Figure 3.

Unrestricted lobular testis of the Red Drum Scianops ocellatus. (A). Longitudinal section of the testis, from the periphery (P) to the efferent ducts (Ed). Testicular lobules (Lo) run parallel and illustrate the typical Mid germinal epithelium development Phase during the annual reproductive cycle. (B). Section near the periphery of the testis containing continuous cysts with synchronous germinal cells (Gc) along the wall of the lobules (Lo), a continuous germinal epithelium, and spermatozoa (Sz) in the lumen. (C,D). Sections near the efferent ducts where the cysts of germinal cells (Gc) are discontinuous, compared with these seen near the periphery. The lumen of the lobules (Lo) contains abundant spermatozoa (Sz). €. Interstitial tissue (It) between the lobules (Lo). There are abundant spermatozoa (Sz) in the lobular lumen. Cysts with primary spermatocytes (1Sc) adjacent to the lobule wall are seen. (A,D,E): Toluidine blue. (B,C): Hematoxylin-eosin. (A): Bar = 1mm; (B,C): Bars = 100 μm; (D): Bar = 50 μm; (E): Bar = 10 μm.