330 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Avian Cestodes.* — Dr. Ludwig Cohn publishes some further (pre- 

 liminary) notes on this subject. He erects a new genus — Anomotaenia — 

 for those Cystoidotseniae which have a double circle of hooks, irregularly 

 alternating genital pores, and numerous testes at the posterior end of the 

 j)roglottis. The species of this genus offer a remarkable parallelism 

 to the species of Choanotsenia among Cestodes with one row of hooks. 

 Another new genus, Anonchotxnia, is erected for a new form which is 

 unarmed, has no rostellum, and displays tbe peculiarity of union of uterus 

 and shell-gland in the ripe proglottis to form a common chamber con- 

 taining the eggs. 



Rejection of the Species Bothriocephalus cristatus.j — Dr. Bruno 

 Galli-Valerio has had an opportunity of examining this alleged rare 

 parasite of man, which is characterised by the presence of a projecting 

 longitudinal ridge on each of the flat surfaces of the head. On this 

 account Davaine made a species out of it. But the author agrees with 

 Blancbard that it is only B. latus slightly disguised by a deformity. 



New Heteronemertean4 — Miss C. B. Thompson describes, from 

 Wood's Holl, Zygeupolia liioralis g. et sp. n., one of the Eupolidae, 

 characterised by the following peculiarities: — (1) A layer of inner 

 circular muscle in the anterior intestinal region, formed by a continuation 

 ventrally of the circular muscle of the proboscis-sheath so as to surround 

 the intestine ; (2) a crossing of muscle-fibres from the circular muscle 

 of the proboscis-sheath to the circular muscle of the body-wall ; (3) a 

 pair of pits or grooves in the epidermis above the lateral nerves a short 

 distance in front of the end of the anterior intestinal region. 



New Diplostonmm.§ — L. A. Jagerskiold found in the alimentary 

 canal of Telmatias major specimens of what appears to be a hitherto 

 undescribed species of Diplostomum, which displays some interesting 

 peculiarities. The buccal sucker is exceptionally large, and between it 

 and the ventral sucker there lie two pits recalling the so-called accessory 

 suckers of Hemistomtim and Holostomum and of the larvae of Diplostomum 

 and Tetracotyle. The pits are not like suckers in appearance, and as 

 they have never been previously described in a sexually mature Diplo- 

 stomum, their minute structure was thought to be worth investigation. 

 Sections show that they are surrounded by numerous unicellular glands 

 which open into the lumen of the organ at each side. They cannot 

 therefore be regarded as organs of attachment, and as they are common 

 in the larvae of other species, the new species, D. macrostomum, must be 

 regarded as a primitive form, while the genus itself must be regarded 

 as primitive as compared with the other members of the family. 



Genus Clinostomum Leidy.|| — M. Braun comments on the confusion 

 which exists in regard to the species of this genus, and describes in 

 full the nine sjiecies which are known from mature specimens. In 

 addition there are not a few specimens of which the young forms only 

 are known. These cannot be definitely included in any species. The 

 genus appears to reach its highest development in South America, and 

 those (immature) forms which have been observed in Central Europe 

 probably have their true home in North Africa or Southern Europe. 



* Zool. Anzeig., xxiii. (1900) pp. 91-8. 



t Centralbl. Bukt. u. Par., xxvii. (1900) pp. 305-9. 



t Zool. Anzeig., xxiii. (1900) pp. 151-3. 



§ Centralbl. Bakt. u. Par., xxvii. (1900) pp. 33-7 (5 figs.). || Tom. cit., pp. 24-32. 



