SCOLECIDA. 
749 
Pamdoxitcs’^, g. n., Lindemann, 1. c. p. 492. This very remarkable genus 
differs from all other known Acanthocephala, indeed from all other Nematel- 
niinthic worms, in having the cylindrical-shaped body divided into a large 
number of equidistant rings or joints resembling those of a Tsenioid worm. 
All these rings are of the same structure, save the first and three last ; the 
first is almost as large as the six following, and in it is found, as in Ecliino- 
rhyncJius, the proboscis invaginated in its sheath. Paradoxites renardi, sp. n,, 
р. 495, pi. 12, from the intestine of Strix passcrina, taken at Wilna, and P. 
tanioides, sp, n., p. 496, taken with the preceding. 
Echinorhynchus rosem. Lindemann, 1. c. p. 484, found 29 examples of this 
parasite in a Leuciscus taken at St. Petersburg ; he gives an account of its 
anatomy, illustrated with some excellent figures. 
Trematoda. 
Costa has found a Distoma in abundance in some Acalephae, and names it 
provisionall}'^ Macrurochccta acalcpharum. Rend. Accad. Napoli, iii. 1864, 
pp. 86-91. 
Distoma lorum. Mecznikow has published brief anatomical details in Arch, 
f. Naturg. 1865, pp. 49-55, taf. 3. 
Cestoidea. 
Eothridkim arcuntum, sp. n., Baird (Proc. Zool. Soc. 1865, p. 68), found in 
the intestines of Morelia spilotcs. 
Eotliriocephalm latus. Stieda (J. c. p. 174) gives a very elaborate description 
of the anatomy of this Tmnioid worm ; from the concluding portion we extract 
the following r6.sum6 : — 
1. The body* substance of P. latvs consists of a simple cellular connective 
tissue. 
2. The external layer of the body is made up of a structureless cuticle. 
3. The muscular fibres are of the type of those called spindle-shaped in 
vertebrated animals ; they are arranged in three directions, and form either, a, 
circular or ring-like muscles, or, h. long muscles, or, c. isolated scattered 
oblique muscles. 
4. B. latus has a genital pore. 
5. The male generative organs are composed of — a. the testes situated on the 
lateral portions of the joints ; h. a common excretory duct for the whole testes ; 
с. a muscular sac through which passes the seminal duct, Sind the anterior 
end of which, folding in on itself, forms d. the penis, in the central portion of 
which the genital pore opens. 
6. The female genital organs are, a. a close vaginal canal opening below the 
genital pores and in front of the muscular sac ; h. a compact H-shaped ovary ; 
c. yellc-sacs and yelk-ducis, joining one with the other, are disposed through 
a large portion of the sides of each joint; from them there is an outer com- 
municable canal-system formed in the middle of each joint ; d. the oviduct 
receives both a canal given off from the end of the vagina and the yelk-duct, 
which opens into it in the middle ; e. the uterus is a very much convoluted 
canal, which possesses an independent opening of its own below that of the 
* This name approaches too closely to Paradoxides, Brongn., a genus of 
Trilobites. 
