. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SlBYNOMORPHUS (COLUBRIDAE) IN PERU AND ECUADOR • Cddle 247. Figure 39. Hemipenis of Sibynomorphus vagus in sulcate view (MCZ 17421). This hemipenis was manually everted with methods detailed by Myers and Cadle (2003). pocket. The hemipenis proximal to the en- circling battery of spines is ornamented with minute spines everywhere except within the nude pocket. Everted Hemipenis. The left hemipenis of MCZ 17421 (adult male, 368 mm SVL) was everted from the preserved specimen with the use of techniques described
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SlBYNOMORPHUS (COLUBRIDAE) IN PERU AND ECUADOR • Cddle 247. Figure 39. Hemipenis of Sibynomorphus vagus in sulcate view (MCZ 17421). This hemipenis was manually everted with methods detailed by Myers and Cadle (2003). pocket. The hemipenis proximal to the en- circling battery of spines is ornamented with minute spines everywhere except within the nude pocket. Everted Hemipenis. The left hemipenis of MCZ 17421 (adult male, 368 mm SVL) was everted from the preserved specimen with the use of techniques described by Myers and Cadle (2003) (Fig. 39). Before eversion, the hemipenis extended to the suture between subcaudals 9 and 10. It was slightly bilobed, dividing at the suture between subcaudals 7 and 8. Total length of the organ was mm, divided for approx- imately 2 mm. The retractor muscle was di- vided for approximately mm, each tip inserting onto a lobe of the hemipenis. At the distal end of the inverted hemipenis, a fold of the tissue that would form die apex of the everted organ extends between the inverted lobes. Consequently, the distal end of the inverted organ was ratiier trilobed, with a fold of the capitular tissue extending posteriorly between the branches of the di- vided retractor muscle, and larger than ei- ther lateral lobe (, tissue that would be- come the lobes of the everted organ). The folding of the apical tissue is perhaps only a convenient way of accommodating tissue that is incorporated into the expanding api- cal region of the everted organ; it has no apparent counterpart in the everted organ. This peculiar structure was not noted in the above-described inverted hemipenis (MCZ 17422). The everted organ was 15 mm in length and the sulcus spermaticus was divided for 7 mm. The hemipenis is fully capitate, with only a very slight indication of bilo- bation (perhaps nonbilobed if fully ex- panded and inflated, which was not at- tempted because of th
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