524 GEOLOGICAL SURVEY OF THE TERRITORIES. 



EXPLANATION OF PLATE V. 

 ESTHERIA COMPLEXIMANUS Pack., and details. 



Fig. 1. Male; much enlarged, ant^, Ist antennae; anP, second antennae; md, mandi- 

 "ble ; mus, adductor muscle ; hr, gill ; ir', upper, and hr", lower end of 

 flabellum. 



Fig. 2. Second antenna of male. 



Fig. 3. First antenna of male; atn, antennal nerve ; ol, olfactory process. 



Fig. 4. Five terminal joints of Ist male antenna, showing the terminal fibers of the 

 antenna] nerve imbedded in the sense-cells ; ol. pap, olfactory papilln. 



Fig. 5. First leg of male. 



Fig. 6. Second leg of male. 



Fig. 7. One of the foremost legs of the female ; br", broad, flat lower end of flabel- 

 lum, closely resembling in form the sixth endite (P). 



Fig. 7a. First endite, or gnathobase of Fig. 7, forming the maxilla-like lobe situated 

 on each side of the median ventral line of the body, just behind the month; 

 c s, setae, Xi A.. 



Fig. 76, Five setae of the gnathobase still further enlarged, to show the mnsonlar 



tissue (not nerves) enteringbaseof the jointed setae; the outer joint Mn^ed. 



Fig. 1 drawn by Mr. E. Burgess; the others by the author, with the camera land*. 



