448 PROF. C. CHILTON ON DETO, A SUBANTAECTIC 



recurved seta9 replacing the molar tubercle ; this contains a large number o£ 

 long, stiff, curving bristles of varying length. In the right mandible 

 "(fio-. 29) the general structure is the same, but the accessory lobe bears a 

 number of small sharp teeth instead of ending in two large teeth as in 

 the left mandible. 



The lower lip (fig. 31) is formed of two rounded lobes, the cleft between 

 them reaching to the base, but they are united in the proximal half by an 

 inner folded central lobe, the inner margins and the distal half of the outer 

 margin of the outer lobes being densely fringed with long fine setse. 



The first maxilla (fig. 32) has the usual form, the extremity of the outer 

 lobe bears about ten stoutly chitinised spines of different sizes, its inner 

 maro-in is fringed near the middle with a number of very fine delicate setse ; 

 the inner lobe is moderately stout and bears at the end the usual two brush- 

 like setfe. 



The second maxilla (fig. 33) is slightly curved, its outer lobe is much 

 smaller than the inner, both being supplied with the usual setie ; the distal 

 portion of the outer margin is fringed with slender setDe, but there are a few 

 on the inner margin near the base. 



The maxillipeds (figs. 34 & 35) have the epipod long, about as long as the 

 broad second joint, tapering towards the subacute extremity, its margin 

 fringed with delicate setre ; the enlarged second joint is expanded into a 

 rounded lobe at the outer distal angle, fringed with long fine seta3; the palp 

 has a short joint at the base, and the terminal portion, though formed of a 

 sino-le piece, is lobed on the inner side, indicating that it is formed of four 

 joints, each lobe bears a large number of short stout setae ; the inner, 

 masticatory, lobe of the maxilliped is rectnngular, truncate at the extremity, 

 densely covered with fine setre, at the inner distal angle it bears a minute 

 appendage covered with very short setse. 



The leo-s (figs. 3G & 37) are all of about equal length, the posterior ones 

 being only slightly longer than the anterior; in all of them the ischium is 

 long, being about two-thirds the length of the basis, and it expands slightly 

 distally, the merus is about subequal with the carpus, and the propod is 

 slightly longer than either of the two preceding joints, but considerably 

 narrower ; the dactjl is short and stout and has the basal portion thickly 

 covered with fine short hairs ; there appears to be no special dactylar seta. 

 On all of the joints, as shown in the figures, there are a few rather short, 

 stout spines, and the inner margins of most of the joints, particularly the 

 ischium, merus, carpus, and propod, are thickly covered with fine, very short, 

 setge. None of the legs is specially modified in the males. 



The first pleopod of the male (figs. 38 & 39) has the basal joint produced 

 laterally into a broad lamellar expansion with its angles rounded; the exopod 

 is operculiform, broadest near the base and tapering to a subacute apex ; the 

 endopod is specially modified, it is somewhat broader at the base and then 



