356 QUESTIONS. 



116. What is the condition of the ambulacral system, and where is the 

 * madreporiform tubercle " situated ? 



117. What is the mouth surrounded by? 



118. What is the " respiratory tree " of the Holothurians ? 



119. What characters distinguish the Scolecida ? How are they separated 

 from the Echinoderms ? 



120. What is meant by the term Entozoa? 



121. In what relation do the Bladder-worms stand to the Tape-worms ? 



122. What is the structure of an ordinary Tape-worm? 



123. Give the structure of the "head" and of a single joint, and state 

 what is the relation of the head to the joints. 



124. State shortly the process of development in a Tape-worm. 



125. What is the " measles " of the Pig ? 



126. What are " hydatids " in man ? 



127. What are the characters of the Trcmatode worms? Mention an ex- 

 ample. 



128. What is the " rot " of Sheep caused by ? 



129. What groups of animals are included in the lurbellaria? 



130. Give an example of the Acanthocephala, and state the character from 

 which the name is derived. 



131. Where do the Gordiacea spend the earlier part of their existence, 

 and what is their common name ? 



132. Mention examples of the Nematode worms. 



133. From what do the Wheel-animalcules get their name ? 



134. What is the general size of the Rotifers, and where are they found ? 



135. What marked differences are there between the males and females ? 



136. What are the functions of the ciliated "wheel? " 



137. Give the general anatomy of a Rotifer. 



138. Give the leading characters of an Annulose animal. 



139. Into what great divisions is the sub-kingdom Annulosa divided, and 

 what are the characters of these ? 



140. What is the general structure of one of the rings of an An- 

 nelifle ? 



141. What is the " pseudohaemal system " of the Annelida, and to what 

 is it believed to correspond ? 



142. What are the characters of the Hirudmea* 



143. To what does the Medicinal Leech owe its value ? 



144. How is locomotion effected in the Leeches ? 



145. How are the Oligochceta distinguished? 



146. What are the locomotive organs of the Earth-worm ? 



147. Of what nature are the breathing-organs of the Tubicola, and where 

 are they placed ? 



148. Mention a common Tubicolous Annelide. 



149. To what do the Errantia owe their name, and what are their loco- 

 motive organs ? 



150. Where are the gills placed in the Errantia? 



151. What orders of Annelida possess gills, and which have not ? 



152. Give the general characters of Articulate animals. 



153. Give the characters of the Crustacea. 



154. How many segments go to the body of a Crustacean, and into what 

 distinct regions may these be distributed ? 



155. What is understood by the " cephalothorax ? " 



156. To what section of Crustacea does the Lobster belong ? 



157. What is the "carapace" of the Lobster ? 



