PLATE X. 



Fig. 51. Transverse section through Actinotrocha Species A. 

 225. 

 Continuation of series 51. 

 Continuation of series 51. 

 Continuation of series 51. 

 ( lontinuation of series 51. 

 Continuation of series 51. 

 Continuation of series 51. 

 --( lontinuation of scries 51. 

 ectodermal wall. Ob 



Taken through ganglion. \ Ob. X4 0c. Camera. 



Fig. 51a. 

 Fig. 516. 

 Fig. 51c. 

 Fig. 51A 

 Fig. 51e. 

 Fig. 51/ 

 Fig. ri,;. 



Fig. -"-I/,. 

 Fio. 52.- 

 Fig. 52a. 

 Fig. 526. 

 Fig. 52c. 

 Fig. 52d. 

 Fig. 52e. 

 Fig. 52/ 

 Fig. .vj;;. 



Showing the lining drawn away from the 



Taken through tin liar segment. 



X4 Oe. Camera. 225. 



Continuation, of series 51. Taken through collar region just anterior to bases of the ventral tentacles. 

 ,' lili 1 Oc. Camera. < 225. 



Transvefee section through the nephridial canal. Actinotrocha Species 1*>. ^ Oil Immersion. 12 Zeiss 



Comp. Occulare. Camera. X 1400. 

 -Continuation of series 52. Taken through the lower branch of the nephridial canal. ,'_. < il Immersion. 

 12 Zeiss Comp. Occulare. Camera, x 1400. 

 Continuation of series 52. Taken through the end of the upper branch of the nephridial canal. r V Oil 



Immersion. 12 Zeiss Comp. Occulare. Camera. > 1000. 

 Longitudinal section through one of the cellular processes at the end of the nephridium. Showing two 

 nuclei. r V Oil Immersion. 12 Zeiss Comp. Occulare. Camera, x 1000. 



Same as fig. 52c. Showing one nucleus. T V Oil Immersion. 



xiooo. 



Transverse section through the end of a process, /.nil Immersion. 



1000. 



Transverse section through the proximal half of the processes. 



Occulare. Camera. X 1000. 



tudinal section through anterior end of a nephridium. Actinotrocha Species B. t \ Oil Immersion 



12 Zeiss Comp. Occulare. Camera. X1000. 

 134 



12 Zeiss Comp. Occulare. Camera. 

 12 Zeis> Comp. Occulare. Camera. 

 ,'. nil Immersion. 12 Zei>s Comp. 



