470 W. N. F. V,'OODLAND 



/23. Skrjabin, K. — " Fischparasiten aus Turkestan. 1. Hirudinea et 

 Cestodaria ", ' Archiv f. Naturg.', LXXIX. Jahrg., Abt. A, Heft 2, 

 1913, p. 2. 



24. Spencer, W. Baldwin. — " The Anatomy of Amphiptyches urna (Grube 



and Wagener) ", ' Trans. Royal Soc. Victoria ', vol. i, 1889, p. 138. 



25. Wagener, G. R.— " Die Entwicklung der Cestoden, nach eignen Unter- 



suchungen ", ' Nov. Act. Acad. Caes. Leopold-Carol. Nat. Cur.', 

 Bd. xxiv, Suppl., Breslau, 1854. 

 26. — Watson, E. C. — " The Genus Gyrocotyle and its Significance for 

 Problems of Cestode Structure and Phylogeny ", ' Univ. California 

 Pub. Zoology ', vol. vi, no. 1.5, 1911, p. 353. 



27. Will, H. — " Anatomie von Caryophyllaeus mutabilis, Rud. Ein 



Beitrag zur Kenntnis der Cestoden ", ' Zeit. f. wiss. Zool.', Bd. Ivi, 

 1893, p. 1. 



28. Woodland, W. N. F. — " On Amphilina paragonopora, sp. n., and a 



hitherto undescribed Phase in the Life-history of the Genus ", 

 ' Quart. Journ. Micr. Sci.', vol. Ixvii, N.S., 1923, p. il. 



DESCEIPTION OF PLATES 24 AND 25. 



Reference Letters. 

 BH, base of head ; cirs, cirrus sac ; co, cirrus opening : d\'MS, dorso- 

 ventral muscle-fibres ; Excv, excretory vessels ; Fzs, ' Faserzellen- 

 strange ' ? ; H, head region ; ilmus, internal layer of longitudinal muscle- 

 fibres on edge of medulla ; lou, isthmus of ovary ; JN, junction of the two 

 main longitudinal nerve-trunks anteriorly ; lch, longitudinal creases or 

 grooves in subcuticula of head ; ld, local dilatation ; lmus, longitudinal 

 muscle-fibres ; M, medulla ; s, main longitudinal nerve-trunk ; nt, 

 nuclear thickening at base of head ; odcts, ducts from ovary opening 

 into isthmus ; ootp, ootype ; OPO, opening of oviduct into ootj-pe ; ov, 

 ovary ; OVD, oviduct ; ovit, opening of vitelline duct into ootype ; 

 POVR, post-ovarian region ; rcps, receptaculum seminis ; scLMrs, outer 

 layer of longitudinal muscle-fibres underlying subcuticula ; shgi., shell- 

 gland ; TES, testes ; texb, terminal excretory bladder ; TRMrs, transverse 

 muscle-fibres ; uop, opening of uterus into vagina ; t'T, uterus ; vag, 

 vagina ; vagut, rudiment of vagina and uterus ; vdef, vas deferens ; 

 viT, vitellaria ; vitd, vitelline duct ; vro, vagino-uterine opening. 



N.B. — The magnifications gi^ en are those at which the figures were 

 drawn. The 5 cm. scales provided on the two plates show, when compared 

 with an actual 5 cm., the amount of reduction ^ which has occurred in repro- 

 ducing the figures. All figures drawn by means of the camera lucida. 



^ Approximately Ji. 



