CRUSTACEA FROM THE ' CHALLENGER ' EXPEDITION. 57 



Fig. 12. Fifth i , , , , 

 Fig. 13. Sixth I P le °Podofafemale. 



Plate VII. 



All the figures refer to Petalophthalmus armiger. All drawn with very low power, 



except figs. 7-9. 



Fig. 1. A female, X 2 nat. size, a 1 , first antenna; up, appendix lamellaris; a 1 , second antenna- 

 pm, palpus mandibular; mp, maxilliped; gn, gnathopoda; prp, pereiopoda; la, breeding- 

 lamellar. 



Fig. 1 a. Caudal fin of the same. 



Fig. 2. A male, x 2 nat. size, a 1 , first antenna; ap, appendix lamellaris ; a 2 , second antenna; pm, 

 enlarged palpus mandibular; mp, maxilliped; gn 1 , first gnathopod; prp 2 , second pereiopod; 

 prp', fifth pereiopod. 



Fig. 2 a. Caudal fin of the same. 



Fig. 3. First antenna of the female. 



Fig. 4. Second antenna of the same. 



Fig. 5. Scale of the second antenna. 



Fig. 6. Upper lip. 



Fig. 7. Mandibula of the female : pm, palpus mandibular. 



Fig. 8. First maxilla of the same. 



Fig. 9. Second maxilla of the same : p, palpus ; fl, flagellum. 



Fig. 10. Maxilliped of the same : al, appendix lamellaris ; p, palpus ; fl, flagellum. 



Fig. 11. First gnathopod of the same. 



Fig. 12. Second gnathopod of the same. 



Fig. 13. Third pereiopod of the same. 



Fig. 14. Pleopoda 1-5 of the same. 



Fig. 15. Maxilliped of the male : la, lamellar appendage. 



Fig. 16. First gnathopod of the same : la, lamellar appendage. 



Fig. 17. First, fourth, and fifth pleopoda of the same. 



Plate VIII. 



All the figures refer to Chalaraspis unguiculcrfa. 



Fig. 1. A male, x 2 nat. size, a 1 , first antenna; a 2 , second antenna; gn, gnathopoda; p, pereiopoda. 

 Fig. la. Head of the male, seen from above: sc, small tubercle beneath the rostrum and between the 



eyes. 

 Fig. 1 b. Caudal fin of the same. 

 Fig. 2. First antenna of a female. 



Fig. 3. Second antenna, with lamellar appendage of the same. 

 Fig. 4. Mandibula of the same. 

 Fig. 5. Under lip of the same. 

 Fig. 6. First maxilla of the same. 



Fig. 7. Second maxilla of the same : p, palpus ; fl, flagellum. 

 Fig. 8. Maxilliped of the same : p, palpus ; fl, flagellum. 

 Fig. 9. First gnathopod ) fthesame 

 Fig. 10. First pereiopod ) 

 Fig. 11. Upper lip of the same. 



SECOND SERIES. — ZOOLOGY, VOL. I. I 



