ZOOLOGY AND BOTANY. MICROSCOPY, ETC. 
57 
its intermediate host nothing is definitely known. Its anatomy is here 
sufficiently discussed, but it is not in any remarkable way divergent. 
The Tubular Organ of Oncholaimus.* — Dr. O. Zur Strassen dis- 
cusses the peculiar organ discovered by De Man in the females of 
Oncholaimus. 
In 0. fuscus De Man described the tubular organ as a closed tube 
lying in the body-cavity, extending for about two-thirds of the animal’s 
length, communicating with the exterior by two short chitinous tubes, 
which open on each side, just in front of the anus. Moreover, there are 
two delicate connecting tubules from two papillce on the enigmatical 
organ to the two branches of the uterus. In 0. albidus it is much the 
same, but there is only one papilla. 
Zur Strassen finds in 0. pristiurus sp. n. and in 0. de Mani that the 
tubular organ is in open communication with the gut. The inner end 
has Rhizopod-like cells ; with the stem of the tube a rosette- shaped 
gland is associated. The function, probably associated with reproduction, 
remains quite obscure, and the difficulty is increased by the divergence 
between the species. 
Notes on some known and unknown Entozoa-t — Herr A. 
Mueller describes (1) Filar ia gastrophila sp. n. from the stomach of 
the domestic cat, a parasite interesting not only because it was hitherto 
unknown, but also because the parasites are located in great numbers at 
the lower end of the oesophagus and the cardiac end of stomach. The 
bodies project into the stomach and block up the oesophageal aperture 
so that the animal dies of hunger. (2) Strongyluris brevicaudata sp. n. 
from the intestine of Agama colonum , a species of West African lizard. 
(3) Trachocephalus qffinis Rud. from Gervus capreolus. (4) Trichocephalus 
unguiculatus Rud. from Lepus timidus. (5) Liorhyncus vulpis Duj. from 
the lungs of Canis vulpes. (6) Echinorhynchus pristis Rud. from the 
intestine of Exoccetus evolans and exsiliens. (7) Echinorhynchus annulatus 
Rud. from the same source. (8) Mono stoma jilum Duj. from the intestine 
of the first-mentioned fishes. (9) Monostoma filicolle Rud. from the fins 
of Exoccetus. (10) Distoma militare Rud. from the gut of Ballus 
aquaticus , and Distoma segmentatum sp. n. from the gut of an African 
bird, Vidua par adisea. 
Platybelminthes. 
Stilet of Hoplonemertines.J — Mr. T. H. Montgomery confirms the 
statement of v. Kennel that the primary stilet of these worms has not 
the same structure as the secondary, but is always simpler; he finds 
that it is quite impossible for the latter to replace the former. The 
primary stilet lies in an evagination of the wall of the anterior part 
of the proboscis ; the wall of the former is made up of an epithelium, 
basal membrane, single layer of outer circular muscular fibres, and a 
membrane of connective tissue. The anterior part of the evagination 
forms a circular fold round the base of the stilet itself and is lined by a 
* Zeitschr. f. wiss. Zool., lviii. (1894) pp. 460-74 (1 pi.). 
f Arch. f. Naturg., lx. (1894) pp. 112-28 (1 pi.). See Centralbl. f. Bakteriol. u. 
Parasitenk., xvi. (1894) p. 930. 
t Zool. Anzeig., xvii. (1894) pp. 298-300 (3 figs.) ; 301 and 2. 
