New Zealand Nematodes. 367 



65 to 7" mm., 



6'5 to 7' mm. 

 I'D 



•0 5-5 20- '45-' 95- 

 •5 1-6 25 28 -J 



•0 5-3 21-8 -M- 27 99-2 



lo 19 21 2-3 1-5 



Dorylaimus Novae Zealandiae 



6*7 mm., 



6'36 mm. 



•4 1-4 21 23 



Dorylaimus profundus 



•0 5-9 22- '50-' 34 98-2 „ 



•5 1-8 23 2* F 7 ' mm - 



64 236 -M- 24 99- 

 •5 21 27 3* 11 



6' to 6"3 mm. 



The sketch from which the formula is to be derived may be as 

 complete as one wishes, but all that is necessary is a very rudi- 

 mentary skeleton of the form of the worm. Draw a line with the 

 aid of the camera lucida representing the axis of the worm. 

 Across this line at the proper places draw cross lines representing 

 the diameters. The result will resemble Fig. 4 from which the 

 formula can be easily computed. The measurements of the 

 skeleton shown in Fig. 4 give the formula 



2- 9-3 17-4 45-5 93- ^ 



2-8 4-2 5-9 8-6 3-6 ' 78 mm - 



Fig. 4. Skeleton camera lucida drawing from which to compute the nematode 



formula. 



