Fig. CXL. — Conchoecia symmetrica G. W. Mui.ler, ?. — Mandible. 15. Pars iticisiva of Ihc right coxalcseon from inside; 

 382 X. 16. — 18. Parts of Uiis Cndite, all seen from inside; 638 X. 16. Tlie toothed edge. 17. The distal tooth-list. 

 18. The proximal tooth-list. 19. Endite of the left basale seen from outside; 292 X. 20. A tooth of this endile; 

 638 X. 21. The proximo-medial ridge of the basale -(- the epipodial appendage; 472 X. 22. Right mandible (except 

 the coxale), »<'fu from inside; 82 X. (From specimens from station 64 b.) 



