— 1689 — 



ning lies between the cells of the swallowing apparatus, but is not suffi- 

 ciently clearly seen in my preparations. In the wall of each protonephridium 

 lie three nuclei. 



At the conclusion I consider it opportune to give a description of G. major 

 Brems., as the recent literature contains only few data on it. I had at my dis- 

 posal two females, the length of which reached 1 6 — 1 7 cm. The body is of 

 cylindrical form with numerous transverse wrinkles, narrowed toward both 

 ends of the body. The thickness in the middle part of the body is about 

 4 mm., at the ends of the body — about 2 mm. The proboscis is oviform, 

 measuring 0,742 mm. in length, about 0,3710 mm. in width at the base 

 and about 0,4770 mm. at the anterior thicker part; armed with 12 longi- 

 tudinal and 5 — 6 transverse rows of hooks. The hooks of the anterior rows 

 are fairly thick and massive, with the radix directed forwards. Their form 

 fully agrees with the drawing given by Linstow and Porta. The hooks of 

 the succeeding rows are nearly as long, but considerably more slender. The 

 proboscis sheath is twice, or somewhat, more, longer than the proboscis. The 

 lemnisci are very long (to 40 mm.). Eggs oval, measuring 0,1155 — 

 0,1221 mm. 



/ __ 



Literature. 



1. Kaiser. Die Nephridicn der Acanthocephalen. Centralbl. Bact. Parasit. Bd. 11, 1892. 



2. Kaiser. Die Acanthocephalen und ihre Entwicklung. Bibl. Zool. Hft. 7. 1892. 



3. Porta. GH Acanthocefali dei Mammifefi. Archivio Zoologico. Vol. 4. 



4. Щепотьевъ, А. О нематодахъ и близкихъ къ нимъ группахъ. С.-Петербургъ 1908. 

 (Stchepotiew, A. On the Nematodes and allied groups. St. -Petersburg. 1908). 



Извѣстлі P. A. H. 19X8. 



