206 SUMMAEY OF CURRENT RESEARCHES RELATING TO 



authors have without description noted the occurrence of more or less 

 conspicuous glands apparently similar. He is unable to make any- 

 definite suggestion as to function, but compares the glands to the head- 

 glands of Nemerteans and of some Turbellaria. 



Genera of Bothriocephalidae.* — Herr M. Lube publishes some cor- 

 rections and additions to his systematic survey f of these Cestodes. 

 In his previous paper he described Bothrimonus Duv. as a synonym of 

 Diplocotyle Kr., and therefore to be suppressed in favour of the latter. 

 He has since obtained from the sturgeon what proves to be a new 

 species of Cestode, which shows so much general resemblance to 

 Bothrimonus sturionis Duv., that he is now prepared to admit Duver- 

 noy's genus. The new form receives the name of B. fallax. This 

 admission of the genus Bothrimonus produces certain modifications in 

 the systematic arrangement of the family, and the author therefore re- 

 places his previous definitions, &c, of the sub-family Cyathocephalinse 

 by new ones. 



Rostellum of Tape-worms.} — Prof. W. Blaxland Benham describes 

 two new species of Drepanidotsenia taken from Apteryx, and gives an 

 account of the rostellar apparatus of the genus, one of the new species 

 (D. minuta) proving an unusually favourable object for the study of 

 this structure. Generally it resembles the same structure in other 

 avian Cestodes, and consists of two concentric muscular sacs, in contra- 

 distinction to the rostellum of mammalian Cestodes, which is a solid 

 mass of muscles. A series of figures is given showing the relation of 

 the parts during movement. 



Onchocotylinse.§ — Paul Cerfontaine continues his study of the Octo- 

 cotylidfe, dealing in the present communication with the section for which 

 he proposes the name Onchocotylinae. Hitherto the old genus Oncho- 

 cotyle has been referred, e.g. by Parona and Perugia, to the Oligocotylidre 

 family of the group Polystomeae. But this was under the misapprehen- 

 sion that Onchocotyle has fewer than eight suckers. In reality, behind 

 the fixing disc with its six suckers, there are two others borne on the 

 bifurcations of the caudal appendage. The genus should therefore be 

 referred to the family Octocotylida?. Yet there are many peculiarities 

 which appear to the author to justify a special section, which he defines. 

 In this section of Onchocotylinae he distinguishes three genera, Sgualon- 

 chocotyle, Acanthonchocotyle, and Majonchocotyle, the species of which all 

 occur on the gills of Selachians. 



Cestode with separate Sexes.|| — Herr 0. Fuhrmann gives a brief 

 account of Dioecocestus paronai g. et sp. u. from Plegadis auarauna, one 

 specimen ol which had double male gonads, while the other had ovaries — 

 in fact a dioecious cestode. He describes some other new forms also 

 from birds — Acoleus armatus g. et sp. n., and two new S2>ecies of Gyrocalia 

 — referable to the family Acoleinas, characterised by the disposition of the 

 musculature and by the absence of a vagina. 



* Zool. Anzeig., xxiii. (1900) pp. 8-14. 



t Vera. Deutsch. ZodI. Ges., 1899, pp. 30-55. 



t Quart. Journ. Micr. ScL, xliii. (1900) pp. 83-9R (2 pis.). 



§ Arch. Biol., xvi. (1899) pp. 315-478. 



|| Zool. Anzeig., xxiii. (1900) pp. 48-51. 



