FISHERY BULLETIN: VOL. 78, NO. 2 







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Figure 3. — Endometrium of immature Stenella longirostris (no. 3, Table 2). Tubular glands, little folding, thin endometrium, no 



secretion or mitoses (hematoxylin and eosin x 60). 



because of their size and the presence of at least 

 one corpus albicans. They were not lactating nor 

 did they possess a corpus luteum. The appropriate 

 measurements are set forth in Table 3. In general, 

 the horns were asymmetrical but not so markedly 

 as those of lactating females (Group V), with the 

 exception of specimen no. 4 (Table 3). The wrin- 

 kled serosa and congestion of endometrium of this 

 animal's left horn indicated recent pregnancy 

 (Figure 4). All but one female of this group had 

 "stretch marks" which we assumed to be an indi- 

 cation of previous pregnancy. Microscopic study of 

 the corpora albicantia in this group allowed some 

 correlation with the endometrial findings. Thus, 

 the apparently most recently delivered uterus 



(Figure 4) had a still cellular corpus albicans (Fig- 

 ure 5) and, inflammatory cells, hemosiderin mac- 

 rophages and stromal hyalinization were observed 

 in the congested endometrium (Figure 6). In the 

 others, judged to have had past pregnancies, the 

 corpus albicans was less cellular, more hyalinized 

 and shrunken. The endometrium did not appear to 

 be stimulated, had thin epithelium, no mitoses but 

 scattered macrophages were in the process of re- 

 moving debris. Apparently later still, Graafian 

 follicle development commences, uterine horns 

 are of nearly equal size and endometrial glandular 

 redevelopment occurs with mitoses, glandular 

 convolutions, occasional epithelial vacuoles, and 

 stromal edema (Figure 7). 



Table 3. — Group II: Mature controls, Stenella longirostris, for 1976. 



510 



