On the Structure and Development of the Cysticercus cellulosae, as Found in the Pig, by George Rainey

In concluding this Paper the Author thinks it right to append a brief reference to the views at present entertained as to the nature and relations of the Cystic Entozoa, in order that the bearing of his own researches may be more clearly apprehended. A similarity in the form and armature of the head in the Cysticercus and Tape-worm had led the earlier Ento= zoologists to suspect that there was some latent affinity between the Cystic and the Cestoid Entozoa, and this surmise has through recent investigations grown into a consistent doctrine, <s>according to<\s> by which it is held that the Cysticercus and Taenia are but different conditions of the same animal. It is accordingly now believed that the ovum, or rather embryo, of a tape-worm, being introduced into the body of some higher animal, penetrates through the tissues, probably by aid of the three pairs of hooklets with which it is armed, and on arriving at a suitable resting place is developed into a Cysticercus - in some cases undergoing intermediate changes in its progress thither - that the Cysticercus is a creature destitute of reproductive organs, but that when the flesh of the animal which has afforded it a temporary abode is devoured by a second animal, the parasite, thus introduced into the ali= mentary canal of its new host, meets with a fitting nidus for its further development, and, losing its caudal vesicle, lengthens out, acquires transverse re= ticulation and assumes the form of a jointed tape-worm. The term <u>Scolex<\u> is applied to the cystic and <u>strobila<\u> to the taenioid form of the entozoon; and as each articulation of the taenia is furnished with a perfect sexual apparatus, and, when charged with fertile ova or embryos, may separate in due time from its neigh= bours, a single segment has been looked on a consti= tuting
Please login to transcribe
Manuscript details
- Author
- George Rainey
- Reference
- PT/56/8
- Series
- PT
- Date
- 1857
- IIIF
-
(What's this?)This is a link to the IIIF web URL for this item. You can drag and drop the IIIF image link into other compatible viewers
Cite as
On the Structure and Development of the Cysticercus cellulosae, as Found in the Pig, by George Rainey, 1857. From The Royal Society, PT/56/8
Comments