560 



FOSSIL TURTLES OF NORTH AMERICA. 



Plate 30. 



1. Toxochelys sp. indet. Neurals 2 to 8, suprapygal, pygal and peripherals. X 0.6. Speci- 



men in coll. Kansas Univ. 



2. Toxochelys sp. indcl. Neurals and suprapygal of same specimen, lateral view. X 0.6. 



Plate 31. 



1. Toxochelys brachyrhina. Skull forming type, lower surface. X 0.5. Type in coll. Kansas 



Univ. 



2. Porthochelys laticeps. Carapace of type. X %. Type in coll. Kansas Univ. 



3. Porthochelys laticeps. Plastron of type. X %. 



Plate 32. 



1. Syllonms crispatus. Distal half of costal of type. X 0.8. No. 6134 A. M. N. H. 



2. Syllomus crispatus. Part of costal of type. X 0.8. 



3. Chelonia parvitecta. Costal forming type. X 0.6. No. 1318 A. M. N. H. (On plate the 



size is wrongly given as %.) 



4. Basilemys variolosa. Front of plastron. X y 3 . From photograph by Lambe. Specimen 



in coll. Geol. Surv. Canada. 



5. Basilemys imbricaria. Fragment of costal of type. X 1. No. 6102 A. M. N. H. 



6. Basilemys imbricaria. Fragment of costal of type. X 1. 



7. Basilemys imbricaria. Fragment of costal of type. X 1. 



Plate 33. 



1. Basilemys sinuosa. Carapace of type. X 0.2. From photograph furnished by Field Mus. 



Nat. Hist. 



2. Basilemys sinuosa. Plastron of type. X 0.2. 



Plate 34. 



1. Basilemys variolosa. Part of seventh peripheral of type, to show sculpture. X 1. No. 



1465 A. M. N. H. 



2. Compsemys victa. Fragment of costal, to show sculpture. X 1. 



3. Compsemys victa. Right eighth costal. X 1. No. 6096 A. M. N. H. 



4. Compsemys obscura. Supposed second left costal. X 1. Specimen in A. M. N. H. 



5. Adocus punctatus. Upper surface of xiphiplastron of type. X 0.25. Yale Univ. coll. 



6. Adocus beatus. Plastron. X 0.25. Coll. A. M. N. H. 



7. Adocus beatus. First right peripheral of same specimen. X 0.5. 



8. Adocus lacer. Nuchal, 3 peripherals and part of costal. X 0.25. No. 1350 A. M. N. H. 



Plate 35. 



1. Adocus punctatus. Carapace of type. X 0.25. Yale Univ. coll. 



2. Adocus punctatus. Plastron of type. X 0.25. 



Plate 36. 



1. Adocus lacer. Plastron of type. X 0.25. No. 1350 A. M. N. H. 



2. Adocus syntheticus. Plastron of type. X 0.2. No. 1466 A. M. N. 1 [. 



3. Adocus agilis. Plastron of type. X 0.2. No. 1466 A. M. N. II. 



4. Adocus petrosus. Right hypoplastron and two peripherals. X 0.5. No. 1482 A. M. N. H. 



Plate 37. 



1. Agomphus turgidus. Portion of plastron of type. X 0.5. No. 1481 A. M. N. H. 



2. Agomphus turgidus. Both liyoplastrals, lower surface. X 0.5. No. 1479 A. M. N. H. 



3. Agomphus turgidus. Same bones seen from in front. X 0.5. 



4. .-liium pints turgidus. Eighth, ninth and tenth, right peripherals of type. X 0.5. 



5. Agomphus turgidus. Fourth neural and proximal ends of four costals of type. X 0.5. 



6. Agomphus petrosus. Two peripherals and part of costal of type. X 0.5. No. 1482 



A. M. N. H. 



7. Agomphus petrosus. Fourth and fifth right costals of type. X 0.5. 



