. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. LOOMIS: NEW CAVE AND EPIGEAN MILLIPEDS 389 tion of the normal number of additions thereto, which make it impos- sible to determine with exactness the point of transition from the anterior segment crests to the full complement of the mid-body region, although this transition appears to take place at about segment 12 as with two of the other species in which the transition has been noted. Differing from other members of the genus and even of the family in the increase over the normal number of crests of the primary and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. LOOMIS: NEW CAVE AND EPIGEAN MILLIPEDS 389 tion of the normal number of additions thereto, which make it impos- sible to determine with exactness the point of transition from the anterior segment crests to the full complement of the mid-body region, although this transition appears to take place at about segment 12 as with two of the other species in which the transition has been noted. Differing from other members of the genus and even of the family in the increase over the normal number of crests of the primary and secondary crests on the posterior segments where both classes of crests are readily distinguished, especially since only the primary crests. Fig. 8. Spirostrephon magnum. outer lateral view. a, Gonopods, anterior view; b, Gonopod, have a posterior seta; on from 8 to 12 segments preceding the anal segment there are consistently four primary and five secondary crests between the median line and the poriferous keel on either side of the body whereas the customary number for other species is three primary and four secondary crests although increased numbers may at times be found which are not constant for the species; all dorsal crests are slender, moderately elevated with apex smooth and shining, the lower sides and intervals between the crests finely granular; pore area oc- cupying the anterior half of the keels at the front of the body but becoming more extensive farther back, eventually occupying the en- tire outer margin; below the poriferous keels are two high crests, much more prominent than the dorsal primary crests, and these are to be seen in dorsal view, each terminating in a sharp, slightly produced,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. C
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