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PROCEEDINGS OF THE NATIONAL MUSEUM 



mandible; this can be appreciated by comparing the figures of the 

 mandible and of the antennal scale, which are drawn to the same scale. 

 The basal portion of the mandible is so large that it occupies a con- 

 siderable portion of the branchial cavity ; it is plainly visible as a large 

 subspherical structure lying beneath the anterolateral portion of the 

 carapace. 



Figure 5. — Processa molaris, new species: a, Frontal part of holotype in dorsal view, X 11; 

 b, rostrum of holotype in lateral view, X 24.5; c, fifth and sixth abdominal somites of 

 paratype in lateral view, X 17.9; d, telson and uropods of paratype in dorsal view, X 17.1 

 e, tip of telson of paratype, X 73;/, right antennule of holotype in dorsal view, X 18.3 

 g, left antennal scale of holotype in dorsal view, X 25. 2; h, left mandible of holotype, X 25.2 

 /, left first maxilla of paratype, X 25.2; /, left second maxilla of paratype, X 25.2; k, left 

 first maxilliped of holotype, X 25.2; /, left second maxilliped of holotype, X 25.2; ni, left 

 third maxilliped of holotype, X 11; n, right first leg of holotype, X 11; o, left first leg 

 of holotype, X 11; ^, right second leg of holotype, X 11; ?, left second leg of holotype, 

 X 11; r, left third leg of holotype, X U; s, left fourth leg of holotype, X 11; t, left fifth leg 

 of holotype, X 1 1 . 



