518 



of the body. Spiculum 935 // in length. Its pouch covered with 

 little spines. The form of the bursa is shewn by figs. 8 and 9. 



5. Trichosoma simile sp. n. (figs. 10, 11), from the intestine 

 of Turdus pilaris L. Female: 12"S mm. long; neck 58 mm. long. 

 Lateral bands about 23 fi broad, i. e. 1 j i of the breadth of the 

 body; ventral band 14 // broad, i. e. 1 / à of the same breadth. Ge- 

 nital opening near the end of the Oesophagus. Eggs 66— 68 // long 

 and 30 — 32 /( broad, with a délicate superficial net. Male: Body 

 about 7 (?) mm. long; the posterior part of the body (behind the 

 neck) 2 - 6 mm. long. Lateral bands 14 /< broad, i. e. i / i of the 

 breadth of the body; ventral band 7"5 /i broad. i. e. 1 / 7 of the same 

 breadth. Spiculum 0'5 mm. in length. The form of the bursa is shown 

 by fig. 11. 



6. Diploposthe sui-generis sp. n. (?) (fig. 12 — 20). One 

 spécimen only of this tape-worm. found by the author in the intes- 

 tinum of a Fuligula leucophthalmos Bechs.. could not be deter- 

 mined with certainty because the head with hooks and the older 

 proglottides with oncospheres were missing in it. The structure of 

 the internai organs however, especially of the reproductive maie 

 organs, offers many détails so différent from those in D. laevis Dies. 

 (the anatomy of D. lata Fuhrm. is up to the présent unknown) as 

 described by J a c o b i (6) and C o h n (2), that the worm in question 

 may be considered: either ac an interesting atavistic spécimen of D. 

 laevis (or. D. lata?), or (and this seems more probable) as a new species. 



We cite hère some more important détails: 



Musculature. Besides the five Systems of the muscle fibers 

 described by Jacobi and Cohn in D. laevis. hère still occur three 

 new ones: J) a laver of the subepithelial longitudinal thin muscle 

 fibers (fig. 16, m. 1. sep.) under the profound epithelial cells, 2) a layer 

 of few verv thin diagonal fibers crossing one another (fig. 16, m. 

 d.), lying between the last mentioned muscles and the external lon- 

 gitudinal ones, 3) a thick ring of circular or transversal muscle 

 fibers (fig. 19, m. t. ex.) near tbe posterior margin of each proglottis. 

 In the arrangement of the other muscles also some différences 

 occur, as shown by fig. 16 and 19. It will suffice to mention that 

 the inner longitudinal muscle bundles extend in D. sui-generis more 

 sideward. than in D. laevis (Jacobi): there are more over 2 to 

 3 bundles outside the vasa excretoria belongiüg to the same laver 

 (fig. 19, m. 1. in.). 



