ART. 20. HOOKWORMS OF THE GENUS UNCINARIA EANSOM. 5 



wh}' it should not be accepted as belonging to Goeze's species until it 

 can be shown to be different. 



REFERENCES. 

 Cameron, T. W. M. 



1924. — Dochmoides: a new genus for the hookworm "Uncinai'ia" stenoce- 



phala Railliet. Journ. Helminth., London, vol. 2, pp. 4&-50, figs. 



1-5. 



FtJLLEBOBN, FrIEDRICH. 



1924. — Beraei'kungen iiber die Identifikation von " Hakenwiirmern." Arch. f. 

 Schiffs-u. Tropen-Hyg., Leipzig, vol. 28, pp. 12-15, pi. 1, figs. 1-6. 

 Looss, A. 



1911or. — The anatomy and life history of Agchylostoma duodenale Dub. 

 A monograph. Part. 2. The development in the free state. Rec. 

 School Med., Ministry Education, Egypt, Cairo, vol. 4, pp. 159- 

 613, pis. 11-19, figs. 101-208, photograms 7-41. 

 Railliet, Alcide. 



1893a — Traite de zoologie medicale et agricole. 2 ed. [faso. 1]. 736 pp., 

 494 figs. 8°. Paris. 

 Ransom, B. H. 



1921. — [Unusual parasites of the domestic hog] [Read before Helmintho- 

 logical Society of Washington, Nov. 20, 1920]. Journ. Parasi- 

 tology, Urbana, 111., vol. 7 (4), June, p. 190. 

 1922. — [Notes on hookworms] [Read before Helminthological Society of 

 Washington, May 14, 1921]. Journ. Parasitology, Urbana, 111., 

 vol. 8 (2), Dec, 1921, p. 96. 



EXPLANATION OF PLATE. 



All figures drawn witli camera lucida at same magnification as indicated by 

 scale on plate. 



ABBREVIATIONS. 



e. I., externo-lateral ray. 

 I. p., lateral cephalic papilla. 

 m. I., medio-lateral ray. 

 p. I., postero-lateral ray. 



T., boundary line between thicker ventral portion and thinner dorsal portion 

 of lateral wall of oral capsule. 



Figs. 1-4. — Uncinaria polaris {=stenocephaIa) . 



FiG. 1.— Head from left side. U.S.N.M. Helm. Coll. 3250. 



2.— Male bursa from left side. U.S.N.M. Helm. Coll. 3250. 

 3.— Dorsal ray of male bursa. U.S.N.M. Helm. Coll. 3250. 

 4.— Tail of female from left side. U.S.N.M. Helm. Coll. 3250. 



Figs. 5-8. — Uncinaria stenocephala. 



Fig. 5.— Head from left side. U.S.N.M. Helm. Coll. 19,326. 



6.— Male bursa from left side. U.S.N.M. Helm. Coll. 19,326. 

 7. — Dorsal ray of male bursa. U.S.N.M. Helm. Coll. 19,330. 

 8.— Tail of female from left side. U.S.N.M. Helm. Coll. 19,380. 



Figs. &-12. — Uncinaria criniformis. 



Fig. 9.— Head from left side. U.S.N.M. Helm. Coll. 3392. 



10.— Male bursa from left side. U. S.M.N. Helm. Coll. 24,788. 

 11.— Dorsal ray of male bursa. U.S.N.M. Helm. Coll. 19,332. 

 12.— Tail of female from left side. U.S.N.M. Helm. Coll. 3392. 



