XX 



Page 

 56, Vein surrouuded by modified acini of the pancreas in Neropkis 



(squorius ..,...,, 199 



67. The construction of the " red "body " of Peristethus cataphractus . 202 



68. Diagram to explain the probable construction of the gas glands 



of Trigla gwnardus and Smarts maurii 207 



69. Diagrammatic transverse sections tbrough the anterior end of 



" red body " in ventral wall of bladder of Cepola ruhescens . . 213 



60. Vacuoles in the kidney cells of Neropkis 225 



61. Microphotograph of transverse section across thin region of gas 



gland of Perca, showing foam-like mass of bubbles on surface. 240 



62. Microphotograph of transverse section across thick region of gas 



gland of Perca, showing extruded gas bubbles on surface. 

 The " spent " condition of the cells is also shown , . 240 



63. Skull of the Anoa {Bos dejyressicorms) 250 



64. Front part of the skull of a Buffalo (Bos hubaliis) 251 



65. Front part of skull of the Urus (Bos j^rimigenius) 251 



66. Skull of a Urus in the Anatomical Museum, University of 



Edinburgh 252 



67. Front part of skall of American Bison 253 



68. Front and side views of the skull of a young foetal Ox 253 



69. Front view of a fcetal Ox skull about the fifth month, and front 



part of same skull 255 



70. Front view of Calf's skull at birth, and front part of same skull . 257 



71. Front part of skull of a polled Aberdeen- Angus Ox 258 



72. Skull of a Syrian Ox with vestigial horn-cores and a forehead 



like that of flat-polled Aberdeen-Angus cattle 259 



73. Front part of skull of polled Newstead Ox in which the upper 



end of the premaxilbie bifurcntes 261 



74. Front part of a horned NeAvstead skull in which the premaxillse 



are short and fail to reacli the nasals 262 



76. Front part of skull of a borned Cadzow Ox with notched pre- 



maxillse which fail to reach the nasals 263 



76. Front part of skull of a cross-bred Shorthorn in which the pre- 



raaxillte fail to reach the nasals 263 



77. Skull of polled Newstead Ox of the type, which, witli hoins, are 



sometimes said to belong to Bos frontosus Nilsson 264 



78. Eight half of occiput of the Aberdeen-Angus skull with long 



premaxilhe. Also a section of same 265 



79. Outlines of the occiput and part of the forehead of three Urus 



skulls 266 



80. Front view of skull of the Bison [Bos bkon) 267 



81. Hind part of skull of the Urus represented in text-fig. 66 268 



82. Frontlet and horn-cores of a small Newstead Ox with a 



prominent forehead 269 



83. Occiput of the Urus skull represented in text-figs. 66, 79, and 81. 270 



