64
Biology of Sea Turtles, Vol. II
FIGURE 2.19 Superficial ventral throat and neck muscles. Connective tissue loosely attaches
the muscle to the skin. The midline raphe (tendon) is visible along the anterior half of the
muscle. (Adapted from Wyneken, J. The Anatomy of Sea Turtles, U.S. Department of Commerce NOAA Technical Memorandum NMFS-SEFSC-470, 2001. With permission.)
FIGURE 2.20 Lateral and dorsal jaw muscles are located inside the bony skull. The dissection
of a hawksbill, shows the jaw adductors and depressors, which have multiple parts. The large
external tendon (and internal tendon, not shown) serves as muscle attachment sites. The
internal tendon slides over the trochlear process of the neurocranium. (Adapted from Schumacher, H. In: Biology of the Reptilia, C. Gans, Ed., Vol. 4, Academic Press, 1973. With
permission.)
lacrimal gland
adductor mandibulae
externus profundus
adductor mandibulae
externus superficialis
adductor
mandibulae externus
(med. part)
coronoid
process
quadrate
depressor
mandibulae
1123_C02.fm Page 64 Friday, November 15, 2002 11:16 AM