— 156 — 



Fig. 31. Cephalic extremity. View from the side. 

 Fig. 32. Sucker on the tail of the male. Detail. 

 Fig. 33. Bursa of male. Lateral view. 



Fig. 34. Part of pharynx with muscular papillae, and the beginning of 

 the oesophagus with chitinous plates. 



TABLE VI. 



Fig. 35. Strongyluris elegans G e n d r e 1909. Cephalic extremity of 

 the parasite with pharynx, oesophagus, bulb, and beginning of the intestine. 



Fig. 36. Caudal bursa of male with papillae, sucker and characteristic 

 spicula. 



Fig. 37. Oxyuris leidyi n. sp. General view of female. 



Fig. 38. Anterior end of the head of female of this species with 3 lips 

 and rudimentary intermediate lips. 



Fig. 39. Scheme of distribution of lips in the same species. 



Fig. 40. Oxyuris myriapodicola n. sp. General view of female. 



Fig. 41. Cephalic extremity of the parasite with the oral capsule. 



Fig. 42. Oxyuris praeputialis n. sp. General view of female. 



Fig. 43. Cephalic extremity of the parasite covered by the cuticular 

 fold. 



Fig. 44. Uncovered cephalic extremity of the parasite. 



T A B LIE VII. 



Fig. 45. Oxyuris megatocerca n. sp. 

 Fig. 46, Caudal extremity of male. 



Fig. 47. Oxyuris annulafa Linst. 1899, General view of female. 

 Fig. 48. Cephalic extremity of female with 6 papilliform lips. 

 Fig. 49. An egg of this species. 

 Fig. 50. Idem. 



Fig. 51. Arrangement of the interior lips in this species. 

 Fig. 52. Oxysoma dogleli n. sp. Cephalic extremity of the male, e — 

 excretory aperture. 



Fig. 53. Caudal extremity of the male of the same species. 

 Fig. 54. Idem. Side view. 



Fig. 55. Caudal extremity of female of the same species. 

 Fig. 56. Excretory pore of the same species. 



TABLE VIII. 



Fig. 57. Isacis multipapillata n. sp. General view of male. 



Fig. 58. General view of female of the same parasite. 



Fig. 59. Lips of the same parasite; view from the anterior surface. 



Fig. 60, Anterior portion of body in the male. 



Fig. 61. Caudal extremity of the male. 



Fig. 62. Idem. Side view. 



Fig. 68. Physaloptera abbreviata Rud. Anterior portion of body. 



i 



