556 SUMMAKY OF CUKEENT RESEARCHES RELATING TO 



the free Nematodes do not fall into any of the three groups Secernentes, 

 Resorbentes, and Pleuromyarii, von Linstow proposes a fourth group of 

 Adenophori, They have narrow lateral lines, with nucleated cells and 

 without a longitudinal vessel. If there is an excretory pore, it is the 

 opening of a ventral gland. 



Platyhelminthes. 



Cestode Studies.* — Al. Mr^zek gives as the first of a series of 

 Cestode studies an account of Cysticercoids from Lumbricuhis. He 

 describes AploparaMs crassirostris Kr., Anomotcenia pyriformis Wedl., 

 and two undetermined species of Cysticercus. 



Antarctic Cestodes.t— Arthur E. Shipley describes the three species 

 of Cestodes brought back by the naturalists of the ' Discovery,' all of 

 which were found living together in the stomach of Ross's Seal. They 

 are Dibothriocephahis antarcticus (= Bothriocephalus antarcticus Baird), 

 D. Scotti sp.n., and D. Wilso/ii sp.n., "a very attractive little tapeworm 

 of few proglottides." It is remarkable that the only Cestodes brought 

 back were got in the stomach of one rare animal, and that they belong 

 to one genus. It seems more than likely that the Pleurocercoid stages 

 will be found — if ever they be found — in the tissues of one of the 

 Cephalopods. 



Taenia nana in Belgium. $ — E. Malvoz records having found 31 

 cases in three years of infection with this parasite. The cases occurred 

 amongst miners examined for ankylostomiasis. T. nana is a very 

 slender and fragile Cestode, small, and not easily obtained entire. It 

 does not appear to have an intermediate host. 



Notes on Two Avian Cestodes. § — T. B. Rosseter discusses the 

 structure and systematic position of Tcenia nitida Krabbe and T. niti- 

 dulaas Krabbe. It appears that the morphology and physiology of 

 these worms coincide specifically with Blanchard's diagnosis of the 

 genus Hymemlepis Weinland, and are analogous with the type specimen 

 H. diniinuta. They are therefore now transferred to this genus. 



Trematodes of South American Fishes. || — E. v. Daday has revised 

 the material upon which C. M. Diesing based his monograph of the 

 genera Amphistoma and Biplodiscns, with the result that several new 

 genera and species have been established. A discussion of the histology 

 of the different species is included in the paper. 



Trematode Parasite of Rana esculenta.lf — Paul Kopczynski gives 

 an account of the structure of Codotiocephalus nnitahilis Dies. This 

 parasite occurs inclosed in a small, yellowish-white, round capsule of 

 about 2-3 mm. diameter in the body-cavity and musculature. Of 83 

 Rana esculenta investigated, 44: were found to harbour this parasite. 



* Zool. Jahrb. Abt. Syst., xxiv. (1907) pp. 590-624 (2 pis. and 7 figs.), 

 t National Antarctic Expedition, iii. (1907). Cestoda, 6 pp., 1 pi. 

 : C.R. Soc.Biol. Paris, ixii. (1907) pp. 602-3. 

 § Journ. Quekett Micr. Club, 1907, pp. 31-40 (2 pis.), 

 li Zool. Jahrb. Abt. Syst., xxiv. (1907) pp. 469-590 (6 pis.), 

 t Tom. cit., pp. 625-54 (1 pi. and 5 figs.). 



