30 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 92 



86. Muscidus flagellaris cxopoditis II pedis maxillaris (fig. lo). — 

 This muscle arises on the proximal border of the enlarged first ring 

 of the flagellum and runs nearly to the tip, giving off short fibers at 

 every annulation. As a consequence the flagellum has a considerable 

 degree of mobility. 



87. Muscidus abductor dagelli exopoditis II pedis maxillaris (fig. 

 10). — This muscle arises in two parts on the proximal dorsal side of 

 the basal segment of the exopodite, fuses and runs to its insertion on 

 the first ring of the flagellum, to which it imparts a strong outward 

 motion. 



88. Muscidus productor meropoditis II pedis maxiUaris (fig. lo) . — 

 This muscle arises on the ventral lateral border of the basi-ischiopodite 

 and is inserted on the inner ventral proximal edge of the meropodite. 

 The muscle is short but powerful. It moves the meropodite forward. 



8q. Muscidus reductor meropoditis II pedis maxiUaris (fig. lo). — 

 More slender than 88 but likewise short, this muscle rises on the dorsal 

 proximal border of the basi-ischiopodite and is inserted on the lateral 

 proximal border of the meropodite. It tends to pull the meropodite 

 backward. 



po. Musculus abductor carpopoditis II pedis maxillaris (fig. lo).— 

 This muscle originates in many bundles of fibers near the inner proxi- 

 mal border of the meropodite and is inserted on the proximal inner 

 edge of the carpopodite. It moves the carpopodite upward and outward. 



pi. Musculus adductor carpopoditis II pedis maxillaris (fig. lo). — 

 About the same size as the preceding, this muscle arises in a bundle 

 of fibers on the inner surface of the meropodite and is inserted on the 

 proximal inner edge of the carpopodite which it moves downward and 

 inward. 



p2. Musculus productor propoditis II pedis maxillaris (fig. lo). — • 

 Arising on the outer proximal wall of the carpopodite, this muscle nar- 

 rows rapidly to its tendinous insertion on the outer proximal edge of 

 the propodite, which it moves strongly forward. 



pj. Musculus reductor propoditis II pedis umxillaris (fig. lo). — 

 This relatively small muscle arises on the inner proximal part of the 

 carpopodite and is inserted by a tendon on the inner proximal border 

 of the propodite which it bends backward, and hence toward the mouth. 



P4. Muscidus productor dactylopoditis II pedis maxillaris (fig. 

 lo). — Arising on the outer proximal part of the propodite, this muscle 

 is inserted by a short tendon on the outer proximal border of the 

 dactylopodite, which it moves forward. 



p^. Musculus reductor dactylopoditis II pedis maxillaris (fig. lo). — 

 Like the preceding in size and shape, this muscle arises on the inner 



