LIST OF ILLUSTRATIONS 



KKi. 



1'AOE 



424. Shrimp and Prawn 



425. Scyllarus arctus . 539 



4 2 ' . 1 'agurus 1 )ernhardus 539 



427. Cancer pagurus . . 54 



428. Typical Brachyura 541 



420. Squilla 542 



430. Diastylis stygia . 543 



431. Gammarus neglectus . .... . 544 



4.'52. Asellus aquaticus 545 



433. Various Amphipoda ... . 546 



434. ,, Isopoda 546 



435. Orchestia cavimana, anatomy 548 



436. Euphausia pellucida 549 



437. Nervous system of Crab 550 



438. Cypris-stage of Lepas 552 



439. Larvse of Crabs 554 



440. Diagram illustrating the mutual relationships of the orders of 



Crustacea 557 



441. Dalmanites and Phacops . . 558 

 441 />/'.s. Triarthrus beckii . . 559 



442. Peripatus capensis ... 560 



443. ., ,, ventral view of head . . . . . 560 



444. ., anatomy . . 561 



445. ., edwardsii, nephridium 563 



446. ,, iiovsezealandise, development 564 



447. ,, capensis ., 565 



448. Scolopendrella immaculate . . 567 



449. Scolopeiidra 568 



450. Lithobius forficatus . . . .568 



451. Pauropus huxleyi 569 



452. Strongylostoma, development . . .... 570 



453. Periplaneta americana ... 572 



454. ,, mouth-parts . . 573 



4-"),"). . , americana, lateral view of head 573 



456. .. muscular system 575 



457. ,, anatomy . . . 576 



458. , , salivary glands . 577 



459. Trachea of caterpillar . . 577 



460. Periplaneta, tracheal system ... 578 



461. , , nervous system 578 



4(51.'. ., male reproductive organs 579 



4(>3. ,, female reproductive organs 579 



4;4. Segmentation of ovum of Insect . . . . . . . . 580 



ir>f>. Ventral plate of embryo Cockroach 581 



466. Germinal layers and amnion of Insect 582 



467. Li-pisma 582 



-tr.s. n.,1 lira . 584 



ir.'J. Locusta . 584 



470. Ephemera . . 584 



