NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 227 



FIG. 3. Two views of head, enlarged. After Riehm, 1881, PI. V, fig. la-b. 



4. A young segment showing testicles in the aporose portion of median 



field; the cirrus-pouch and vagina are becoming differentiated, and the 

 anlage of the female glands is distinct; the anlage of the receptaculum 

 connects the anlage of the female glands with the vagina. No. 1484, 

 U.8.N.M, 



5. An older segment; the testicles are larger; cirrus-pouch, vas deferens, 



and the elongate prostatic gland are distinct; the ovary, vitellogene 

 gland, and receptaculum seminis are well developed; the latter is con- 

 nected with the genital pore by the vagina. No. 1484, U.S.N.M. 



6. A still older segment; of the male organs, the cirrus-pouch and a portion 



of the vas deferens are still visible ; of the female organs, the glands 

 have entirely disappeared, the receptaculum seminis and vagina are 

 still preserved, while the developing uterus has assumed the form of a 

 network. No. 1484, U.S.N.M. 



7. A somewhat older segment, in which the cirrus-pouch and the receptacu- 



lum seminis are still visible ; the network of the uterus is much more 

 distinct. No. 1484, U.S.N.M. 



FIGS. 1-2 and 4-7 are drawn from Riehin's cotypes, taken in Saxony, but very poorly 

 preserved. 



N. B. As the statements regarding the uterus are made upon poorly 

 preserved material, they should be taken with reserve until confirmed 

 by an examination of freshly preserved specimens. 

 Drawn by Haines. 



PLATE VIII. 

 Andrya rhopalocephala and Andrya cuniculi. 



FIGS. 1-3. Andrya rhopalocephala, from the European Hare (Lepus timidus). 



1. A gravid segment showing cirrus-pouch, receptaculum seminis, and the 



uterus; the latter has lost its net-like structure. No. 1484, U.S.N.M. 



2. Riehm's original figure. The segment shows: n., longitudinal nerve; E., 



ventral canals, with transverse canal at distal end of the segment; <., 

 testicles; e., ovary; d., vitellogene gland; 8.. shell-gland; r. 8., recep- 

 taculum seminis; 7'., vulva and vagina; c. &., cirrus-pouch; v. ., vesicula 

 seminalis; v. d., vas deferens; p., elongate prostata; u., uterus. After 

 Riehm, 1881, PL VI, fig. 1. 



3. Egg. After Riehm, 1881, PI. V, fig. 18. 



4-8. Andrya cuniculi, from European Wild Rabbit (Lepus cuniculus). 



4. Head and neck. After Riehm, 1881, PL V, fig. 2. 



5. Segment showing: E., ventral canals, connected by transverse canals ; t., 



testicles; e., ovary; d., vitellogene gland; *., shell-gland; r. 8., recep- 

 taculum seminis; v. d., vas deferens; p., round prostata; 1. m., r. w., 

 longitudinal and circular muscles of the cirrus-pouch (c. &.); v. s. } vesi- 

 cula seminalis; v., vagina. After Riehm, 1881, PL VI, fig. 3. 

 6-8. Segments in three different stages of development. Drawn from one of 

 Riehm's original specimens labelled " Tcenla rhopalocephala" from 

 "Lepus timidus," see p. 155. No. 1377, U.S.N.M., poorly preserved. 

 Drawn by Haines. 



PLATE IX. 

 Andrya cuniculi; Bertia studeri ; Bertia mucronata; Bertia conferta. 



FIG. 1. Andrya cuniculi, gravid segment showing cirrus-pouch, receptaculum semi- 

 nis, and uterus with eggs. No. 1377, U.S.N.M. 

 2-3. Bertia studeri, from the Chimpanzee (Anthropopithecua troglodytes). 



