430 ME. n. M. BEENAED ON THE CUEENETIDiE. 



The uppermost coil leads into the stercoral pocket, and its epithelial 

 cells are very irregular owing to their being highly Tacuolated. 

 0. Ovary. 

 Fig. 8. Horizontal section from a specimen infected by bacteria, h. Nests of 

 the parasite in the peritoneal cells, md. Muscle blood-passages as in 

 fig. 6, but much distended with coagulated blood. Between the di- 

 gesting cells, the crystal-like faical bodies (./') have accumulated in- 

 stead of streaming out between the cells, civ. Dorso-ventral muscles 

 in section. 



Plate XXXII. 



Fig. 9. Cross section of the cephalothorax to show the position and importance 

 of the silk-glands (.?^) which open through the ducts in the mandibles 

 {d, fig. 2 a), en. Endosternite. 



Fig. 10. The openings of the abdominal " spinning " or cement-glands at the 

 anterior edges of the 2nd and 3rd abdominal segments ; g. The space 

 under the genital operculum ; on^ and m.^, muscles for elevating and 

 depressing the papillae. 



Fig. 11. Horizontal section ; showing the character of the anterior (Sj) and 

 posterior {s^ abdominal " spinning " or cement-glands ; e, their secre- 

 ting epithelium ; t^, portions of the ram's-horn organ ; c, coxal glands ; 

 m, muscles from the endosternite to the 1st pair of legs, showing the 

 position of the endosternite far back in the cephalothorax. 



Fig. 12. Ditto, diagrammatic ; showing the arrangement of the trachea, t^. 

 The posterior pair bent back by the enormous development of the 

 spinning-glands ; t,^, the anterior pair, only short lengths of the intra- 

 cellular tubules are shown ; t^, the ram's-horn organ opening under 

 the genital operculum {g) ; they are covered in the specimen with air- 

 chambers ; i, lateral infoldings of the body-wall. 



Fig. 12 fl. Part of the ram's-horn organ with air-chambers, showing traces of 

 protoplasm. The air-chambers are apparently intracellular. 



Fig. 18. Cross section of coxal gland, showing the nuclei and the striated 

 appearance of its walls. 



Fig. 14. Left-hand coxal gland opening on the posterior face of the coxa of the 

 3rd leg, reconstructed from sections. 



Fig. 16. Section through the eye, the large retinal cells with their distal ends 

 (rods ?) embedded among the cells forming the pigment-cup. 



Fig. 16. Sensory cell in coxa of the 3rd leg. ch. Section of thick chitinoas ring 

 round the distal end of coxa, with secreting hypodermis. The sen- 

 sory cell runs out into a fold of the arthrodial membrane between the 

 coxa and trochanter. 



