NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 153 



proximal third of the worm, the uterus occupying the distal two-thirds. 

 Male organs: Testicles about 15 to 30 in a segment, left of the median 

 line 5 they appear in the first or second segment, and atrophy by the 

 fifteenth; cirrus-pouch dorsal of vagina, attains 0.48 mm. in length, 

 crossing the longitudinal canals dorsally. Female organs: Ovary 

 appears in earliest segments in about the median line, and atrophies 

 earlier than the testicles; receptaculum seminis elongate; uterus ven- 

 tral, transverse with distal and proximal pouches. Ova 52 JJL iu diame- 

 ter, pyriform body 12 //, horns crossed. Dorsal canal dorsal to lateral 

 of ventral canal. Genital canals pass dorsally of longitudinal canals 

 and nerves. 



Jlosts. European Eabbit (Lepus cunlculus] by Moniez; Mountain 

 Hare (L. variabilis) by E. Blanchard. 



Type. No. 1452, U.S.N.M., belongs to collection of Moniez. Typi- 

 cal specimens in collection of E. Blanchard (Paris); 1 collection of 

 Bureau of Animal Industry; 1 collection of Stiles (U.S.N.M.); 1 Nos. 

 112, 1353, 1358, 1359, 1360, 1361, U.S.N.M.; 1 collection of Hassall; 1 

 collection of Leidy (University of Pennsylvania) ; T collection of Har- 

 vard University; 1 collection of II. B. Ward. 



Geographical distribution. France: Wimereux (by Moniez); Brian- 

 on, by E. Blanchard. 



ANOPLOCEPHALA MAMILLANA (Mehlis, 1831), R. Blanchard, 1891. 

 (Plates V, fig. 8; VI, figs. 1-3.) 



1831, Tcenia mamillana, MEHLIS, Gurlt's Lehrbuch d. path. Anat. d. Haussaugetliiere, 



I, p. 380, pi. ix, figs. 7, 11. 

 1891, Anoplocepliala mamillana (MEHLIS, 1831), R. BLANCHARD, Me'm. Soc. zool. France, 



IV, p. 187. 



Diagnosis. Anoplocephala mamillana (Mehlis, 1831), E. Blanchard, 

 1891: Strobila attains 6 to 30 mm. in length by 4 to 6 mm. in breadth. 

 Head unarmed, 0.7 to 0.8 mm. broad by 0.5 mm. long; suckers very 

 muscular, elliptical with elongate openings; posterior lobes absent. 

 Neck absent. Thirty-five to fifty-two segments present, the distal 4 to 

 8 completely filled with ova; sexually active segments 3 to 5 mm. 

 broad by 0.3 to 0.6 mm. long; posterior segments may attain 2 mm. in 

 length. Genital pores unilateral in posterior half of lateral margin. 

 Male organs: Testicles confined to aporose side of segment, appearing 

 in the first segments, and atrophying by the seventeenth to eighteenth 

 segments ; they are 60 to 100 in number; cirrus-pouch well developed, 

 may attain 0.8 mm. in length, cirrus spinous. Female organs: Vagina 

 ventral of cirrus-pouch; ovary visible in seventh segment, reaches its 

 highest development in thirteenth to sixteenth and atrophies in twen- 

 tieth to twenty-second; it is situated slightly to the right of the median 

 line; receptaculum seminis globular; the transverse uterus appears in 

 fifth or sixth segment, develops proximal and distal pouches, and 

 begins to fill about the fifteenth segment; eggs oval, 88 /* by 50 to 60 //. 



1 Specimens distributed from collection of R. Blanchard. 



