LIST OF ILLUSTRATIONS xxix 



FIG. PAGE 



461. Gammarus .... 584 



4G2. Asellus . . 585 



403. Amphipoda 586 



464. Isopoda .587 



465. Shrimp and Prawn . . . . 588 



466. Scyllarus arctus 589 



467. Pagurus bernhardus ' 589 



468. Cancer pagurus 590 



469. Typical Brachyura 591 



470. Squilla 592 



471. Orchestia cavimana, anatomy 594 



472. Euphausia pellucida . . . 595 



473. Nervous system of Crab ...... . . . _. . 596 



474. Cypris-stage of Lepas . ..... , . . . . 598 



47~>. Larvae of Crabs . . . . .... ... - . . . . 600 



476. Diagram illustrating the mutual relationships of the orders of 



Crustacea 604 



477. Dalmanites and Phacops 605 



478. Triarthrus beckii 606 



479. Peripatus capensis . .... ; 607 



480. ,, ventral view of head . 607 



481. ,, anatomy ....... 608 



482. ,, tracheal pit . . . . 609 



483. ,, nephridium . . ... ....". . . .610 



484. ,, novae zealandise, development . . . . . 611 



485. ,, capensis . . - . . . 613 



486. Scolopendrella immaculata . . t ... . . . . .615 



487. Scolopendra . . . . . . . . . . . . 616 



488. Lithobius forficatus . . . . . 616 



489. Pauropus huxleyi . . . ., . . . . . . .617 



490. Strongylostoma, development . . 618 



491. Periplaneta orientalis . . . . . . . . . . 620 



492. ,, mouth-parts . . . .- . . . . . 621 



493. ,, americana, lateral view of head . . . . . 621 



494. ,, muscular system . . .... . . . 624 



495. ,, anatomy .......... 625 



496. ,, salivary glands 625 



497. Trachea of caterpillar . . .... . . .626 



498. Periplaneta, tracheal system . . 627 



499. ,, nervous system . . . . . 627 



500. ,, male reproductive organs 628 



501. ,, female reproductive organs 628 



502. Segmentation of ovum of Insect 629 



503. Ventral plate of embryo Cockroach 630 



504. Embryo Cockroach . 630 



505. Lepisma 632 



506. Podura . 632 



507. Locusta 633 



508. Ephemera 633 



