XVI 



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26. Bursa of male of Nematodlrus hopTceni 284 



27. Tail of female of Filaria hippopotami, and head and tail of male 



of Cobboldia vivipara 286 



28. Fasciola nyanzce 238 



29. Transverse and median longitudinal section of Gastrothylax 



cruciformis 239 



30. Median longitudinal section of Paramphistomum giganto- 



cotyle 241 



31. Median longitudinal section of Paramphistomum buxifrons .... 243 



32. Median longitudinal section of Paramphistomum minutum .... 245 



33. Median longitudinal section of Paramphistomum sellsi ........ 247 



34. Median longitudinal section of Paramphistomum pisum 249 



35. Median longitudinal section of Paramphistomum wagandi 250 



36. Venation of Poultonia ochrascens and Neaveia 364 



37. Y'entral view of Bufo viridis,2, showing position of subcuta- 



neous fat-bodies 380 



38. Transverse section of part of the subcutaneous fat-body of Bufo 



viridis, 2 381 



39. The thoracic and hepatic vena cava inferior and liver of a Seal 



(Phoea vitulina) 886 



40. Urogenital organs of adult male Chimcera monstrosa, with pelvic 



fins and claspers (ventral view) 513 



41. Urogenital organs of adult male Chimcera monstrosa. Dissection 



from right side 515 



42. Right yesi.cula seminalis of adult male Chimcera opened from 



the ventral side 516 



43. 44. Transverse sections of Leydig's gland and duct of adult male 



Chimcera monstrosa 518 



45- 48. Transverse sections of sperm vesicle in different regions of 



adult male Chimcera monstrosa . . . , 519-521 



49. Dissection of the urogenital organs of a young male Chimcera, 



ventral view 528 



50. Urogenital organs of adult female Chimcera. Ventral view. . . . 526 



51. Dissection from right side of the posterior region of the uro- 



genital organs of a female adult Chimera 527 



52. Urogenital organs of young female Chimcera. Ventral view . . 530 



53. Urogenital organs dissected from the right side, and dissection 



of urogenital sinus of young female Chimcera 531 



54. Head of Psephotus cucullatus North 588 



55. Outline of palatal aspect of premaxillaries of four specimens of 



the Sea-Elephant from South Georgia 584 



56. Outline of nasals of four specimens of the Sea-Elephant from 



South Georgia 587 



