fluted margin (text fig. 12) and that the large filamentsof the exopodite are inserted between the crests (text fig. 11) andalmost touch each other at the points of insertion. In my notes ofthe 1918 paper I did not pay attention to the details of structure of no. 7 NOTES ON STRUCTURE OF NEOLENUS 373 O u bfl— ;> u o V C ^^ .rt ^■2 ^ S • e °£\o 2. 374 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6j the fringing filaments of the exopodite and epipodite as it seemed soclear that the two were dissimilar, as shown by the figures on plates 20,21, 23, that I decided to let the illustrations tell their own story. There are a number of specimens showing the exopodites andthere is not one that shows evidence of a spinous carina or offringing filaments broken away from the margin of the largeproximal joint so as to give anything like the appearance of theshort marginal setae or spines of the proximal joint of the epipodite. Transverse section of the thorax of Neolenus.—Text figure 13is a restoration of a posterior view of the appendages of the thoraxof Neolenus differing from that published in 1918 x in the omissionof the small hypothetical exite and the small tentatively assumedepipodite; there are also changes of detail in the exopodite andepipodite. The interior boundary lines of the exopodite that werei
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
