414 
Cestode Genus Oochoristica 
Oochoristica will have to be reserved for the forms from reptiles (including, 
probably, Linstowia ameivae), and perhaps certain of those from mammals, 
such as the Tamandua- species; while the rest of the mammalian forms will be 
assigned to Linstowia. In any case, it seems clear that all these forms ought 
to be included in the same subfamily, instead of, as at present, in separate 
families. Without attempting to go into the question fully at present, it may 
be said that on a general view of their characters both genera seem to belong 
rather to the Dilepinidae than to the Anoplocephalidae, among which one of 
them (Linstowia) is at present placed. 
REFERENCES. 
Beddard, F. E. (1913). On a new Tapeworm from (Edicnwius. Proc. Zool. Soc. 861. 
- (1914). On two new Species belonging to the Genera Oochoristica and Linstowia. 
Proc. Zool. Soc. 263. 
- (1916). On two new Species of Cestodes belonging respectively to the Genera Lin¬ 
stowia and Cotugnia. Proc. Zool. Soc. 695. 
- (1917). On the Scolex in the Cestode Genus Duthiersia, and on the Species of that 
Genus. Proc. Zool. Soc. 73. 
I 
Krabbe, H. (1879). [Cestodes of Fedtschenko’s expedition to Turkestan.] Trans. Nat. Soc. 
Moscow , xxxiv. (Russian.) 
La Rue, G. R. (1914). A Revision of the Cestode Family Proteoccphalidae. Illinois Biol. 
Monographs , i. Nos. 1 and 2. 
Luhe, M. (1898). Oochoristica nov. gen. Taeniadarum. Zool. Anz. xxi. 650. 
Ransom, B. H. (1909). The Taenioid Cestodes of North American Birds. U.S. Nat. Mas. 
Bull. 69. 
Rudin, E. (1916). Oochoristica truncate, Krabbe. Zool. Anz. xlvii. 75 and 81. 
- (1917). Die lehthyotaenien der Reptilien. Rev. Suisse Zool. xxv. No. 11. 
Zschokke, F. (1905). Das Genus Oochoristica Lithe. Zeitschr. f. wiss. Zool. lxxxiii. 53. 
EXPLANATION OF PLATE XXI. 
Fig. 1. Oochoristica zonuri. The scolex, much magnified. 
Fig. 2. O. zonuri. Three consecutive mature segments (from a whole preparation). Cl., genital 
cloaca; C.S., cirrus-sac; Ov., ovary; S., shell-gland; T., testes; Vag., vagina; V.D., vas 
deferens; Vit., yolk-gland. 
Fig. 3. 0. zonuri. Transverse section through a mature segment in which the development of 
the uterus has begun. C.S., cirrus-sac; D., dorsal excretory vessel; L., longitudinal muscles; 
N., longitudinal nerves; Od., oviduct; Ov., ovary; S., shell-gland; T., testes; Tr., transverse 
muscle-fibres; Ut., uterus; F., ventral excretory vessels; Vag., vagina; Vit., yolk-gland. 
Fig. 4. O zonuri. Abnormal mature segment, containing two sets of reproductive organs. (From 
a whole preparation.) 
Fig. 5. 0. zonuri. Portion of a transverse section through the cuticle and subcuticular layer, very 
highly magnified. C lf C 2 , outer and inner layers of the cuticle; C.M., circular muscle-fibres; 
G., glandular cells; L.M., longitudinal muscle-fibres; P., cortical parenchyme. 
Fig. 6. Oochoristica agamae. Mature segment (from a whole preparation). Cl., genital cloaca; 
C.S., cirrus sac; Ov., ovary; S., shell-gland; T., testes; Vag., vagina; V.D., vas deferens; 
Vit., yolk-gland. 
Fig. 7. 0. agamae. Mature segment (from a whole preparation), showing the alteration in the 
apparent relations of the genital organs due to stretching of the tissues in imperfectly pre¬ 
served material. 
