1. THE PlTUITARY GLAND
19
Fig. 12. Poeciliu lotipinnu. ACTH cells of control female. Note small cells, elongated nuclei with scattered chromatin, insignificant nucleolus. Masson, X 1600.
the ACTH cells; PbH also stains a gonadotrop in the eel and a pars
intermedia cell type in most teleosts (Olivereau, 1964a, 1967a; Olivereau
and Ball, 1964; Ball and Olivereau, 1966; cf. Hanke et al., 1967). The eel
cells are usually oval rather than fusiform as in Poecilia. The nucleus may
be rounded, elliptical, or pear-shaped, and the nucleolus is generally indistinct (Olivereau, 1965; Ball and Olivereau, 1966). In all teleosts in
which they have been described, these cells display no trace of an affinity
for PAS or Alcian blue; that is, they are nonmucoid or serous cells. In
Anguilla, they are rich in SH/ SS groups ( Olivereau, 1964a).
E Cells were described in Xiphophorus as polymorphic chromophobes,
forming a wedge-shaped area posterior to the 9 cells (Schreibman, 1964);
a similar arrangement was found in the surfperch, Embiotoca (Lagios,
1965). In the Pacific salmon they border the neurohypophysis behind the
mass of 9 cells, and are rather insensitive to dyes, with a fine granular
19
Fig. 12. Poeciliu lotipinnu. ACTH cells of control female. Note small cells, elongated nuclei with scattered chromatin, insignificant nucleolus. Masson, X 1600.
the ACTH cells; PbH also stains a gonadotrop in the eel and a pars
intermedia cell type in most teleosts (Olivereau, 1964a, 1967a; Olivereau
and Ball, 1964; Ball and Olivereau, 1966; cf. Hanke et al., 1967). The eel
cells are usually oval rather than fusiform as in Poecilia. The nucleus may
be rounded, elliptical, or pear-shaped, and the nucleolus is generally indistinct (Olivereau, 1965; Ball and Olivereau, 1966). In all teleosts in
which they have been described, these cells display no trace of an affinity
for PAS or Alcian blue; that is, they are nonmucoid or serous cells. In
Anguilla, they are rich in SH/ SS groups ( Olivereau, 1964a).
E Cells were described in Xiphophorus as polymorphic chromophobes,
forming a wedge-shaped area posterior to the 9 cells (Schreibman, 1964);
a similar arrangement was found in the surfperch, Embiotoca (Lagios,
1965). In the Pacific salmon they border the neurohypophysis behind the
mass of 9 cells, and are rather insensitive to dyes, with a fine granular