43 



pi. 2 = second pleopod. 



pi. 3 = third pleopod. 



.3. = sac-like dilation of mid- 

 gut. 



set.cut. = setigerous plates of 

 cuticle of stomach. 



set. cut'. = setigerous plates of 

 cuticle at origin of liepato- 

 pancreatic tubes. 



St. = stomach. 



st.s. = sternal sinus. 



f. = terguni. 



tel. = telson. 



tr.hr.v. = transverse branchial 

 vessel. 



uro. 1 = first uropod. 



uro. 2 = second uropod. 



uro. 3 = third uropod. 



V. = valve separating heart 

 from posterior aorta. 



Plate I. 



Fig. 1. First autenna, witli four- jointed secondary 

 flagellum (fl. sec.) or exopodite. 



Fig. 2. Second autenna, with enlarged basal joint 

 bearing the antenuary cone (ant. c.) and stout 

 flagellum bearing plumose setae and calceoli 

 (calc). 



Fig. 3. Ninth and tenth joints of second antenna (en- 

 larged) showing calceoli. 



Fig. 4. Left mandible, showing three-jointed mandi- 

 bular palp (uin. p.), and saw-like jaws bearing 

 double rows of teeth. 



Fig. 5. Left first maxilla, also enlarged single spine. 



