LIST OF ILLUSTRATIONS. Vll 



Page 

 Fig. 55.—Plesiocheli/s valdensis, Lydekker (carapace) ; Wealden, Isle of 



Wight 41 



„ 56. — Flatychelys olerndorferi, Wagner (carapace) ; Lithographic 



stone, Bavaria . . . . . . . • • • • • . . 42 



^^ 57. — Chelone (?) Benstedi, Mantell, sp. (carapace) ; L. Chalk, Kent 43 



„ 58. — Miolania Owenl, A. S. Woodw. (skull and tail-sheath) ; 



Newer Tertiary, Australia . . . . . . . . . . 43 



„ 59. — Logger-head Turtle {Thalassocheh/s caretia, Linn, sp.) ; 



Recent 44 



„ 60. — P*epAo(Zfr»j« «Z^«»Hw, Meyer (carapace) ; Trias, Bavaria .. 45 



„ 61. — CryptocUdus Richardsoni, Lydekker, sp. (vertebra) ; Oxford 



Clay, Weymouth 46 



„ 62. — Plesiosaurus Bawkiiisi, Owen (pectoral girdle) ; L. Lias, 



Street, Somerset . . . . . . • • • • • • . . 46 



„ 63.— Sauropterygian Mandibles (A, Peloneustes philarcJms, Seeley, 

 sp., from Oxford Clay ; B. Thaumatosatirus indicns, Lydek- 

 ker, from Upper Jurassic, India ; and C, Plesiosaurus dolicho- 

 dirtis, Conyb., from L. Lias, Lyme Regis) . . . . . . 47 



„ 6-i.— Cri/ptocUdus oxonieiish, Phillips.sp. (skeleton) ; Oxford Clay, 



Peterborough . . . . . . . • • • • • . . 48 



^^ 65.— Skeleton of P/e*('o«oK/-((5, restored ; L. Lias, Lyme Regis .. 49 



^_ 66. — Polyptychodon interrvptns, Owen (tooth) ; Greensand, Cam- 

 bridge . . . . . • • . • • • • • • . . 50 



„ 67.— Peloneustes philarchus, Seeley, sp. (tooth) ; Oxford Clay, Bed- 

 ford 50 



,, 68.— Plesiosaurus Sawk ins i, Owen (vertebra) ; L. Lias, Lyme Regis 50 



,, 69. — Lariosaurus Balsami, Curioni (skeleton) ; Muschelkalk, 



Perledo . . . . . . . . • • • • • • . . 51 



„ 70. — JVofhosaurus mirabilis, Miinster (palate) ; Muschelkalk, 



Germany . . . . . . . . • • • • • • . . o- 



„ 71. — Nothosauras mirabilis, Miinster (side view of skull) ; Mus- 

 chelkalk, Germany . . . . • • • • • • . . 52 



„ 72.— 3Iesosaurus tenuidens, Ger\&is (pectoral limb) ; Karoo System, 



South Africa . . . . . . • • • • • • . . 53 



„ 73. — Conchiosaurus clavatus, Meyer (humerus) ; Muschelkalk, 



Nurnberg.. .. .. .. •• •• •• ..53 



^, 74.— Ci/amodus (Placodiis) laticeps, Owen (skull) ; Muschelkalk, 



Baireuth 54 



,, 75. — Z)/c</«o(fo» (palate) ; Karoo System, South Africa .. .. 56 



,, 76. — Lateral view of skulls of (A), Dicynodon lacerticeps, Owen, 



and (B), Oudenodon Paini, Owen; ibid. .. .. •• 57 



,, 77. — Tapinocephalus ^4<Aer*^o«e/, Owen (vertebra) ; ibid.. . .. 58 



,, 78. — Gal esaurus planiceps, Owen {sk\i\\) ; ibid. ,. .. •• 58 



,, 79. — i\rao*rt«;-MS cZat)/.5rer, Cope (vertebra) ; Permian, Texas .. 59 



„ 80. — Mlurosaiirus felinus, Owen (skull) ; Karoo System, South 



Africa . . . . . . . • . . . • • • . . 59 



„ 81. — Empedias molaris, Cope (skull) ; Permian, Texas . . . • CO 



