LIST OF ILLUSTRATIONS xxix 



FIG. PAGE 



461. Gammarus ... . 584 



4(52. 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 



475. Larvre of Crabs . . . 600 



476. Diagram illustrating the mutual relationships of the orders of 



Crustacea . (504 



477. Dalmanites and Phacops . . 605 



478. Triarthrus beckii . . 606 



479. Peripatus capensis 607 



480. ,, ,, ventral view of head 607 



481. ,, anatomy 608 



482. ,, trachea! pit .......... 609 



483. ,, nephridium .... 610 



484. ,, riovse zealandite, development ... . 611 



485. ,, capensis .... 613 



486. Scolopendrella immaculata ... . 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 . 029 



503. Ventral plate of embryo Cockroach . . . . . 030 



504. Embryo Cockroach . . . 630 



505. Lepisma . 632 



506. Podura . 632 



507. Locusta . . ... 633 



508. Ephemera ... . . 033 



