. Brigham Young University science bulletin. Biology -- Periodicals. 22 Bbigham Vounc Univehsity Science Teitei > 20a Seminilerouj Tubule Diameter >190 microns Spermotoioo in Lumen of Teitei Epididymis With Motile Sperm Yolfa Depotition Ovulation Co p u la I ion Oviducti Convoluled and Voscular. T -r T Mo V June July Aug. Sept. FiS^. Stimniaiy ot vaiioiis rcpiodtit-tivi' stages (it adult S. <^. IJotli 1970 aiul 1971 data arc comliiiu'd ill older lo simulate tlie a\erag<' Ncariv trend. (Fig. 12-14 and Table 8). In the gonads again begin to increa
. Brigham Young University science bulletin. Biology -- Periodicals. 22 Bbigham Vounc Univehsity Science Teitei > 20a Seminilerouj Tubule Diameter >190 microns Spermotoioo in Lumen of Teitei Epididymis With Motile Sperm Yolfa Depotition Ovulation Co p u la I ion Oviducti Convoluled and Voscular. T -r T Mo V June July Aug. Sept. FiS^. Stimniaiy ot vaiioiis rcpiodtit-tivi' stages (it adult S. <^. IJotli 1970 aiul 1971 data arc comliiiu'd ill older lo simulate tlie a\erag<' Ncariv trend. (Fig. 12-14 and Table 8). In the gonads again begin to increase in tlie size of seminif- erous tubules and weight, continuing until (he lizards hibernate in late August and rarl\ September. Male stages are compared with those of fe- males in Fig. 15. The combined time periods (1970-71) are used to give the general yearl\ trends of male lizards in relation to females. Our data for reproductixe cveles in this species are generally similar to that ri-ported b\' W'oodbuiT and Woodbury (19451. Pre-anal Gland After considerable handling of lizards to ob- tain field measurements, it was noticed that males left a moist area on the transparent ruler. This moist area was directly in front of the \ent and was discolored in relation to other areas anterior to it on the alxlomen. At first the moist- ness was suspeeted to l)e from the normal cloaca) discharges; however, careful checking deter- mined it to be a glandular secretion which darkened the scales in the pre-anal area of adult males during tlie eopulator\' period. Histological sections of adult males show that there is indeed a gland just anterior to the cloaca, under the epithelial tissue—a duct gland, with cells lining a lumen. The details are presented in a separate report (Burkholder and Tanner, 1974). Color in Males Adult males are most brilliantly colored from April until mid- or late July. During this time, the ventral and ventrolateral portions of the head, neck, lateral and ventral
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