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seen several pale, non-nucleated, globular little masses or cells, with- 

 out any distinct cell-wall being evident, beset all over with minute 

 bodies ; only one is figured, though the others were alike, Fig. 12 ; 

 but whether these represented spermatic cells or stages in develop- 

 ment of the ova I could not determine ; others, smaller and very 

 distinctly granular, appeared to be only earlier stages of these 

 bodies or ova, Fig. 13. Likewise well-developed mature ova, 

 rather smaller than the ova of ordinary tasnia, were seen, Fig. 14. 

 I had the satisfaction of showing many of the slides to my friend 

 Dr. John Macdonald, F.R.S., of Netley Hospital, who has paid 

 considerable attention to these subjects, and to him I am indebted 

 for pointing out the mammillated condition of the integument in a 

 specimen which had been mounted about four days in glycerine 

 with acetic acid, which I had not previously noticed, Fig. 15. He 

 likewise confirmed the opinion of immature and well-developed ova 

 being present, and he kindly procured for me a specimen of Taenia 

 solium, which was handed to me after the drawings had been 

 made, and from which two ova have been figured for comparison, 

 Fig. 16 ; thus, I think, solving any doubt as to the nature and 

 condition of the little entozoon. 



These sundry particulars formed the chief features obtained by 

 the microscopic examination, on which to try and build up anatomi- 

 cally this peculiar parasite, which evidently falls into Dr. Cjbbold's 

 fifth order, Cestoda ; Sub-class, Anenterelmintha ; Class, Helmintha. 

 And I do not think we need hesitate to place it with the Taeniae, 

 but to which particular species, I feel great diffidence, for it is 

 exceedingly difficult, even with this amount of detail, to arrange the 

 several parts in their exact respective positions ; for example, where 

 are the eight short spines to be placed ? how was the vitelligene 

 organ or the ovarium situated ? where the intromittent organ, 

 centrally or at the side ? and where the dense lobulated mass ? 

 Again, to what parts are the small denticulated plates and the larger 

 fiat ones to be referred ? Any attempts to construct an ideal whole 

 would be likely to be very erroneously given ; yet it may be as 

 well, looking to the position which the sundry larger portions 

 removed seemed to occupy or to bear to each other, to make the 

 attempt, though it must be perfectly understood as only ideal and 

 subject to correction. Such is given in outline in Fig. 17. No 

 transverse line was seen marking a distinction between the head 

 and caudal parts; no separation into proglottides; in fact, the 

 creature appears to me a paradox, and had not this name been 

 already employed, I should have pressed it into use for the nomen- 

 clature, as certainly this little puzzling entozoon, from the high and 

 unusual point to which its development had been carried in its 

 encysted state or without the necessity of another host, has special 

 claims on our attention, more especially from the presence of ova ; 



