(Inr dg/d 



,. & -.■■■■ K3 ^3i. 







Fig. 71 



/ 



Fic. 68 



O u 



t 



Fig. 65, Diagrams of esojihaei. A-D — Cross spttions showing vari- 

 ous types of muscle arranKf-niftit, (.\— Radii of esophageal luitien ter- 

 minated by tubes, musculature cfincentered : ex. RhnbdUis. Lfidjinemay 

 Heterakis and first stage strnngyles, PJfctus and Axonolnimus : B — 

 Sides of radii converging distally, mus<nilature concentered, attachment 

 points present; ex, Oesophagostomum. CamaUanun, CuculUinun, Sphnero- 

 laiwiis and Metachromitdora .- C — Sides of radii converging distally, 

 musculature concentered, no attachment points, ex. Ethntolniinus, Mo- 

 nopoHtkia, Sphilophorella. Acanthnnchus ; D — Sides of radii parallel, 

 musculature dispersed, ex. Asroris, Phi/snJnptera, TlwriMtuK. Tripylti) . 

 E — Diagram of rhal)ditid psr»ithagii.«i showing parts of esophagus and 

 relative position of radial tubes of lumen, dne — -dorsal escphagi-a! 

 nerve, sv ne sub ventral esophageal nerve, sd et subdorsal and v et 

 ventral esophageal tnlifs, mf marginal fibers. Ir radius of lumen, ap 

 attachment point, pr ro procorpus, me ro metacorpus, i isthmus. >» Imlh. 

 Original. 



Fic. *>(>. Diagram showing nuclei of metacorpus in RhabditiM. 



Fio. 67. Diagram showing groups of nuclei in esoi)hagus of Rbnb- 

 diti/t terricola as occurring in cross se4tion. a-b~ -Procorpus; c-d — 

 metacoriius ; e-f — bulb. 



Fig. 68. Jfhabditis terricoln, esophageal cross sections, a — procorpus; 

 b — metacorpus ; c-f- — Fhabditift lamhdiensis bulb. 



Fic. 69. Ditf/IfiichuN dipsari. Sections through corpus. 



Fii!. 7<K Ditf/lenrhus dipnaci (Sections through bulbar region). 



Fk;. 71 . Ditylenrhtis dip/tari ( Reconstructon of esophagus with nu- 

 I'lei in position. 



Fins. 72-7,'*. .1 plielctu'hux a re nap. 72 — pr(M'ori>us ; 7^-— metacor- 

 pus; 74 — bulbar region ; 7.'» - -region of glandular appendage. 



FlOS. 66-75— After Cbitw. & Chitw. 1936. .7. \Vash. Arad. Sc. v. 

 26 (2) ; Fig. 65 original. 



77 



