Plate 17. Third-Stagb Lobster. 



Figure 25. Bight mandible from inside, M^about 60. The palpus or en- 

 dopodite is now two-jointed. The inside edge of the cutting teeth shown; also 

 the strong mandibular muscle. 



Figure 26. Bight first maxilla from above, M=75. In the basipodite and 

 coxopodite is shown the retraction of the body of the maxilla due to moulting. 

 The endopodite has now one joint. 



