DR. T. S. COBBOLD ON SOME NEW FORMS OF ENTOZOA. 365 



5. ASCARIS TiiiBOTHRioiDES (mihi). Head truncate, with tlu-ee sueker-like processes; 

 neck constricted ; body uniformly linear ; tail conical, with a short blunt extremity. 

 Length about 1 in. (Figs. 10, 11.) 



Remarks. — I 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 obscurus), and neither of these was sufficiently fresh to exhibit its internal 

 structure to advantage. 



6. CojNTJBUS. From a specimen of the Ring-tailed Lemur of Madagascar {Lemur muco), 

 which died at the Zoological Gardens on the 30th December 1857, and which had been in 

 tills country only four months, I procured a remarkable scries of hydatid-like coenuH 

 (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 sm-face of the extremely atropliied lungs by short pedicles. Here 

 and there small colonies, consistuig of only one or two lobiiles, 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 sui-faces of the imperfectly-formed papillae exhibited a central oval depres- 

 sion (fig. 13), whUe each of the more completely developed eminences was found, on dissec- 

 tion, to contain a single well-formed tape-worm head. Enlarged forty diameters, everv 

 head displayed four suckers and a short proboscis armed with thii-ty-two hooks disposed 

 in two rows (figs. 14, 15). No loose scolioes occupied the interior of the lobules, \^•hich 

 were filled, however, with a pale-yellow serous fluid. 



Appendix. — Among known forms of Entozoa, I may mention the occurrence of TcBniu 

 paradoxa in the Oyster-catcher (figs. 16-19 inclusive) ; and in the Dusky Duck {Anas 

 obscurus) of numerous partially decomposed Tcenice, referable, I think, to T. lamceolata 

 (fig. 20). From the duodenum of a Night Heron {Ardea nyctocorax) I obtained ten or 

 twelve examples of Ttsnia multiformis (fig. 23) ; also three fine specimens of Eustrongylm 

 papillosus (fig. 24) from the mouth of a Crane ( Grus antigone). From the small intestine 

 of an American Barn Owl {Strix perlata) were procui-ed nine individuals of Bistoma cequale, 

 and from a Horned Pheasant several examples of Tcenia infimdibuliformis (fig. 25). The 

 caeca of a Ring-necked Pheasant {FhasiaiiKS torqiiatus) were crowded with Ascaris cesicu- 

 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 a.xis) contained a few degenerated Cercarice, 

 while a large aborted Coemtrus or acephalocyst occupied the left lung of a Goat {Aries 

 tragelaphiis). Several nematodes (fig. 28) were obtained from the lungs of a Peccary 

 {Dycoteles torquatus), while the rectum of a Weasel-headed ArmadUlo {Dasypus sex- 

 cinctus) yielded several specimens oi Ascaris retusa (fig. 22). From the lungs of the 

 Four-horned Antelope {Antilojie quadricornis) I procured several very large cysts of 



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