For group-2, the identifiable structures were: epidermis and rhabdites, layer of longitudinal muscular fibers, lumen of pharynx, pharynx cavity, gastrovascular cavity, parenchyma and bowel lumen--see Figure 4.
Group-1 shows the following structures: pharynx lumen, layer of longitudinal muscular fibers and epidermis with rhabdites (see Table 1 and Figure 5).
In the epidermis, the rhabdites (which have an uncertain function), and unicell glands (which are deeply located and open to the surface producing mucus) are visible.
In the histology samples for groups 1 and 2, the epidermis, rhabdites and unicell glands can be observed.
In group-1, it is possible to notice pharynx lumen, layer of longitudinal muscular fibers, epidermis and rhabdites. For group-2, only the epidermis is observed.
The present study indicated that for groups 1 and 2 the body fragment shows the following structures: epidermis, rhabdites, and unicell glands.