NO. 2131. NEMATODE PARASITES OF RODENTS— HALL. 



29 



band are larger than the others. Body transversely striate at inter- 

 vals of 9 to 34 [X. Esophageal tube from month to esophageal cell 

 Piriform glands 



chain 70 \). long, 

 almost spherical, 

 diameter. 



Male 50 to 80 



57 to 72 |x in 



mm. long with a 

 maximum diameter of about 500 \t.. 

 Ratio of length of anterior esopha- 

 geal portion of body to length of 

 posterior portion of body is 2 or 3 : 1 

 (fig. 32). Testis begins about 3 mm. 



*^•^ 



*sA 



Fig. 33.— Tricuuris ovis. Posterior end 



rIG. 32.— TRICHUEIS OVIS. MALE AT EIGHT, FEMALE AT qF MALE, SHOWING SHEATH {sh.) AND SPIC- 

 LEFT. *VULVA, X5. FROM RANSOM, 1911, AFTER CUE- ULE(sp.). ENLARGED. FEOM RANSOM, 

 TICE, 1890. 1911, AFTER CUETICE, 1890. 



from the posterior end of the body, extends forward to near the 

 vulva region and turns back as the ductus seminalis, transforms to 



