508 ON CllUSTACEANS FROM TUE FALKLA^-D ISLANDS. [May 22. 



Plate XXXIX. 



Exosphferoma gigas, p. 553. 



n.s. Lines showing actual length and breadth of specimen figured. 



a.s.,a.i. First and second antennre. 



e.p., l.s. Epistome and upper lip. 



m., m. Mandibles. The right mandible from the outer side ; the left mandible 



from the inner side, without its palp. 

 l.i. Lower lip. 



mx. 1, m.r. 2. First and second maxillae. 

 mxp. Maxillipeds. 



prp. First peraeopod (third trunk-leg). 



Per. S.I S . Appendages of male on ventral margin of seventh pera^on-segment. 

 pip. 2 (5". Appendage of male on inner side of second pleopod. 



The mouth-organs are all drawn to the same scale, but with higher 

 magnification of the apical spines and set as of the first maxilla, and of one 

 setiforra spine of the second maxilla. A uniform but lower scale applies to 

 the two aulennpe, the perteopod, and the male appendages. 



[52] 



