. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Mr. H. J. Carter on a Freshtoater Species of Ccratmrn. 229 XX^^II.—Note on a Freshwatet' TSpecies of Ceratium from the Liike of Nipiee [Naini) Tal in Kumaon. By H. J. Carter, &c. Several species of horned Peridinea (viz. of Ceratium) from the Baltic Sea have been described by Ehrenberg and others, while those called by the former C. tripos and have been seen by MM. Pringshcim and Werncck, respectively, in fresh water also (Clap, et Lachm. ' Etudes sur les In
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Mr. H. J. Carter on a Freshtoater Species of Ccratmrn. 229 XX^^II.—Note on a Freshwatet' TSpecies of Ceratium from the Liike of Nipiee [Naini) Tal in Kumaon. By H. J. Carter, &c. Several species of horned Peridinea (viz. of Ceratium) from the Baltic Sea have been described by Ehrenberg and others, while those called by the former C. tripos and have been seen by MM. Pringshcim and Werncck, respectively, in fresh water also (Clap, et Lachm. ' Etudes sur les Infusoires' &c. vol. i. pp. 399 and 400). Perty (Zm* Kenntniss &c. p. 161, pi. 7. fig. 13) describes one, under the name of C lon- (/icor7ie, from the Swiss lakes, where they are found; and, lastly, we have them from the lakes of the Himalaya and Lower Bengal, Thus my friend Dr. Forbes Watson, of the India Museum, has submitted to me for re- port a glass slide containing several mounted in gum from the lake of Njnee Tal. Of these, Mr.' Stewart Clark, Inspector-General of Prisons, , who for-. wards them, states that they are " perfectly visible to the naked eye, chiefly on the surface, 10-15 feet dow^n, very few below 20 feet, and probably none at the very bottom of the lake, which is 95 feet deep. " They are found in all the lakes of Kumaon at an elevation of from 4000 to 6500 feet above the level of the sea. "The ordinary beautiful blue colour of the lake at Nynee Tal was at their captm'e, and had been for some months previously, changed to a rusty brown, by the presence of myriads of this kind of ; 'J'he chief interest in the species is that, although it is closely allied to , Elir., yet it must be regarded as a variety of this form, inasnnich as the posterior horn in the figures of the latter given by Ehrenberg (' Tnfusionsthier.') and (^la- j)arede (' Etudes '), respectively, is represented as smooth, while in those forwar
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