For example, in the neurocranial cartilage of larvae exposed to 5 x [10.sup.-7] M RA as gastrulae, the ventral elements of all seven arches can be found (Meckel's cartilage in the mandibular arch, the ceratohyal in the hyoid arch
, and the ceratobranchials in the branchial arches).
They possess a typical balistoid (Balistidae, Monacanthidae, and the Ostraciidae) hyoid arch
with no hypertrophy of the first branchiostegal ray or the associated hyohyoideus abductor muscle, and the pectoral girdle is unmodified relative to other file fishes (Matsuura 1979; Tyler 1980).
the ossification of the ligament connecting the suspensorium to the ethmoid region (190: 0 [right arrow] 1) and the interhyal (ossified or not) being connected by ligaments to both the hyoid arch
and the suspensorium (225: 0 [right arrow] 1) (see Appendix 2).