1. THE PITUITARY GLAND
67
Knowles and Vollrath (1966d) found that there appeared to be an
increase in the activity of Type B fibers innervating the proximal pars
distalis of seawater eels in which the gonadotrops were further developed
and more active than in the river eel; this is particularly interesting in
that there has been evidence for some years that the NLT rather than
the NPO is concerned in regulation of gonadotropic activity in teleosts
(Stahl and Leray, 1962; Oztan, 1963; Billenstien, 1963; Honma and
Tamura, 1965a,b; see Pickford and Atz, 1957, pp. %2,30).
D. Blood Supply to the Teleostean Pituitary
Key references to the blood supply of the teleostean pituitary (Fig.
24) are Bretschneider and de Wit ( 1947), Green (1951, 1966), Da Lage
( 1958), Barrington ( 1960), Lenys ( 1962), Jasinski ( 1961, 1962), Follenius (1961, 1965a,b), Bhargava ( 1966), and Wingstrand (1966a). The
0. I mm
Fig. 24. Diagram to illustrate the main features of the blood supply to the
cyprinodont pituitary. Anterior to the left. ( A ) rostra1 pars distalis, ( B ) proximal
pars distalis, and ( C ) pars intermedia. Neurohypophysial core (D). Blood enters
the gland from the hypophysial artery (h), and passes to the primary longitudinal
plexus ( F ) in the neurohypophysial core. From here it is distributed to the adenohypophysis in the secondary centrifugal plexus ( E ) , and is then collected into a
superficial venous network (black) ( G ) and passes to the hypophysial vein ( j ) . Modified from Follenius ( 1965b).
67
Knowles and Vollrath (1966d) found that there appeared to be an
increase in the activity of Type B fibers innervating the proximal pars
distalis of seawater eels in which the gonadotrops were further developed
and more active than in the river eel; this is particularly interesting in
that there has been evidence for some years that the NLT rather than
the NPO is concerned in regulation of gonadotropic activity in teleosts
(Stahl and Leray, 1962; Oztan, 1963; Billenstien, 1963; Honma and
Tamura, 1965a,b; see Pickford and Atz, 1957, pp. %2,30).
D. Blood Supply to the Teleostean Pituitary
Key references to the blood supply of the teleostean pituitary (Fig.
24) are Bretschneider and de Wit ( 1947), Green (1951, 1966), Da Lage
( 1958), Barrington ( 1960), Lenys ( 1962), Jasinski ( 1961, 1962), Follenius (1961, 1965a,b), Bhargava ( 1966), and Wingstrand (1966a). The
0. I mm
Fig. 24. Diagram to illustrate the main features of the blood supply to the
cyprinodont pituitary. Anterior to the left. ( A ) rostra1 pars distalis, ( B ) proximal
pars distalis, and ( C ) pars intermedia. Neurohypophysial core (D). Blood enters
the gland from the hypophysial artery (h), and passes to the primary longitudinal
plexus ( F ) in the neurohypophysial core. From here it is distributed to the adenohypophysis in the secondary centrifugal plexus ( E ) , and is then collected into a
superficial venous network (black) ( G ) and passes to the hypophysial vein ( j ) . Modified from Follenius ( 1965b).