302 ME. GEORGE M. THOMSON ON A FRESHWATER 



EXPLANATION OF THE PLATES. 

 Plate XXIV. 



Figs. 1-16. AnaspUles tasmanice. 



1. Body of animal, ? . x 4. 



2. Dorsal view of ceplialoii : (e) 1st antennae; (6) 2nd antennae, x 30. 



3. Basal portion of 1st antenna. x 26. 



4. Portion of tLe external tlagellum of same, showing setse and sensory haiis. x 56. 



5. Basal portion of 2nd antenna, x 26. 



6. First maxilla, x 26. 



7. Second maxilla, x 26. 



8. One of the comb-like setse from the outer lobe of the second maxilla. X 56. 



9. Under-lip. X 26. 



10. Mandible, with palp, x 26. 



11. Cutting-edge of same, showing the double row of teeth. x 84. 



12. Grinding tubercle of same. x 84. 



13. Leg of the 1st pair (maxilliped). X 13. 



14. Section of basis of same, x 26. 



15. Extremity of propodos, and dactylos of same, underside, x 56. 



16. Leg of the 2nd pair. X 13. 



Plate XXV. 



Figs. 1-10. Anaspides tasmania. 



1. Leg of the 6th pair. x 13. 



2. Leg of the 7th pair, female, x 13. 



3. Leg of the 8th pair, female : ^.o. = tubercle with genital opening. x 13. 



4. Second pleopod, female, x 13. 



5. First pleopod, male, x 13. 



6. Eadopodite of same, x 26. 



6 a. Endopodite of same, seen from the inside, young male, x 56. 



7. Second pair of pleopoda in male, without the exopodites. x 13. 



8. Endopodite of 2nd pleopod in male. x 26. 

 8«. Extremity of same turned inward. x 26. 



9. Telson and uropods from above. x 13. 



10. Oral aperture seen from the underside. X 10. 

 i.a., 1st antennae; o.a., 2nd antennae; m./., under lip ormetastoma; ware., mandibles ; mp., maxillipeds. 



Plate XXVI. 



Figs. 1-12. Anaspides iasmania. — Anatomy. 



1. Longitudinal (diagrammatic) section through the body of a female specimen (the heart is 

 represented as too near the dorsal surface, the large dorsal muscles not being shown) : o.a., 

 mouth-orifice; in., intestine; h.t., liver; n.c, nerve-cord; c, heart; ov., ovaries; co., anterior 

 intestinal ctecum ; co.j, posterior intestinal caecum ; an., anus. 



