LIST OF ILLUSTRATIONS xxix 



FIG. PAGE 



466. Mysis oculata . 567 



467. Diastylis ... . .568 



468. Gammarus. ... . 569 



469. Asellus ... . .570 



470. Amphipocla . . . .571 



471. Isopoda ... ." 572 



472. Shrimp and Prawn 573 



4715. 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 



