THE CARNIVOROUS SLUGS OF SOUTH AFRICA. 2()3 



Fig. 82. — X 50. A. dimidia; transverse section through retracted 

 upper tentacle, showing posterior part of eye. 



Fig. 83. — x 50. A. dimidia; transverse section through retracted 

 upper tentacle just behind eye. 



Fig. 84. — x 50. A. dimidia; transverse section through retracted 

 upper tentacle behind eye. 



Fig. 85. — x 50. A. dimidia; transverse section through retracted 

 upper tentacle considerably behind eye. 



Fig. 86. — X 50. A. dimidia; transverse section through retracted 

 upper tentacle at entrance of olfactory and optic nerves. 



Fig. 87. — x 60. A. sexangula; longitudinal section through 

 mouth. 



Fig. 88. — x 60. A. dimidia; transverse section through mouth. 



Fig. 89. — x 118. A. dimidia; transverse section through radula 

 sac. 



Fig. 90.— X 118. A. dimidia; transverse section through part of 

 odontophoral support. 



PLATE XVII. 



Fig. 91. — x 2|. Apera gibbonsi s.s.; side view of odontophore 

 without its sheath. 



Fig. 92. — x 21. A. gibbonsi s.s.; longitudinal section of odon- 

 tophore. 



Fig. 93. — x 2. A. gibbonsi rubella; doi-sal view of odontophore 

 without its sheath. 



Fig. 94. — x 2. A. gibbonsi rubella; ventral view of odonto- 

 phore without its sheath. 



Fig. 95. — X 2. A. gibbonsi rubella; dorsal view of odontophoral 

 support. 



Fig. 96. — x 2. A. gibbonsi rubella; side view of radula with 

 its retractor muscles. 



Fig. 97. — X 2. A. gibbonsi rubella; side view of radula without 

 its muscles. 



Fig. 98. — X 2. A. gibbonsi rubella; side view of radula without 

 its muscles (retracted). 



Fig. 99. — X 3. jA. gibbonsi lupata; side view of radida without 

 its muscles. 



Fig. 100. — X 5. A. parva; dorsal view of odontophoral support. 

 Fig. 101. — X 5. A. parva ; side view of radula with its retractor 

 muscles. 



