Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-30T20:22:50.458Z Has data issue: false hasContentIssue false
  • English
  • Français

The Excretory System in Digenea (Trematoda). IV. A Study of the Structure and Development of the Excretory System in a Cystocercous Larva, Cercaria pekinensis nov. spec

Published online by Cambridge University Press:  06 April 2009

Ernest Carroll Faust
Ernest Carroll Faust
Affiliation:
(From the Department of Pathology, Peking Union Medical College, Peking, China.)
Get access Rights & Permissions [Opens in a new window]

Extract

1. Cercaria pekinensis, a new cystocercous cercaria, is described.

2. The excretory system of the developed cercaria consists of a bladder, a drainage channel through the tail and a pair of anterior collecting tubules, each of which receives eight main (tertiary) branches. Each branch is composed of 2 × 4 × 4 units. The posterior-most branch cares for the drainage of the tail, including the corresponding flapper.

3. A study of representative stages in development shows that the common denominator of the excretory system is α + β, while the pattern of the developed cercaria is expressed by 4 (α)2 + 4 (β)2.

4. The fundamental pattern of tie cercaria is likewise found in the sporocyst.

5. These data have a significant bearing on the application of mathematics to the problems of growth and development.

Type
Research Article
Information
Parasitology , Volume 13 , Issue 3 , August 1921 , pp. 205 - 212
Copyright
Copyright © Cambridge University Press 1921

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Braun, M. (1891). Die sogenannte “freischwimmende Sporocyste”. Centralbl. f. Bakt. u Parasit., Orig. (1), x. 215–219.Google Scholar
Cort, W. W. (1919). A New Cercariaeum from North America. Journ. Parasitol. v. 86–91 1 pl.Google Scholar
Faust, E. C. (1918). Two New Oystocercous Cercariae from North America. Journ. Parasitol. iv 148–153, 1 pl.Google Scholar
Faust, E. C. (1919, 1919 a, 1919 b). The Excretory System in Digenea. Biol. Bull, xxxvi. 315–344.CrossRefGoogle Scholar
Faust, E. C. (1921). Larval Flukes from Georgia. Trans. Am. Microscop. Soc. (In press.)CrossRefGoogle Scholar
Looss, A. (1894). Die Distomen unserer Fische und Frösche. Bibl. Zool. xvi. 1–296, 9 pls.Google Scholar
Looss, A. (1896). Recherches sur la faune parasitaire de l'Egypte. Mém. l'Institut Egyptien, iii 1–252, 16 pls.Google Scholar
Pratt, H. S. (1919). A New Cystocercous Cercaria. Journ. Parasitol. v. 128–131.Google Scholar
Ward, H. B. (1916). Notes on Two Free-Living Larval Trematodes from North America. Journ. Parasitol. iii. 10–20.Google Scholar
Wright, R. R. (1885). A Free-Swimming Sporocyst. Amer. Nat. xix. 310–311.Google Scholar