586 SUMMARY OF CURRENT RESEARCHES RELATING TO 



may be said that the neuroglia in Vertebrates and Invertebrates has the 

 same minute histological structure. There is also much to be said for 

 the position that the fibrillse of the neuroglia are comparable to the 

 fibrillar modification of the protoplasm of other cells, e.g. of epidermal 

 cells. 



Platyh.elminth.es. 



Exotic Ectoparasitic Trematodes.* — Prof. S. Goto has notes on a 

 number of interesting forms, e. g. Pltyllonella liippogloasi O. F. Miiller 

 ( = Epibdella hippoglossi of P. J, van Beneden and Monticelli) ; Epibdella 

 scisense P. J. van Beneden ; several new species of Microcotyle and Acan- 

 thocotyle, Dionclius agassizi g. et sp. n. from the gill of Bemora bracliy- 

 ptera. This new genus seems to combine several of the characters of 

 the Gyrodactylidse and the Monocotylidse. The diagnosis runs : — Body 

 flat and elongated ; with a single posterior sucker, the inner surface of 

 which is divided by radial ridges into ten areas, with one pair of chiti- 

 nous hooks ; mouth at a short distance from the front end ; intestine 

 bifurcated, simple; with four eye-spots; porus genitalis communis 

 submarginal ; testes two, one in front of the other ; no vagina. 



Avian Cestodes. f — Herr Walter Volz gives a list of the Cestoda 

 found in the Corvidffi and in the diurnal birds of prey, with hosts, 

 localities, synonymy, references, tables for identification, and in the case 

 of the less well known species, anatomical descriptions. 



Genera of Bothriocephalidae.l — Herr M. Liihe publishes a series 

 of observations on those Bothriocephalidse which have marginal genital 

 openings. He describes the single form known to be found in reptiles, 

 discusses the general characters of the genital organs of the sub-family, 

 and on the basis of these and the external characters, re-arranges 

 the species afresh into genera. In the genus Abothrium are placed 

 Bothriocephalus rugosus (Gze.), B. infundibuHformis Bud. ( = Tsenia 

 crassa Bloch.), and B. fragilis Bud.; in the genus Ancistroceplialus, 

 B. microceplialus Bud. and B. imbricatus (Dies.) ; in Fistulicola, B. plicatus 

 Bud.; and in Trisenophorus, in addition to T. nodulosus, two uncertain 

 species T. robustus and T. anguillse. All these genera receive new 

 definitions. In connection with the same subject should be noted a 

 brief communication by Dr. V. Ariola § on some points at issue between 

 himself and Lube in regard to the Bothriocephalidse. 



New Planarian.|] — Dr. B. F. Scharff describes what proves to be a 

 new species of Bliynchodemus [B. EowesV) which he found in the Pyrenees 

 under a stone near Eaux Chaudes. The worm was 130 mm. long, and 

 therefore twice as long as any species of Bliynchodemus hitherto known. 

 It differs from the other known species in that marginal glands are 

 present in the nterior region, but appears to be most nearly related to 

 B. terrestris. 



Rhabdocoele Turbellaria.^F — Dr. Adolf Dorler finds that the para- 

 sitic forms described by Calandruccio as Eypotrichina tcrgestina and 



* Jouru. Coll. Sci. Univ. Tokyo, xii. (1900) pp. 263-95 (2 pis.). 



■)• Arch. Naturgtsch., lxvi. (1900) ^pp. 115-74 (3 pis. and 4 tigs.). 



X Zeitschr. wiss. Zool., lxviii. (1900) pp. 43-112 (5 pis.). 



§ Zool. Anzeig., xxiii. (1900) pp. 417-9. 



|| Journ. Linn. Soe. (Zool ), xxviii. (1900) pp. 33-42 (1 pi. and 2 figs.). 



«j[ Zeitschr. -wiss. Zool., lxviii. (1900) pp. 1-42 (3 pis.). 



