20 



To what genus were they all referred? "What hypothof;is has 

 Leeu suggested by these remaius ? 



Class IV. Mammalia. — P. 385. 



What is the derivation of the term ? How many compart- 

 ments are in the heart ? What is said of the circulation as com- 

 pared with that of Itirds? How is respiration effected? How 

 are the lungs situated ? What is their stmcture ? What is the 

 characteristic covering of the Mammalia? What different as- 

 pects does it assume ? What is the usual number of feet ? What 

 term is from this circumstance often used as synonymous with 

 Mammalia? State some of the changes observable in the form or 

 number of the extremities. Is the number of joints or verlehrae, 

 in the spiual column uniform or not ? What is the number in 

 the neck of the Elephant ? What in that of the Giraffe ? What 

 peculiarity is observable in the head of the Tapir ? In that of 

 the Elephant? Of the Rhinoceros? Of the Giraffe? Of the 

 Stag ? What name is hence given to animals of tlie Deer tribe ? 

 What was the weight of the antlers in the "Irish Elk"? In 

 what space of time did they grow ? What difference of structure 

 Is observable in the horns of the Goat and the Ox, compared 

 with those of the Deer ? What name has from this circumstance 

 been given to these animals? Are the tusks of the Elephant 

 regarded as part of the dental system ? What teeth do they re- 

 present ? What size and weight do they attain ? What evidence 

 is there of the former abundance of Elepliants in Siberia ? What 

 is whale-bone ? What is its situation, and its use to the living 

 animal ? How many teeth lias man ? How are they called ? 

 How are thej' placed ? Are they absent in any species of Jlam- 

 malla ? Mention examples of difference in the number. What 

 lias been observed with regard to the adaptation of the teeth to 

 the food? What inference is thus suggested? Is there any in- 

 stance in nature of an incongruous union of parts? Can the 

 comparative anatomist venture to deduce the size, structure, 

 and habits of an extinct animal from a portion of its skeleton ? 

 Who led the way in this field of discovery ? What organs did 

 he regard as furnishing the surest basis for classification ? Into 

 how many Orders are the inferior animals now divided? How 

 is man classed ? Name the eleven Orders, and give an example 

 of each ? What is the estimated number of species ? How many 

 are British? How many are Iri.sh? What causes appear to in- 

 fluence the geographical distribution of animals? What does 

 L3-ell say of the Mammalia of North America ? 



ORnER Mahsupiata. — P. 397. — Wliat is the derivation of the 

 term? In wliat particular ])rior to birth do tlie young of this 

 group differ from otlier JIammalia? What animals are included 

 in the Order? Over what parts of tlie world are their remains 

 distributed ? Wliat is their food ? Wliat was the size of a young 

 Kangaroo mea.suied by Professor Owen ? What use is the poucli 

 of the mother? What diversity is shown in size? What name 

 is given to one section of the JIarsupial animals? Wliat does 

 the Echidna resemble? What are the peculiarilies of tiie Orni- 

 Utori/iicus ? What arc its habits? What are the habits of the 



