64 T. V. HODGSON. 



provided with a number of stiff setae. The eye-stalks are rather stout and in front of 

 them ; on the margin of the cephalosome is a stout slightly curved spur. 



The surface of the cephalosome is sparingly covered with rather long setse. 



Of the mesosome the first segment is stout, the two following are subequal, but 

 the third is the broadest, the fourth is a very little shorter aucl narrower than the 

 preceding. All these have rounded epimera ; they are rather widely separated and in 

 the first segment they are directed forwards so as to partially embrace the cephalosome. 

 All are provided with long spinous setae, and the segments themselves are furnished 

 with a transverse band of more delicate setse. 



The three posterior segments are curved posteriorly, their curvature increasing as 

 their diameter decreases. The first of these segments carries a transverse row of setse, 

 the other two bear two or three stouter ones more laterally. 



The metasome consists only of a single pentagonal plate, the angles of which are, 

 however, rounded, and each of the three free ones bears a group of stout spinous seta 

 similar to those on the epimera of the rest of the body. There are a few setse on 

 the surface of this plate, centrally and anteriorly. 



The uropoda are very large and biramous. The protopodite is a single joint with 

 a comparatively slender base and widening distally, the exo- and endopodite differ but- 

 little in size, the former is straight and provided on both sides with long stiff setse ; 

 the latter is curved and only carries the setse on the outer side of the curve and 

 distally. 



The first antenna is short, it comprises a peduncle of two joints subequal in length, 

 but the proximal one is much shorter than the other, and fringed distally with stout 

 spinous setse. The flagellum is about half as long again as the peduncle and consists 

 of only four joints, the first two are short, the others are more than twice as long, the 

 last being very slender and provided with two specialised setse. 



The second antenna has a peduncle of five joints ; of these the first three are very 

 short and stout, the basal one having a long spine on its inner border and the third 

 forms a characteristic bend in the appendage. The two terminal ones are long and 

 slender, the advantage being with the more distal one ; the flagellum is about as long 

 as these two joints. 



The mouth parts are normal. 



The mandible is strong and the masticatory lobe terminates in four bilobed teeth, 

 or, rather, two pairs, since one pair is larger than the other, the individuals of each 

 pair being approximately subequal ; below these are three slender teeth, having their 

 upper margins produced into a serrated blade. The molar process is long and widens 

 out > distally into a plate-like structure, having anteriorly one prominent tooth and 

 posteriorly several small tubercles. The palp is three-jointed, the first two joints are 

 rather long, fringed on one side with very minute setse ; the third is a serrated spine 

 less than half the length of the joint bearincr it. 



The first maxilla comprises a short and slender inner lobe armed distally with 



