TABLE OF CONTENTS. VU 



PAQBS 



Chapter XIV. The Type Akachnida 435-468 



The General Characteristics of the Type, pp. 435-441. Descrip- 

 tion of the Various Orders, pp. 441-456. The Phylogeny 

 of the Arachnida, pp. 456-458. Synoptical Classification, 

 pp. 458, 459. Literature, pp. 459, 460. The Order Penta- 

 stomidse, pp. 461-463. The Order Pycnogonida, pp. 463- 

 466. The Order Tardigrada, pp. 466-468. Literature, p. 

 468. 



Chapter XV. The Type Tbacheata 469-530 



The General Characteristics of the Type, pp. 469-474. The 

 Class Protracheata, pp. 474-480. The Class Myriapoda, 

 pp, 480-487. The Class Insecta, pp. 487-533. The Phy- 

 logeny of the Tracheata, pp. 533-525. Synoptical Classifi- 

 cation, pp. 535-538. Literature, pp. 538-530. 



Chapter XVI. The Type Echinoderma 531-595 



The General Characteristics of the Type, pp. 531-540. The 

 Class Crinoidea, pp. 541-551. The Class Asteroidea, pp. 

 553-560. The Class Ophiuroidea, pp. 561-570. The Class 

 Echinoidea, pp. 570-584. The Class Holothuroidea, pp. 

 584-590. The Phylogeny of the Echinoderma, pp. 590- 

 593. Synoptical Classification, pp. 593, 593. Literature, 

 pp. 593-595. 



Chapter XVII. The Type Protochordata 596-641 



The Class Hemichorda, pp. 596-608. The Class Cephalochorda, 

 pp. 608-618. The Class Urochorda, pp. 618-639. Synop- 

 tical Classification, pp. 639, 640. Literature, pp. 640, 641. 



Index of Proper Names 643-653 



Index op Subjects 654-661 



