. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Bulletin, So. Calif. Academy of Sciences Vol. 54, Part 1, 1955 AN IMPORTANT NEW LAND-SNAIL FROM THE MISSION RANGE, MONTANA By S. Stillman Berry Redlands, California Amid one of the wildest and grandest of North American land- scapes nestles lovely McDonald Lake1 in the majestic Mission Range of western Montana. The steep slopes to the north of the lake are largely preoccupied by a great tumbling talus of sharp limestone fragments which is noted among malacologists as the type-locality of the b
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Bulletin, So. Calif. Academy of Sciences Vol. 54, Part 1, 1955 AN IMPORTANT NEW LAND-SNAIL FROM THE MISSION RANGE, MONTANA By S. Stillman Berry Redlands, California Amid one of the wildest and grandest of North American land- scapes nestles lovely McDonald Lake1 in the majestic Mission Range of western Montana. The steep slopes to the north of the lake are largely preoccupied by a great tumbling talus of sharp limestone fragments which is noted among malacologists as the type-locality of the beautiful Oreohelix elrodi (Pilsbry)2. From this selfsame magnificent setting now emerges another new and important snail, less spectacular indeed than that of Elrod, but in its way as unique, and like the former quite unknown from outside this one secluded canyon. Discus (Gonyodiscus?) brunsoni new species (Plates 7, 8) Description: Shell large for the genus, thin, depressed-conic, with low spire, its slopes weakly convex. Whorls about five and a half, decidedly compressed, moderately rounded both above. PLATE 7 Figs. 1-3. Discus (Gonyodiscus ?) brunsoni Front, apical, and basal views of holotype from locality illustrated in Plate 8; x 3/2-4. xThis small lake is not to be confused with the not very distant and much larger Lake McDonald in Glacier National Park. 2 See Elrod, 1902: 110-112, 114-117, pi. 29. 17. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
Size: 1875px × 1332px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, books, booksubjectnaturalhistory
