A guide to the microscopical examination of drinking water : with an appendix on the microscopical examination of air / by J.D. MacDonald.

Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: A guide to the microscopical examination of drinking water : with an appendix on the microscopical examination of air / by J.D. MacDonald. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    CILIATA ; PARAMECIA. C. cucullus and C. ornatus are found in both fresh and salt water, while the other two mentioned have only been found m fresh water. 2. Ncissula clerjcins. Though without the lateral frontal process of Cliiloclon, has the same cone of little rod-like teeth. They are evidently very closely allied. There is, moreover, a yellow Ncissula also, N. aurea. 3. Proroclon teres. Body terete, slightly truncated in front; mouth with a little cylinder of teeth. Length 1-140- 4. Glaucoma scintilans. Length 1—290. Body ov al, covered with cilia; the mouth near the smaller end furnished with vibrating lips. This form is usually found in putrid water, and infusions of vegetable matter. 5. Colpoda cucullus. Body ciliated below, smooth above, curved to one side in front, with the mouth in the recess so formed. Length about 1-200. In vegetable infusions, and in water with much organic matter present. 6. Paramecium ciurelia. Length 1—100. The body terete, more or less depressed, with a very regular distri- bution of the cilia; Two contractile vessels are usually well seen in this species. 7. Panophrys crysalis is marine, but distinguished from Paramecium by having the mouth cpiite marginal. Paramecium is like a scavenger, removing organic debris from clear sur- roundings. 8. Eolophrya ovum. Body ovate, green within; cilia dis- posed in longitudinal rows; length, 1—576 to 1—216. 9. Tracliclocerca olor, and 10. Lachrymaria protcus are supposed by some to be the same, but the tail-like process of the former is sufficient to distinguish it, while the body of the latter is more globular.