XIV 



ILLUSTRATIONS. 



FIGUEE PAGE 



83. Deep muscles of left thigh of 



M ana esculenta . . .100 



84. Do. (Dorsal view) . . .101 



85. Left half of pelvis of Bana es- 



culenta .... lOI 



86. Muscles of the right leg and 



foot of Rana esculenta (Dor- 

 sal view) .... 103 

 87- Do. (seen from below) . . 105 

 88. Do. (Dorsal view) . . . 106 

 89-91. Muscles of the plantar sur- 

 face of foot of Rana escu- 

 lenta . . . 107, III, 112 

 92-94. Dorsal view of muscles of 

 foot of Rana esculenta 



115, 117, iiS 



95. Pectoral region of Rana es- 



culenta . . . .119 



96. Hind portion of back and thigh 



of Rana esculenta . .120 



97. The nervous system of Rana 



esculenta, from the ventral 

 surface . . . .136 



98. Dorsal view of brain of Rana 



esculenta . . . • 143 



99. Transverse section through 



hinder end of Medulla ob- 

 longata . . . '144 



100. Do. at the point of origin of 



the abducens nerve . • 14.') 



101. Do. of the auditory nerve . 146 



102. Ventral view of brain of Rana 



esculenta .... 149 



103. Lateral do. . . . -150 



104. Transverse section through the 



anterior portion of the optic 

 lobes opposite the origin of 

 the motor-oculi nerve . .151 



105. Horizontal section through the 



brain to show the ventricles 153 



106. Section through the lower di- 



vision of the pituitary body 157 

 107- Transverse section through the 

 hinder portion of the cere- 

 bral hemispheres . .158 



108. Transverse section near the 



middle of the cerebral hemi- 

 spheres . . . .158 



109. From a transverse section 



through one of the cerebral 

 hemispheres . . , 159 



110. Diagram to show the Vena 



spinalis posterior, etc. . .164 



111. Dorsal view of the orbit, etc. 



(deep dissection) {coloured) 



Plate L 



112. Do. (superficial do.) {coloured) 



Plate L 



113. View of roof of mouth ; mu- 



cous membrane,etc. (co^o«re(?) 



Plate I. 



114. Lateral dissection of head, etc. 



{coloured) Plate I. 



FIGURE PAGE 



115. Dissection of the floor of the 



mouth {coloured) Plate I. 



116. Eight half of skull of Rana es- 



culenta . . . .174 



117. The nervous system of Rana 



esculenta, from the ventral 

 surface . . . .176 



118. Ventral view of the brain and 



spinal cord, to show the 

 points of exit of the spinal 

 nerves . . . .178 



119. Ventral view of the spinal 



ganglia . . . «179 



120. Schema of spinal ganglion . 179 



121. Dorsal branches of the spinal 



nerves . . . . iSi 



122. The brachial plexus . . .184 



123. 124. Nerves of the ventral sur- 



face of the arm . . 185,186 



125. The N. radialis . . .186 



126. Ventral view of the brain and 



spinal cord . . . .188 



127. The sciatic plexus . . . 190 



128. Distribution of the sciatic nerve 193 



129. Nerves of the leg and sole of 



the foot . . . -194 



130. Distribution of the N. peron eus 196 



131. Sympathetic cord . . .198 



132. The heart and blood-vessels, 



seen from the ventral sur- 

 face . . . . .213 



133. The heart, seen from above . 214 



134. The frog's heart, seen from the 



ventral surface . . -215 



135. Dissection of a case in which the 



auricular septum is placed 

 more to the left than is 

 normal . . . .215 



136. Dissection of the heart from the 



left side . . . .216 

 137 I. Transverse section through 

 the junction of the hinder 

 and middle thirds of the 

 ventricle of JZ. temporaria . 217 

 137 II. Tranverse section through 

 junction of the middle and 

 anterior thirds of the same 

 heart . . . . .217 



138. Portion of a transverse section 



through the middle of the 

 ventricle of 7?. temporaria . 218 



139. Course of the cardiac nerves in 



the auricular septum . .219 



140. Group of nerve-cells on the car- 



diac nerve, from the auri- 

 cular septum . . .220 



141a!. Small group of nerve-cells from 



the auricular septum . .221 



1416. Isolated nerve-cells from frog's 



heart . . . . .221 



142. Arteries and veins of the 

 Truncus arteriosus of Biifo 

 vulgaris . . . .222 



