DR. T. S. COBBOLD ON SOME NEW FORMS OF ENTOZOA. 365 
. 5. ASCARIS TRIBOTHRIOIDES (mihi). Head truncate, with three sucker-like processes ; 
neck constricted; body uniformly linear; tail conical, with a short blunt extremity. 
Length about lin. (Figs. 10,11.) 
Remarks.—1 am not certain that this eccentric-looking nematode should be considered 
a true Ascaris. Two examples only were detected in the small intestine of a Dusky 
Duck (Anas obscwrus), and neither of these was sufficiently fresh to exhibit its internal 
structure to advantage. ; 
6. Canurus. From a specimen of the Ring-tailed Lemur of Madagascar (Lemur maco), 
which died at the Zoological Gardens on the 30th December 1857, and which had been in 
this country only four months, I procured a remarkable series of hydatid-like cænuri 
(fig..12). They existed in such abundance in the liver, and on both sides of the thorax, 
as to become the immediate cause of the animal’s death. Those in the chest were con- 
nected to the pleura, and occurred in semitransparent pedunculated masses, split up, as it 
were, into numerous lobules, the entire parts of each separate bunch being connected 
together and to the surface of the extremely atrophied lungs by short pedicles. Here 
-and there small colonies, consisting of only one or two lobules, were in process of develop- 
ment. Each lobe presented a variable number of small, round, papillary elevations, which 
in some places assumed a more or less regular linear arrangement. Under a low magnify- 
ing power, the surfaces of the imperfectly-formed papillæ exhibited a central oval depres- 
sion (fig. 13), while each of the more completely developed eminences was found, on dissec- 
tion, to contain a single well-formed tape-worm head. Enlarged forty diameters, every 
head displayed four suckers and a short proboscis armed with thirty-two hooks disposed 
in two rows (figs. 14, 15). No loose scolices occupied the interior of the lobules, which 
were filled, however, with a pale-yellow serous fluid. 
Appendix.—Among known forms of Entozoa, I may mention the occurrence of Tenia 
paradoxa in the Oyster-catcher (figs. 16-19 inclusive); and in the Dusky Duck (Anas 
obscurus) of numerous partially decomposed Tenia, referable, I think, to T. lanceolata 
(fig. 20). From the duodenum of a Night Heron (Ardea nyctocorax) I obtained ten or | 
twelve examples of Tænia multiformis (fig. 23) ; also three fine specimens of Hustrongylus 
- papillosus (fig. 24) from the mouth of a Crane (Grus antigone). From the small intestine 
of an American Barn Owl (Strix perlata) were procured nine individuals of Distoma equale, 
and from a Horned Pheasant several examples of Tenia infundibuliformis (fig. 25). The 
cæca of a Ring-necked Pheasant (Phasianus torquatus) were crowded with Ascaris vesicu- 
laris (fig. 21); and the intestines of a Sandwich Island Goose contained several worms very 
like Heterakis dispar (figs. 26 and 27), besides other nematodes requiring further investi- 
gation. The liver of an Axis Deer (Cervus axis) contained a few degenerated Cercarie, 
While a large aborted Cenurus or acéphalocyst occupied the left lung of a Goat (Aries 
 fragelaphus). Several nematodes (fig. 28) were obtained from the lungs of a Peccary 
(Dycoteles torquatus), while the rectum of a Weasel-headed Armadillo (Dasypus sea- 
, Cinctus) yielded several specimens of Ascaris retusa (fig. 22). From the lungs of pi 
Four-horned Antelope (Antilope quadricornis) I procured several very large opm o 
