LIST OF ILLUSTRATIONS xxix 



FIG. PAGE 



466. Mysis oculata 567 



467. Diastylis 568 



468. Gammarus 569 



469. Asellus 570 



470. Amphipoda 571 



471. Isopoda . 572 



472. Shrimp and Prawn 573 



473. Scyllarus arctus 574 



474. Pagurus bernhardus 574 



475. Cancer pagurus 575 



476. Typical Brachyura 576 



477. Squilla 577 



478. Orchestia cavimana, anatomy 579 



479. Euphausia pellucida 580 



480. Nervous system of Crab 581 



481. Cypris-stage of Lepas 583 



482. Larvae of Crabs 584 



483. Diagram illustrating the mutual relationships of the orders of 



Crustacea 588 



484. Dalmanites and Phacops 589 



485. Triarthrus becki 590 



486. Peripatus capensis 591 



487. ,, ventral view of head 592 



488. ,, anatomy 593 



489. ,. tracheal pit 593 



490. ,. nephridium 594 



491. ,, novae zealandise, development 595 



492. ,, capensis 596 



493. Scolopendrella immaculata .- 598 



494. Scolopendra 599 



495. Lithobius forficatus 599 



496. Pauropus huxleyi 600 



497. Strongylostoma, development 602 



498. Periplaneta orientalis 604 



499. ,, mouth-parts 605 



500. ,, americana, lateral view of head 605 



501. ,, muscular system 607 



502. anatomy 608 



503. ,, salivary glands 609 



504. Trachea of caterpillar 610 



505. Periplaneta, tracheal system 610 



506. ,, nervous system . . . 611 



507. ,, male reproductive organs . . ... . .611 



508. ,, female reproductive organs . . . . . .611 



509. Segmentation of ovum of Insect 612 



510. Ventral plate of embryo Cockroach 614 



511. Embryo Cockroach 614 



512. Lepisma 616 



