. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 246 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5. Figure 37. Sibynomorphus vagus. Dorsal views of heads. Top to bottom: KU 219121, MCZ 17422, MCZ 17421. The dark spots or smudges on the parietal scales are characteristic of most specimens of S. vagus. time); these are much more boldly marked than S. vagus. Hemipenis Inverted Hemipenis. The following de- scription of the inverted organ of Sibyno- morphus vagus is based on MCZ 17422 (adult male, 291 mm SVL). The hemipenis extends to the level of the
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 246 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5. Figure 37. Sibynomorphus vagus. Dorsal views of heads. Top to bottom: KU 219121, MCZ 17422, MCZ 17421. The dark spots or smudges on the parietal scales are characteristic of most specimens of S. vagus. time); these are much more boldly marked than S. vagus. Hemipenis Inverted Hemipenis. The following de- scription of the inverted organ of Sibyno- morphus vagus is based on MCZ 17422 (adult male, 291 mm SVL). The hemipenis extends to the level of the suture between subcaudals 10 and 11. It is slightly bilobed, dividing at the level of the suture between subcaudals 9 and 10. Total length of the organ 15 mm, divided distally for 2 mm. The major retractor muscle is divided for approximately 1— mm at its insertion. The organ is ornamented with minute Figure 38. Sibynomorphus vagus. Lateral views of heads. KU 219121 (top), MCZ 17422 (bottom). spines basally and distally is fully capitate. The capitulum is ornamented with papil- late calyces. The sulcus spermaticus (in the dorsal wall of the organ) divides within the capitulum at the level of the distal portion of subcaudal 4; its branches end at the dis- tal tips of the lobes. The undivided portion of the sulcus spermaticus is 6 mm long; its divided portion is mm long. Proximal to the capitulum, a battery of spines completely encircles the hemipenial body. The battery is three spines in width adjacent to the sulcus spermaticus and broadens to four or five spines wide on the asulcate side. A very long basal nude pock- et, mm in length, extends in the dor- somedial wall of the organ (lateral surface in the everted condition) from the base of the hemipenis to the battery of spines. The distal end of the pocket is nested within the battery of spines. The asulcate edge of the pocket is bordered by a prominent lobe extending from the base to the mid- point of the pocket.
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Keywords: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
