64 T. V. HODCSON. 



juoviiU'il wiili a mniiltcr of stiir sctic. Tin- eyc-slalk.s are rather stunt ami in front of 

 them ; ou the margin of the cephahtsomc is a stont slightly curved spur. 



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

 Of the mesosome the tirst segment is stout, the two following are sul)e(iual, hut 

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

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

 the Krst segment they are directed forwards so as to partially endjrace the cephalosome. 

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

 with a transverse baud of more delicate seta). 



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

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

 the otlier two bear two or tiiree stouter ones more laterally. 



The meta.some 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 setit' on 

 the .surface of this plate, centrally and anteriorly. 



The uropoda are very large and 1)iramous. The protopodite is a single joint with 

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

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

 the latter is curved and only carries the seta) 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 nmch shorter than the otlier, and fringed distally with stout 

 spinous setse. The fiagellum 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 seta-. 



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 : tlie fiagellum is about as long 

 as these two joints. 



The mouth parts are normal. 



The mandible is strong and the masticatory lobe terminates in four biloljed 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 

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

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

 less than half the length of the joint bearing it. 



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



