http://www.biodiversitylibrary.org/ Malacologia. [Ann Arbor,Institute of Malacology]1962- http://www.biodiversitylibrary.org/bibliography/12920 v.32 (1990-1991): http://www.biodiversitylibrary.org/item/47352 Page(s): Page 131,Bieler & Petit, Page 132, Page 133, Page 134, Page 135, Page 136, Page 137, Page 138, Page 139, Page 140, Page 141, Page 142, Page 143, Page 144, Page 145 Contributed by: Harvard University, MCZ, Ernst Mayr Library Sponsored by: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library Generated 20 September 2013 12:30 AM http://www.biodiversitylibrary.org/pdf4/020073700047352