27. 



Thus the ascending tu >?s of the hi udder i are 

 joined on ea<ih aids by ft. ur ccl'locting tubulea. Cne r '^eivee 

 three *<> t a of three L'Aaie cells each; twt receive two sets 

 each, and one nnly one 9t* On each side of the body are 

 twenty ~four flame oelle. The formula for this system then 

 is "2x8x3**, totalling forty *eight flame eells, according to 

 the plan used toy loose (1894, p. 68) and lately adopted by 

 Cort (1919, p. 2). Thero ar no flarn oelle fcund in the 

 tail. th anterior half of the body oontains only *ix flame 

 oells on e.-um side while t>:* pouter lor half hae eighteen* 

 In terma of the o^roaria this arrangement i hard to explain 

 but in the light of the adult eohines tome the number at 

 either end i quite readily understcod. In the adult (fig. 4* 

 th< region of the body bacik of Uto central Bucker is 

 several times lon#<?r than that anterior to it. Sinoe I 

 believe the plan of the excretory system of the oeroaria 

 is essentially the ^ime as t>mt of the adult, it is 

 plain that a atretohing of this system to meet the adults 

 growth at the posterior end would result in a uniform dis- 

 tribution of the flstme oella thruout the entire bcdy when 

 the wona is full grown. 



AQ stated previously a significant progressive modificatj 

 of the attachment of the cipillaaries is noticeable throughout 

 the cercnria. At the posterior end cf the body the groups of 

 three onipillari join at a common point on the accessory 

 collecting tubule and form very definite capillary groups* 



The farther anterior lie capillaries join the ntor widely 



tubule 

 separated are the groups on the accessory collecting/or 



collecting tubule* At the anterior end, unless the plan of 



