AET. 12 A NEW LIVER FLUKE FROM A MONKEY SANDGROUND H 



bursal ray formula is practically identical with, and the dental arma- 

 ture of the esophagus resembles these structures in Ternidens, a typical 

 genus of the Oesophagostominae. In view of these considerations, 

 the writer has refrained from indicating the subfamily relation of 

 Colohostrongylus. It seems, however, that the Oesophagostominae, 

 as at present defined, constitute an artifical group, necessitating the 

 allocation to other subfamilies of several genera (as Oesophagosto- 

 moides Schwartz, 1928) whose characteristics show a close aflBnity 

 with the type genus OesopJiagostomum. 



REFERENCES TO LITERATURE 

 Leiper, R. T. 



1910. The entozoa of the Hippopotamus. Proc. Zool. Soc. London. Pp. 



233-251. 

 Loess, A. 



1907. Notizen zur Helminthologie Aegyptiens. VII. Ueber einige neue 



Trematoden der agyptischen Fauna. Centralbl. f. ^ teriol., etc. 



Orig., Jena, Abt. 1, vol. 43 (pt. 5), pp. 478-490. 

 Odhner, T. 



1911. Results of the Swedish Zoological Expedition to Egypt and the White 



Nile, 1901, under the direction of L. A. Jagerskiold. Upsala. No. 

 23a. Part 4. Facioliden. Pp. 1-166. 

 Schwartz, B. 



1928. Two new Nematodes of the Family Strongylidae, parasitic in the 

 intestine of Mammals. Proc. U. S. Nat. Mus. vol. 73, art. 2, 

 pp. 1-5. Washington. 

 Stiles, C. W., and Goldberger, J. 



1910. A study of the Anatomy of Watsonius (n. g.) watsoni of Man. 

 Hygienic Lab. Washington. Bull. No. 60, pp. 1-264. 



EXPLANATION OF PLATES 



Abbreviations: a. acetabulum; an. anus; c. cirrus organ; d. dorsal ray; exd. 

 externo-dorsal ray; exl. externo-lateral; exv. excretory vessels; g. p. genital pore; 

 gub. gubernaculum; i. intestinal caeca; I. v. latero-ventral; met. metraterm; m. I. 

 medio-lateral; o. ovary; oe. esophagus; os. oral sucker; ph. pharynx; p. I. postero- 

 lateral; pp. prebursal papilla; s. r. seminal receptacle; tl and t2 anterior and 

 posterior testes; u. uterus; v. vitellaria; vu. vulva; v. v. ventro-ventral. 



Plate 1 

 Colohostrongylus strongi 



Fig. 1. Anterior extremity showing buccal teeth and kink in esophagus. 



2. Posterior extremity of female showing vulva, vagina, etc. 



3. Bursa of male flattened out to show distribution of rays. 



4. Posterior extremity of male. 



Plate 2 



Fig. 1. Oswaldocruzia agamae, caudal extremity of male with bursa spread. 



2. Oswaldocruzia agamae, anterior extremity of female. 



3. Leiperiatus hopkeni, anterior extremity from the dorsal aspect. 



4. Leiperiatus hopkeni, caudal extremity of female viewed from the side. 

 6. Leiperiatus hopkeni, caudal extremity of male with bursa spread. 



5. Dicrocoelium colobosicola, ventral view showing topography of organs. 



o 



