174 TAPEWORMS OF HARES AND RABBITS— STILES. vol.xix. 



rostellum not A'isible. Keck absent, segmentation beginning immedi- 

 ately back of the head, the proglottids rapidly becoming distinct; 

 segments vary in length from 50 /< to 0.75 mm., and are always much 

 broader than long, measuring in some cases 13 mm. broad; the poste- 

 rior ilap projects but a short distance over the anterior border of the 

 next following segment. Genital pores double and opposite in poste- 

 rior half of lateral margin. Genital cloaca quite deep. Anlagen of 

 genital canals and female glands visible in the tirst segments, testicles 

 appear a little later. Male organs: Testicles appear about the thir- 

 tieth segment, between 100 and 150 in number to a proglottid, scat- 

 tered through the median field between the ovaries; cirrus-pouch, 0.5 

 mm. long by 0.17 mm. broad, very muscular, with vesicula seminalis in 

 proximal portion and coiled smooth penis in distal jwrtion. Female 

 organs: Female glands nearly 1 mm. from the lateral border of the 

 segment, some distance from the longitudinal canals; ovarian tubules 

 appear about the thirty-tiftli segment, reach their highest development 

 from the forty-seventh to fifty-seventh segments and then rapidly atro- 

 phy, disappearing almost entirely by the sixtieth segment; vagina 

 ventral of the cirrus-pouch on both sides of the segment; uterus single, 

 transverse, proximal to testicles, and possesses proximal and distal 

 blind pouches, similar to those of Cittotamia liectinaia. Ova, 48 to (JO // ; 

 bulb of pjaiforni body, 23 /<. Excretory system: Dorsal canal between 

 ventral canal and nerve. Longitudinal nerves rather close to lateral 

 margin, near distal end of cirrus-iwuch. Genital canals cross the 

 longitudinal canals and nerve dorsally. 



Host. — Marmot {Arctomys marmoia) by Frolich and Blanchard. 



Types. — Original type (?). Typical specimens with R. Blanchard 

 (Paris), collection Bureau of Animal Industry (No. 1370, B.A.I.), and 

 collection of Stiles (U.S.N.M.). 



Geographical distribution. — (?) Frolich; France (Brian9on), by Blan- 

 chard. 



CITTOTiENIA DENTICULATA (Rudolphi, 1804), Stiles & Hassall, 1896. 



(Plate XII, ligs. 3-8; Plate XIII, figs. 1-3.) 



1804, Tania denticnlata, Rudoi.phi, Bemerkungeu a. d. (Jebiete d. Natnrg., etc., p. 81. 

 1S28, Alyselminlhiis denticulatus (Rudolphi, 1802), de Blainville, Diet. d. Sci. iiat., 



LVII, p. 607. 

 1853, T(vn\a yoezei, Baiud, Cat. Entozoa Coll. British Museum, p. 78. 

 1881, Cittotwnia laiUsima, Keibm, Zcitschr, f. d. ges. Naturw., 3 ser., VI, p. 200. 

 1881, Dipylidium laiisximum (Riehm, 1881;, Riehm, Zeitschr. f. d. ges. Naturwiss., 3ser., 



VI, pp. 583-5'JO, pi. V, figs. 5, 15, 17 ; vi, fig. 2. 

 1887, Ta'nia laiissima (Riehm, 1881), Neumann, Traite des maladies parasitaires non- 



microbiennes, p. 426. 

 1891, Moniezia denticnla [/a] (Rudolphi, 1804), R. Blanchard, M<5m. Soc. zool. France, 



IV, p. 187. 

 1891, Moniezia latissma (Riehm, 1881), R. Blanchard, M6m. Soe. zool. Franco, IV, 



pp. 187, 451. 

 1891, Moniezia goezei (Baird, 1853), R. ]5lanciiard, Mem. Soc. zool. France, IV, pp. 



444, 452-457, figs. 21-25. 



