724 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
large glandular atrium which is tubular in form and much like that of 
Acanthodrilus. Each ovary is inclosed in a separate coelomic sac, which 
contains a portion of the nephridium belonging to its segment ; the two 
ovarian sacs communicate with each other by a narrow tube-like sac, and 
also with a large sac which forms a complete ring encircling the oeso- 
phagus, and is continued into an extensive sac passing along the dorsal 
surface of the intestine into the fifteenth segment. The bursa copulatrix 
is a small globular sac from which arises a slender spermatheca with 
very muscular walls ; this spermatheca is entirely inclosed by the left- 
hand portion of the perioesophageal ring and ends blindly in the interior 
of that coelomic space. 
j3. Nematbelmintlies. 
New Species of Strongylus from Paunch of Ox.* — Dr. E. Ostertag 
has a preliminary notice of Strongylus convolutus sp. n., found in the paunch 
of a young bull. It was present in considerable numbers and seemed 
to have caused considerable disturbance of the nutrient processes. The 
parasites are small (male 7-9, female 10-13 mm. long), and of a yellowish- 
brown colour ; the colour is due to small pigment-grains in the intestine. 
The form is said to be distinguished by its simple structure, the two 
glandular organs near the commencement of the enteron, and the bell-like 
dermal fold over the vulva. 
y. Platyhelmintlies. 
Northern Turbellaria and Nemertinea.t — Mr. D. Bergendal has a 
preliminary notice of his studies on northern Turbellaria and Nemertinea. 
Uteriporus vulgaris is the name given to a form which in external 
appearance has considerable resemblance to Gunda . The generic 
character appears to be the presence of an independent opening 
to the uterus which is placed near the orifice of the penial sheath. 
There is a small depression around the genital orifices. The oviducts 
unite behind the penis into a common duct which runs forward and 
opens into the cavity of the penial sheath. The arrangement of the 
organs is almost segmental, it being very rare to find more than one testis 
in each septum. 
A new genus must be made for a large Polyclad which is like 
Cryptocelis ; it is distinguished chiefly by the strong muscular glands 
which lie in a special cavity behind the separate genital orifices. The 
author proposes to call the form Cryptocelides Loveni. About thirty 
species of Nemertinea were observed in Bohuslan, some ten of which 
seem to be new ; two of the more interesting are parasitic, one living in 
Esperia lingua and the other in Phallusia mentula. 
Amphibdella torpedinis.J — Sigg. C. Tarona and A. Perugia make 
some additions to our knowledge of this parasite of Torpedo narce. The 
length of sexually mature forms varies between 1 • 5 and 5 mm. ; as in 
Gyrodactylus elegans the anterior end bears a number of dermal glands ; 
the oral orifice is ventral and lies in a sucker- like organ ; the oesophagus 
* Centralbl. f. Bakteriol. u. Parasitenk , viii. (1890) pp. 457-60. 
t Ofv. K. Vet. Forkand., 1890, pp. 323 8. 
% Ann. Mus. Civ. Genova, xxix. (1890) pp. 363-7. See Centralbl. f. Bakteriol., 
viii. (1890) pp. 335-6. 
