ie 
LIST OF FIGURES. 
PLATES I.—XXV. with a List, will be found at 
end of the Book. 
FIGURE. 
I. Parts of the body (Ozdiscus asellus) ets oe 
2. The first antenna (Ovedscus asellis) os ae 
3. The second antenna (Oviseus ascllis) ae an 
4. The underside of the head (Ondscus asellus) .. are 
5. ~The mandibles (Ovedscas asellus) .. ee oe 
6, The first maxillae (Onzscus asellus) HG Bt 
>. The second maxillae (Onzscus asellits) as os 
8. The fused maxillipeds (Onzscus asellis) of 30 
9g. The ‘upper lip ” (Ontscus asellus) ais ae 
10. The “lower lip ” (Ovzsczs asellus) ae af 
11, A typical thoracic segment (Ov/scus asellus) .. on 
12, The fifth thoracic segment of a female (Ovzycus asellus) .. 
13. The underside of the abdomen of a female (Ovedseus asellits) 
14, <A typical abdominal appendage (Ontscis asellis) ig 
15.. The first abdominal appendage of the male (Ovzscus asellis) 
16, The second abdominal appendage of the male (Ovdscus 
asellus) sie ¢ oe Be 
17. The alimentary canal (Ondscus asellus) ats fe 
11. The circulatory system (Ovzscus asellits) By ar 
19. The nervous system (Oxzsszs asellis) ae ae 
20. Female reproductory organs (Ovtscus asellus) wis 
21. The male reproductory organs (Ovdéscus asellis) ay 
22. The fertilized egg (Purcellio scaber) after roule BD 
23. The fertilized egg seen in section (/%orcellio scaber) after 
Roule Bt ee as ae 
24 to 31. The development of a woodlouse (Furcellio scaber) 
after Roule Alo Bb Gi me 
32. Embryo of the woodlouse showing the three divisions of the 
intestine separately developed (Porcellio scaber), after 
Teoulesz es o3 e 5 dio 
33. Embryo of the woodlouse showing traces of the seginents 
(Porcellio scaber), after Roule .. Ste ate 
34. Anembryo woodlouse ready tobe hatched (Porcelliv scaber) 
after Roule 36 of Bic ye 
35. Flagellum and last peduncular joint of the antenna of Zzgza 
oceanica .. Oo ne 50 
36. Flagellum and last peduncular joint of the antenna of 
Ligidium hypnorune 56 ote A 
37. Flagellum and last peduncular joint of the antenna of 
Trichoniscus pusillus or a Ms 
38. Flagellum and last peduncular joint of the antenna of 
Trichoniscus vividus ie rep ine 
39. Flagellum and last peduncular joint of the antenna of 
Trichoniscus roseus pi ete is 
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