Ifi T. Y. 11 1 x; SON. 



The visil)le seginciits of the mesosome are smooth ; the first is small, somewhat 

 ercscentio in shape ami does not reach the margin of the body ; the second and third 

 arc narrow and their epimcra are cleft ; the fourth segment is much longer than either 

 of the two preceding. The fifth is very nearly as long as the first three together and 

 shows indications of the median longitudinal division characteristic of many members 

 of this family. The sixth segment is narrower but almost as long as the fourth, the 

 posterolateral angles project backwards as a large rounded process, the inner l)order 

 of which forms a small tubercle. It is on this process that the last pair of pereiopoda 

 are articulated. The last segment of the mesosome is very small ami wc<ltrcd in 

 between these processes. 



The metasome comprises six distinct segments, of which the first is the shortest ; 

 the sixth terminates in a telson which is triangular in shape and acutely pointed, 

 fringed with short .setae and with a stout one distally. The epimcra are scythe-like 

 in form and distinct from the segment bearinji; them. 



The uropoda are about the same length as the telson. 



The protopodite is short and broad and situated at a considerable angle with the 

 last abdominal segment, and prolonged internally as a stout process with setae at the 

 extremity. 



The exopodite is a little the narrower of the two and actually longer than the 

 endopodite. This latter is a little broader and has its inner margin more rounded. 

 Both are fringed with short .setaj and less abundantly with long plumose setae, 

 e.'^pecially on the inner margin. 



The first antenna comprises a peduncle of three joints, the proportions being 

 2. 2. 5, the last being very much the most slender ; this is followed b}^ a flagellum 

 of some half-dozen joints, of which the first is minute. 



The second antenna has a peduncle of four joints, the proportions being 2. 2. 

 4. 5 '5. The flagellum has about eight joints. In both cases the joints of the 

 peduncles bear a few setae distally and also along the last joint ; shorter setae fringe 

 all the joints of the flagellum. 



In Mr. Beddard's description the two pairs (if antenna) are described as having an 

 extra joint in the peduncle. 



The mandibles are strong and scythe-like. Each is slightly curved, pointed 

 distally, and has a prominent .spine on the outer margin. The inner l)order liears two 

 small rounded flanges to fit similar ones from the opposite side. 



The maxilliped (fig. 3a) comprises a very thick basal joint, straight on its 

 inner margin, with a series of fine setae distally, stronger ones proximally, rounded 

 externally and fringed with longer and finer sct:«. From its inner angle of this joint 

 there projects a thin, rather triangular joint and externally a four-jointed palp. The 

 joints of the palp are broad and flat ; the terminal one, however, is more slender ; 

 their proportions are I. 4. 3. 2. The external margin of all these joints is fringed 

 with plumose .setae, and there are three distally on the terminal joint. 



