All the mandibular teeth, except the two anterior and the fourth pair, pass into like pits in the upper jaw.
Behind the mandibular arch are present a well-developed hyoid (hy) and a first branchial arch (not shewn in fig. 146).
The posterior part lies completely within the mandibular arch.
The mesoblast is divided up into numerous somites, and the mandibular and first two branchial arches are indicated.
The metastoma, which has become in Ammocœtes the lower lip supplied by the velar or mandibular branch of the trigeminal nerve ; 2.
In some Sharks (Notidani) seven branchial arches may be present (not including the hyoid and mandibular).
mandibular strobe: a broad deep groove on outer side of mandible in some Coleoptera.
It may be noted as a peculiarity of the mandibular arch that it is never provided with an unpaired basal element.
The hyoid arch has a number of ossifications in it and is closely connected with the mandibular arch.
In Scyllium the hyoid and mandibular arches are at first very similar to those which follow.