HERMIT CRAB AND PELTOGASTETJ. 621 



PLATE 34. 



Fig. 1. — Kegenerated appendages (1st and 2nd abdominal) of modified 

 male. The animal, which had only undergone one moult since operation, 

 regenerated appendages in a modified sense. 



Fig, 2. — Regenerated appendage (1st abdominal) of unmodified male. 

 (One moult after operation.) 



Fig. 3. — Transverse section through normal testis. Tubule with duct 

 stained with Delafield's hfematoxylin and eosin. spc. Spermatocyte. Duct 

 filled with spermatozoa {spz.). Objective 7*, ocular 2 of Koiistka. 



Fig. 4'. — Preparation of infected testis with Schneider's acelo-carniine. 

 Small and irregular spermatophores {sp.ph.) with much reduced numbers of 

 spermatozoa, sp.ph.c. Chitinous cap-part of sphermatophores. spc. Sperma- 

 tocytes, and ov-^, ov.^, two stages in the development of ova. Obj. 7*, oc. 5, 

 Koristka. 



i'lG. 5. — Transverse section through infected testis tubule. Stained with 

 borax carmine, ck. Irregular masses of chitin in the duct. Other lettering 

 as before. Obj. 7*, oc. 2, Koristka. 



Fig. 6. — Transverse section through recovering testis tubule. Reduced 

 number of egg-cells (possibly some resorbed) ; but o^o here represents a more 

 advanced state of development than in infected testes. Cytoplasm shows 

 reticular structure. Higher magnification than last. Stained with Mayer's 

 carmalum. Obj. 7*, oc. G, comp. Koristka. 



(The figures are drawn with Zeiss's camera lucida.) 



